**The new Raspberry Pi bootloader is out which makes these instructions only necessary if you want to continue to use the SD card as a bootloader. View the Raspberry Pi Bootloader Configuration Guide here!**
The Raspberry Pi 4* is finally here and has a lot of exciting changes. One very major downside is that it doesn’t support true USB booting yet out of the box (like the 3 series did). The Raspberry Pi foundation states that it is being worked on and will be added back with a future update. No timeline has been given yet for that to happen but they state it’s one of their top priorities.
Most of my projects heavily depend on having good performing storage so sitting and waiting was not an acceptable solution. In this guide I’ll show you a workaround to use USB devices as your rootfs device and use a Micro SD card as bootloader only which gives us full SSD performance after boot! To see exactly how much of a performance difference this makes (spoiler: it’s gigantic) check out the Raspberry Pi Storage Benchmarks.
I highly recommend doing this on a completely new install. If you try to upgrade your old ones and something goes wrong there’s a good chance you might lose data. We will be modifying the boot partition, resizing partitions, etc. so don’t use a drive with any data on it unless you are positive you have all of the steps down!
Compatible USB Adapters
The Raspberry Pi 4 is proving to be picky about what SATA, M.2, etc. adapters will work in the USB 3.0 port. The USB 3.0 ports are the ones in the middle that are blue inside. The black ones are USB 2.0 and won’t give you the faster speeds the new Pi offers.
It’s very likely that some of these will be fixed via software and firmware updates and the Raspberry Pi Foundation has several open known issues related to USB 3. Until that happens though I will maintain a list here of known working ones and known problematic ones. It’s still very early in the release of the Pi 4 so we still have a lot to learn about which adapters work / don’t work. If you have working and nonworking adapters leave a comment and I’ll add it in this list.
If the adapters worked before on older Pis then one thing you can try is putting them in the black USB 2.0 ports. Obviously this is stupid because we all want the Pi 4 performance gains but if you end up needing to buy a new adapter this will give you a workaround until a replacement arrives!
Find USB adapter chipset
There are certain chipsets used in adapters that are known to be working/not working.
pi@raspberrypi:~ $ lsusb Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 002 Device 002: ID 174c:55aa ASMedia Technology Inc. Name: ASM1051E SATA 6Gb/s bridge, ASM1053E SATA 6Gb/s bridge, ASM1153 SATA 3Gb/s bridge, ASM1153E SATA 6Gb/s bridge Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 002: ID 2109:3431 VIA Labs, Inc. Hub Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
This is a lsusb dump of all my connected USB devices. I have bolded the line with the USB bridge device. We can see that the chipset is ASM1153E. This is a really common one that works well with the Pi.
The new USB-C 3.1 Type A version of the Sabrent adapter is reported as working in the comments by UEF. DO NOT get the USB 3.0 version as that one is below on the naughty list and won’t work!
Make absolutely sure it’s the 10Gbps USB 3.1 Gen 2 version. There is another one that looks identical that is a USB 3.1 Gen 2 6Gbps that will not work. Confirmed working by RRT in the comments.
It’s bold. It’s beautiful. It’s also confirmed working by TADRACKET and Steve B. However, be warned, it takes a *lot* of power! Steve B. reports that even with the oversized 3.5A CanaKit adapter* it does not work. If you have the standard 3.0 adapter you can be practically certain it won’t power this enclosure. Does work with a powered USB hub*.
Returning legendary commentary Frank Meyer reports: Does not work with a 3.0A power adapter (also reported by TTE). It’s not enough power for this enclosure. Does work with a powered USB hub*.
M.Yusuf has given the first ever report of a working Orico adapter! Make sure it’s the USB 3.1 Gen 2 version that says “Support UASP for NVMe SSD”. This is the way.
Canakit has been making very reliable power supplies for several Pi generations now. Using a 3.5A power supply will give enough extra power for your Pi to power the drive without causing instability
Reported as working by JeffG but with an ugly messy appearance
Known Working Adapters
Known Problematic Adapters (Naughty List)
Here is a list of common USB adapters that are known to have problems with the Raspberry Pi 4. You can get some of these adapters working by using quirks mode (see the “Fix (some) USB Adapter Problems Using Quirks” section below).
Only works in the USB 2.0 ports. Will not boot in a USB 3.0 port. I have two of these and can confirm they don’t work. RIP to Sabrent, our previous king of the Pi 3 era of adapters.
Despite earlier reports as working Ryan and one other have reported this adapter does not work unless you enable quirks mode! Don’t make Ryan’s sacrifice in vain and avoid this one.
Extremely cheap adapter from AliExpress — MADATALIEXPRESS bought 5 of them and none worked, PPCM had one working, very unreliable and slow when it does work, not recommended even if you get lucky!
The Samsung 980 Pro (NVMe) is a professional grade SSD and one of the fastest in the world. The Samsung NVMe drives have been at the top of this category for a long time and are well trusted for both their performance and reliability / long life.
The ICY BOX is basically a giant heatsink that you mount a high performance M.2 NVMe drive inside of. This enclosure is really fast but requires a powered USB hub. Not even the 3.5A adapter can reliably power it! The enclosure works well and will physically feel warm to the touch as it is pulling the heat off your NVMe drive!
The Kingston A400 has been a great drive to use with the Pi for years. It’s reliable, widely available around the world, has low power requirements and performs very well. It’s also very affordable. This drive has been benchmarked over 1000 times at pibenchmarks.com and is the #1 most popular SSD among the Pi community!
The SanDisk Extreme Pro USB SSD is a true solid state drive. This is different than a typical “flash drive” which uses extremely cheap memory and has very low random I/O performance/throughput compared to a real solid state drive. I’ve used both the USB 3.1 and USB 3.2 variants with the Pi successfully and they benchmark very well!
You may use other types of drives with the Pi such as M.2 SATA to USB 3.0 and m-SATA to USB 3.0. Here’s some adapters I’ve used for those types of drives:
VL716 mSATA Enclosure
The VL716 mSATA enclosure lets you connect micro SATA drives to the Pi. These drives are an older type of SSD (usually seen in laptops) predating the M.2 slot but are still widely available and perform extremely well!
The UGREEN M+B enclosure is a great enclosure for the Pi for M.2 SATA 2280 NGFF drives. It supports both B-key and M-key drives. Does not support newer NVMe drives. As with other types of enclosures it requires more power than other options!
The Argon ONE M.2 is a M.2 SATA Pi 4 case / storage solution. With the case and M.2 SATA expansion board you can completely enclosure your Pi 4 and have a built in M.2 slot! The M.2 SATA board is sometimes sold separately from the case itself and can be used as well. Does not support NVMe, this is for SATA M.2 drives only!
Power can be a serious problem with these drives. We are learning from the comments that you are especially likely to run into power issues with NVMe enclosures. A powered USB hub or a power adapter that puts out 3.5A comes not only just strongly recommended, it may actually be required that you choose one option or the other for your drive to function.
The specific requirements of how much power you’ll need depend on the adapter/enclosure and the model of your drive itself. As a very rough guideline, older models of drives tend to use more power than newer models of drives. 3.5″ form factor drives also use more power than 2.5″ drives. The earliest SSD models like first and second generation models are also well understood to use significantly more power than newer models. This is due to changes and improvements in technology over the years and even using different more efficient memory like 3D NAND. Some super high end performance drives will consume more power as well.
Here’s the current recommendations based on everyone’s comments combined with stuff I’ve personally used with the Pi:
CanaKit 3.5A Power Adapter
The CanaKit 3.5A adapter has an extra half an amp (500 mA) of capacity to give some breathing room to your accessories. This is bigger than the official Pi power supply which provides 3.0A.
The Sabrent powered USB hub delivers a whopping 2.5A of dedicated power for your USB attached devices. This is almost as much as the Pi adapter itself is rated for (3.0A). It will easily power the most thirsty of setups such as NVMe enclosures.
Note: Make sure Amazon doesn’t try to take you to the non-powered version and that it’s the one with the AC adapter that plugs in to provide extra power
Fixing (some) USB Adapter Problems Using Quirks
Some of the very common adapters on the naughty list above (such as the Sabrent) can be made to work by using USB quirks to disable UAS mode on the drive. This lowers performance, but it’s still much faster than a SD card and your adapter won’t go to waste.
To find out the quirks we need to find the device ID string for your adapter and then add an entry to cmdline.txt telling the kernel to apply them on boot.
Find Your Adapter
To apply the quirks we first need to get the adapter id. We will use the sudo lsusb command:
$ sudo lsusb
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 002: ID 174c:55aa ASMedia Technology Inc. Name: ASM1051E SATA 6Gb/s bridge, ASM1053E SATA 6Gb/s bridge, ASM1153 SATA 3Gb/s bridge, ASM1153E SATA 6Gb/s bridge
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 002: ID 2109:3431 VIA Labs, Inc. Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
On line 2 we can see my ASM1051E SATA 6Gb/s bridge adapter (it’s the known working StarTech.com 2.5″ SATA to USB adapter*). You will see something very similar to mine when you run the command and it shouldn’t be too hard to figure out which device it is. If you need more information add a -v switch to make the command sudo lsusb -v. This can sometimes add some additional details to make it easier to figure out which one is your adapter.
If you’re still not sure, we have another command that between the two that can narrow things down. Type / paste the following:
sudo dmesg | grep usb
[ 0.828535] usb usb3: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 4.19
[ 0.828568] usb usb3: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[ 0.828597] usb usb3: Product: DWC OTG Controller
[ 0.828620] usb usb3: Manufacturer: Linux 4.19.75-v7l+ dwc_otg_hcd
[ 0.828644] usb usb3: SerialNumber: fe980000.usb
[ 0.830051] usbcore: registered new interface driver uas
[ 0.830182] usbcore: registered new interface driver usb-storage
[ 0.836488] usbcore: registered new interface driver usbhid
[ 0.836511] usbhid: USB HID core driver
[ 0.971598] usb 1-1: new high-speed USB device number 2 using xhci_hcd
[ 1.154217] usb 1-1: New USB device found, idVendor=2109, idProduct=3431, bcdDevice= 4.20
[ 1.154254] usb 1-1: New USB device strings: Mfr=0, Product=1, SerialNumber=0
[ 1.154281] usb 1-1: Product: USB2.0 Hub
[ 1.301989] usb 2-1: new SuperSpeed Gen 1 USB device number 2 using xhci_hcd
[ 1.332965] usb 2-1: New USB device found, idVendor=174c, idProduct=55aa, bcdDevice= 1.00
[ 1.332999] usb 2-1: New USB device strings: Mfr=2, Product=3, SerialNumber=1
[ 1.333026] usb 2-1: Product: ASM105x
[ 1.333048] usb 2-1: Manufacturer: ASMT
[ 1.333071] usb 2-1: SerialNumber: 123456789B79F
This is the dmesg log showing the hardware detection as hardware is activated on the Pi. If your log is really long you can generate fresh entries by just unplugging a device and plugging it back in and running the command again. Here we can clearly see that the ASM105x is what our StarTech adapter is being detected as.
Now we can go back to our first lsusb command and we want the 8 characters from the ID field that comes right after the Device:
Bus 002 Device 002: ID 174c:55aa ASMedia Technology Inc. Name: ASM1051E SATA 6Gb/s bridge
Our adapter’s ID is: 174c:55aa
Applying Quirks
To apply the quirks to our USB adapter we are going to edit /boot/cmdline.txt. Type:
sudo nano /boot/cmdline.txt
We are going to add the following entry into the very front of cmdline.txt:
usb-storage.quirks=XXXX:XXXX:u
In place of the X’s above you will put in your adapter’s ID that we got before. With the example commands I gave above mine would look like this: usb-storage.quirks=174c:55aa:u. After this my cmdline.txt looks like this (everything should be one continuous line, no line breaks!):
Now reboot the Pi. If the Pi fails to boot you can plug the SD card into the computer and go to /boot/cmdline.txt and undo the change we did so you can boot back in with your SD card.
Verifying Quirks
Once you have rebooted after changing cmdline.txt we can verify the quirks have been applied by doing another dmesg | grep usb command:
sudo dmesg | grep usb
[ 1.332924] usb 2-1: New USB device found, idVendor=174c, idProduct=55aa, bcdDevice= 1.00
[ 1.332957] usb 2-1: New USB device strings: Mfr=2, Product=3, SerialNumber=1
[ 1.332983] usb 2-1: Product: ASM105x
[ 1.333006] usb 2-1: Manufacturer: ASMT
[ 1.333028] usb 2-1: SerialNumber: 123456789B79F
[ 1.335967] usb 2-1: UAS is blacklisted for this device, using usb-storage instead
[ 1.336071] usb 2-1: UAS is blacklisted for this device, using usb-storage instead
[ 1.336103] usb-storage 2-1:1.0: USB Mass Storage device detected
[ 1.336479] usb-storage 2-1:1.0: Quirks match for vid 174c pid 55aa: c00000
[ 1.336611] scsi host0: usb-storage 2-1:1.0
This time we can see in dmesg that UAS was blacklisted for the device and it has loaded with the usb-storage driver instead. This driver tends to be more compatible with the “problematic adapters” but the performance is usually significantly lower. It’s definitely worth a try though as some adapters do better with the quirks performance-wise. The only way to know for sure is to run a benchmark (see storage benchmark section near the end).
USB Boot Instructions
There are a lot of steps to follow to set everything up properly. If you make a mistake the first time don’t spend too much time trying to correct it or figure out what you did wrong. It’s usually faster to burn the images again and reconfigure again rather than try to figure out which step you might have made a typo on. It’s much easier the second time!
Note: Don’t attempt to use raw dd commands to write the images. Too many silly things can go wrong that are checked for/fixed by the recommended programs. Do yourself a big favor and use one of the recommends to avoid spending a ton of time troubleshooting basic imaging problems!
Preparing SSD
We are going to burn a second identical copy of Raspbian to the SSD. This ensures everything the Pi needs to boot is there so we can use the SD card as a bootloader but our actual system will be on our nice fast SSD drive.
Note: Make sure you create the empty file named “ssh” on the boot partition of both drives if you are headless or don’t have a mouse/keyboard attached so you can ssh in on the first boot.
First Boot (SD card only, SSD unplugged)
Insert your freshly imaged SD card into the Pi and connect the power. Sign into the Pi for the first time.
Don’t do an apt-get upgrade/dist-upgrade or any additional configuration yet. Just stick with the instructions until we have finished configuration (especially since if something goes wrong you may have to start over and any other setup you did will be lost).
Once the Pi has finished booting and you have signed in for the first time plug in your SSD to your Pi’s USB 3.0 ports. The USB 3.0 ports are the ones that have the blue plastic inside instead of the black plastic (the black ones are USB 2.0 ports).
Change PARTUUID
We need to change the PARTUUID of our SSD’s partitions so the Pi doesn’t get confused about what device to boot from. Right now the partitions on both the SD card and the SSD are an exact match and we need them to be different so we can tell the Pi to boot specifically from our SSD’s partition.
We are going to use fdisk to change the SSD’s PARTUUID to the hexadecimal d34db33f to make our SSD easy to identify. Use the following:
$ sudo fdisk /dev/sda
Welcome to fdisk (util-linux 2.33.1).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.
Command (m for help): p
Disk /dev/sda: 238.5 GiB, 256060514304 bytes, 500118192 sectors
Disk model: ASM105x
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x6c586e13
Device Boot Start End Sectors Size Id Type
/dev/sda1 8192 532479 524288 256M c W95 FAT32 (LBA)
/dev/sda2 532480 500118191 499585712 238.2G 83 Linux
Command (m for help): x
Expert command (m for help): i
Enter the new disk identifier: 0xd34db33f
Disk identifier changed from 0x6c586e13 to 0xd34db33f.
Expert command (m for help): r
Command (m for help): w
The partition table has been altered.
Syncing disks.
Your /dev/mmcblk0 and /dev/sda devices should now be different from each other. The SD card’s ID is 6c586e13 and the SSD’s PARTUUID is now
Update /boot/cmdline.txt
We are going to change cmdline.txt to point to the SSD for booting instead of the SD card. First make a backup of your existing cmdline.txt file with the following command:
sudo cp /boot/cmdline.txt /boot/cmdline.txt.bak
We’ve now created a backup you can restore if something goes wrong. If you need to restore your backup plug the SD card into a computer/device and replace cmdline.txt with cmdline.txt.bak that we made above. Now your Pi should boot normally again.
Open up /boot/cmdline.txt using nano or your favorite text editor:
Make the change and double check the line is what it should be,then press Ctrl+X to save our changes.
Note: cmdline.txt should be one long solid line with no breaks — don’t add any line breaks or the system won’t boot and you’ll need to restore the backup we made earlier!
Test SSD
We are now ready to test booting from the SSD. Restart your Pi by issuing a
sudo reboot
The first boot with your SSD can be slow due to running fsck on the drive. If you have a really large SSD it can take surprisingly long to check all that space. Once the check completes it will mark the drive clean and skip the disk check from now on. It can take over a minute or two sometimes for really big drives so give it at least that much time before assuming it didn’t work.
After signing in we can verify that the SSD is being used like this:
$ findmnt -n -o SOURCE /
/dev/sda2
Verify that partition has switched over as shown below to /dev/sda2 (SSD) instead of /dev/mmcblk0p2 (SD card).
Update /etc/fstab
We are now ready to edit the /etc/fstab file to point to our updated drive. To edit the file type:
We want to change the root ( / ) partition (PARTUUID ending with -02) to load our SSD’s PARTUUID instead of the SD card. Replace the 2nd partition’s PARTUUID field on the last line in the file with the d34db33f label we applied earlier with fdisk. After making the change my /etc/fstab file looks like this:
Press Ctrl+X to tell nano to save our changes. Now type sudo reboot to restart the Pi.
Note: We want to leave the first partition (/boot) on the SD card. If you change this to the SSD then apt will update your SSD instead of the SD card so they won’t be used during boot! Remember that we are using the SD card as a bootloader and that is why the firmware updates (such as start.elf, etc) should go there instead of the SSD’s boot partition (which is never used).
Resizing Filesystem
By default the partition on the SSD / Flash drive will only be 1.8G. The Pi expands this automatically on micro SD drives but we will need to do it ourselves for a SSD / Flash drive. To do this we need to expand the partition and then resize the file system.
First let’s open fdisk and print the partitions:
pi@raspberrypi:~ $ sudo fdisk /dev/sda
Welcome to fdisk (util-linux 2.33.1).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.
Command (m for help): p
Disk /dev/sda: 238.5 GiB, 256060514304 bytes, 500118192 sectors
Disk model: ASM105x
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0xd34db33f
Device Boot Start End Sectors Size Id Type
/dev/sda1 8192 532479 524288 256M c W95 FAT32 (LBA)
/dev/sda2 532480 4390911 3858432 1.9G 83 Linux
There is the line we need. Our start value for /dev/sda2 (rootfs) is 532480. Next we need to remove and recreate the partition as a larger size.
If you make any mistakes during this command just close fdisk by pressing q. The changes won’t be written to disk. If you mess up any of the commands the drive will no longer boot and you’ll have to start over again so be careful!
Command (m for help): d
Partition number (1,2, default 2): 2
Partition 2 has been deleted.
Command (m for help): n
Partition type
p primary (1 primary, 0 extended, 3 free)
e extended (container for logical partitions)
Select (default p): p
Partition number (2-4, default 2): 2
First sector (2048-500118191, default 2048): 532480
Last sector, +/-sectors or +/-size{K,M,G,T,P} (532480-500118191, default 500118191): 500118191
Created a new partition 2 of type 'Linux' and of size 238.2 GiB.
Partition #2 contains a ext4 signature.
Do you want to remove the signature? [Y]es/[N]o: N
Command (m for help): w
The partition table has been altered.
Syncing disks.
If everything went well then type “w” and press enter. Otherwise press “q” to quit and try again. Once you enter “w” the changes will be permanently written to disk!
Now reboot the system. Type “df -h” to view the current disk:
We can see our disk is still 1.8G even after resizing the partition. That’s because we still have one more step! We need to resize the filesystem to fill our new partition space. For this we will use “sudo resize2fs /dev/sda2”:
sudo resize2fs /dev/sda2
resize2fs 1.44.5 (15-Dec-2018)
Filesystem at /dev/sda2 is mounted on /; on-line resizing required
old_desc_blocks = 1, new_desc_blocks = 15
The filesystem on /dev/sda2 is now 62448214 (4k) blocks long.
And that’s it! You will now be using all of your space on your drive.
Verify SSD Functionality / Performance
You can make sure everything is running correctly (and as fast as it should be) by running my quick storage benchmark. You can run the benchmark with the following one-liner:
This will give you a score you can compare to the other Raspberry Pi Storage Benchmark results and make sure that you are getting an equivalent speed to your peers with the same device!
Update Pi using apt
Now that we’ve updated fstab it is safe (and highly recommended) to update your Pi’s software. Type “sudo apt-get update && sudo apt-get dist-upgrade” to update the system and firmware.
Your system will now be running completely from your USB drive! To verify this, run the command “findmnt -n -o SOURCE” / to ensure your root partition has switched over as shown below to /dev/sda2 instead of /dev/mmcblk0p2.
Conclusion
The Samsung 950 Pro NVMe drive in the featured picture scored a 9189 on the Raspberry Pi Storage Benchmark. The previous all-time record score on a Pi 3B+ was 3561. The performance gains are very real and very dramatic.
For me getting this performance is well worth having to waste a micro SD card just to be a bootloader. I am largely after the USB 3.0 bus and gigabit ethernet performance improvements and using this method I am able to achieve the performance I was after without waiting an indeterminate amount of time for the feature to be added back in!
Although there are ongoing compatibility issues and we lack the super easy native USB booting support we had before I’m more than willing to go through the growing pains to finally get rid that ancient USB 2.0 bus! Just make sure if you are planning to build a system you plan your adapters and parts accordingly.
Hi, Thanks for this very informative site.
I have set up a raspberry pi 4, running raspbian, as a desktop system using a 500GB WS Blue SSD.
I have run the performance benchmark several times for both a BENFEI adapter, which only runs with “quirks” (it uses a JMicron chipset) and also a Startech adapter, which runs without “quirks”.
Surprisingly, the results for the Startech adapter are considerably slower (20% or more) for all tests, except to the “FIO” test, where the Startech adapter is several HUNDRED percent faster than the BENFEI adapter. The Starteck gives an overall score of around 5800, while the BENFEI gives a score of around 5200.
Do these results make sense? Why do the “FIO” tests give such different results from the rest?
Any help in understanding these results would be appreciated.
Regards,
Jon
Paul
5 years ago
I used the Orico transparent enclosure, which was really slow without applying quirks. After I applied Quircks it worked fine and the response of my rPI4 has improved compared to the SD card
Jim Brewer
5 years ago
First, James, thank you so much for this post! Very helpful!
Just a headsup, I was just about to purchase the ELUTENG adapter, currently third in the list of known good adapters. Reading user reviews on Amazon, I ran across a review that said the adapter used to work great for booting PIs, but they’ve changed the adapter. The new one with the blue connector doesn’t work with PIs.
So, I placed my order for the first one in the list instead.
James, maybe we should skip what I just said about the ELUTENG adapter.
The review I was referring to didn’t specify which PI model and didn’t specify whether they were truly “booting” from ssd or the sd card.
Another person left a comment on that review that read “I purchased one of these before reading this review. It has a blue connector, but when I plug it into my USB 3.0 port on my Raspberry Pi 4, it works just fine. dd speeds are 326MB/sec reads and 346MB/sec writes to some Samsung SSD I had lying around. So maybe they manufacturer has changed things again and now it works fine?”
Thanks for the info! Recently 0x7878 said their Sabrent adapter was working too but he hasn’t replied back when I asked him to confirm using findmnt.
With all of the kernel and firmware fixes that the Pi keeps getting for USB and UAS I suspect all of these adapters will probably work at some point (even if it’s a workaround they do in the kernel, like automatically applying quirks for certain models).
Let me know if you try the Eluteng and what you find so we can pool everyone’s information together and continue to draw some conclusions about which adapters work the best!
James, my Eluteng adapter arrived and I can confirm it reports the exact same chipset that you shared from your StarTech adapter.
I haven’t tried the Eluteng adapter with my Pi 4 yet. I’ll let you know when I do.
Brief Pi 3B+ test:
I did run your benchmark twice this evening with my Pi 3B+ with a 240 GB ADATA SU800 SSD. Once was with a Rosewill USB 3.0 SATA drive enclosure, scoring 2892. And once with the Eluteng, scoring 2632.
The drive hosts a “lived in” Raspbian Buster Desktop image. Both /root and /boot are on the drive and I never did anything special to tell the Pi 3B+ to boot from the SSD. …no sd card in the slot.
The Rosewill enclosure is listed by lsusb -v as SimpleTech JMicron USB to ATA/ATAPI Bridge. I’ve had that a few years. It’s been working fine on the Pi 3B+.
That drive in that enclosure did not work well on the Pi 4. The drive wouldn’t stay engaged long enough to set up. The warning that the drive had been disconnected without unmounting kept coming up rather frequently. Honestly, I think the drive/enclosure had done similar on a usb 3.0 port on Windows 10 occasionally. I look forward to trying the same drive with the Eluteng adapter on my Pi 4.
ADATA SU800 SSD on Pi 4 using the ELUTENG adapter scored 5501 on your benchmark.
That’s the same drive that mentioned in my previous comment, but I created a new partition and used rsync to copy the data from my NEXIN external drive I had set up a week or so ago using your instructions.
The NEXIN 60G external SSD is also using the same chipset as both the Eluteng adapter and the StartTech adapter. I clocked 5090 on that drive this evening prior to switching drives.
I’m just switching because I want the larger drive on the pi 4.
I was able to mount both drives on the pi 4 to transfer the data. I encountered no issues during the entire process.
Correction. KEXIN, not NEXIN in my previous comment.
HansCees
5 years ago
If you want to make backups here and there from sd-card
make backup of sd card on ubuntu host sudo fdisk -l | egrep -i "disk|device" | egrep -v loop # find where the sd card is mounted
sudo dd bs=4M if=/dev/sde of=/home/mememe/PI-images/bananas-201912-rasp+omv.img
shrink backup image of your sd-card wget https://raw.githubusercontent.com/Drewsif/PiShrink/master/pishrink.sh
sudo ./pishrink.sh bananas-201912-rasp.img bananas-201912-rasp-shrunk.img
also, the image will automagically expand itsself to all space on a new bigger sd-card
Zhong
5 years ago
Hi, how should I do the steps again, if I have already changed the /boot/cmdline.txt ?
I am trying to boot with seagate hdd. I think maybe I put the wrong partuuid in the /boot/cmdline.txt
If you created a backup copy of /boot/cmdline.txt, I would put your sd card in a reader on a pc and revert to the original file.
Then, I would think the PI would boot using the original /root on the sd card. This would give you opportunity to inspect the partuuid of the hard drive using James’ suggestions, and then adjust /boot/cmdline.txt correctly.
If you had not kept a copy of the original /boot/cmdline.txt file, there may be ways to get through, but as James had suggested, you might do better to just start over.
Just my thoughts. I’m not the author of this post.
ciB
5 years ago
I need a little help.
I flashed everything as described, edited the files accordingly, but now I cant ssh into my pi after it supposedly booted from the ssd. The ssh file exists on the ssd though.
Could there be another reason why it does not work correctly? I did it once already and it worked fine, but I corrupted my fs on the ssd. I simply reflashed the ssd, changed the id again etc. But it does not seem to work. Any ideas?
Ciaran Baulig
5 years ago
I followed your guide (for the 2nd time now), but this time I had no success. After editing the PARTUUID and rebooting, my pi does not boot and I cannot ping it. When I repower the pi, I then can finally ping it again but I cannot ssh into it (now supposedly running of the SSD) anymore. I checked my SSD and the ‘ssh’ file is still on the drive (which should be removed after first boot, right?) Any suggestions what I could/should try otherwise?
I followed your guide and had the same problem as the poster above me: I ensured that the ssh file was located in both the SD card and the USB drive. After editing the PARTUUID and rebooting, I can no longer SSH into the pi. It responds to pings, so I know it’s on, but the ssh server is not running. When I checked contents the USB drive, I can confirm that the ssh file is still there, so it looks like its booting, but not checking the ssh file from the USB drive in order to enable SSH?
Any ideas what I can do about this other than not use headless mode?
Hi, Thanks for this very informative site.
I have set up a raspberry pi 4, running raspbian, as a desktop system using a 500GB WS Blue SSD.
I have run the performance benchmark several times for both a BENFEI adapter, which only runs with “quirks” (it uses a JMicron chipset) and also a Startech adapter, which runs without “quirks”.
Surprisingly, the results for the Startech adapter are considerably slower (20% or more) for all tests, except to the “FIO” test, where the Startech adapter is several HUNDRED percent faster than the BENFEI adapter. The Starteck gives an overall score of around 5800, while the BENFEI gives a score of around 5200.
Do these results make sense? Why do the “FIO” tests give such different results from the rest?
Any help in understanding these results would be appreciated.
Regards,
Jon
I used the Orico transparent enclosure, which was really slow without applying quirks. After I applied Quircks it worked fine and the response of my rPI4 has improved compared to the SD card
First, James, thank you so much for this post! Very helpful!
Just a headsup, I was just about to purchase the ELUTENG adapter, currently third in the list of known good adapters. Reading user reviews on Amazon, I ran across a review that said the adapter used to work great for booting PIs, but they’ve changed the adapter. The new one with the blue connector doesn’t work with PIs.
So, I placed my order for the first one in the list instead.
James, maybe we should skip what I just said about the ELUTENG adapter.
The review I was referring to didn’t specify which PI model and didn’t specify whether they were truly “booting” from ssd or the sd card.
Another person left a comment on that review that read “I purchased one of these before reading this review. It has a blue connector, but when I plug it into my USB 3.0 port on my Raspberry Pi 4, it works just fine. dd speeds are 326MB/sec reads and 346MB/sec writes to some Samsung SSD I had lying around. So maybe they manufacturer has changed things again and now it works fine?”
So, maybe I’ll give the ELUTENG adapter a try.
Hey Jim,
Thanks for the info! Recently 0x7878 said their Sabrent adapter was working too but he hasn’t replied back when I asked him to confirm using findmnt.
With all of the kernel and firmware fixes that the Pi keeps getting for USB and UAS I suspect all of these adapters will probably work at some point (even if it’s a workaround they do in the kernel, like automatically applying quirks for certain models).
Let me know if you try the Eluteng and what you find so we can pool everyone’s information together and continue to draw some conclusions about which adapters work the best!
James, my Eluteng adapter arrived and I can confirm it reports the exact same chipset that you shared from your StarTech adapter.
I haven’t tried the Eluteng adapter with my Pi 4 yet. I’ll let you know when I do.
Brief Pi 3B+ test:
I did run your benchmark twice this evening with my Pi 3B+ with a 240 GB ADATA SU800 SSD. Once was with a Rosewill USB 3.0 SATA drive enclosure, scoring 2892. And once with the Eluteng, scoring 2632.
The drive hosts a “lived in” Raspbian Buster Desktop image. Both /root and /boot are on the drive and I never did anything special to tell the Pi 3B+ to boot from the SSD. …no sd card in the slot.
The Rosewill enclosure is listed by lsusb -v as SimpleTech JMicron USB to ATA/ATAPI Bridge. I’ve had that a few years. It’s been working fine on the Pi 3B+.
That drive in that enclosure did not work well on the Pi 4. The drive wouldn’t stay engaged long enough to set up. The warning that the drive had been disconnected without unmounting kept coming up rather frequently. Honestly, I think the drive/enclosure had done similar on a usb 3.0 port on Windows 10 occasionally. I look forward to trying the same drive with the Eluteng adapter on my Pi 4.
ADATA SU800 SSD on Pi 4 using the ELUTENG adapter scored 5501 on your benchmark.
That’s the same drive that mentioned in my previous comment, but I created a new partition and used rsync to copy the data from my NEXIN external drive I had set up a week or so ago using your instructions.
The NEXIN 60G external SSD is also using the same chipset as both the Eluteng adapter and the StartTech adapter. I clocked 5090 on that drive this evening prior to switching drives.
I’m just switching because I want the larger drive on the pi 4.
I was able to mount both drives on the pi 4 to transfer the data. I encountered no issues during the entire process.
Correction. KEXIN, not NEXIN in my previous comment.
If you want to make backups here and there from sd-card
make backup of sd card on ubuntu host
sudo fdisk -l | egrep -i "disk|device" | egrep -v loop # find where the sd card is mountedsudo dd bs=4M if=/dev/sde of=/home/mememe/PI-images/bananas-201912-rasp+omv.img
shrink backup image of your sd-card
wget https://raw.githubusercontent.com/Drewsif/PiShrink/master/pishrink.shsudo ./pishrink.sh bananas-201912-rasp.img bananas-201912-rasp-shrunk.img
also, the image will automagically expand itsself to all space on a new bigger sd-card
Hi, how should I do the steps again, if I have already changed the /boot/cmdline.txt ?
I am trying to boot with seagate hdd. I think maybe I put the wrong partuuid in the /boot/cmdline.txt
Zhong,
If you created a backup copy of /boot/cmdline.txt, I would put your sd card in a reader on a pc and revert to the original file.
Then, I would think the PI would boot using the original /root on the sd card. This would give you opportunity to inspect the partuuid of the hard drive using James’ suggestions, and then adjust /boot/cmdline.txt correctly.
If you had not kept a copy of the original /boot/cmdline.txt file, there may be ways to get through, but as James had suggested, you might do better to just start over.
Just my thoughts. I’m not the author of this post.
I need a little help.
I flashed everything as described, edited the files accordingly, but now I cant ssh into my pi after it supposedly booted from the ssd. The ssh file exists on the ssd though.
Could there be another reason why it does not work correctly? I did it once already and it worked fine, but I corrupted my fs on the ssd. I simply reflashed the ssd, changed the id again etc. But it does not seem to work. Any ideas?
I followed your guide (for the 2nd time now), but this time I had no success. After editing the PARTUUID and rebooting, my pi does not boot and I cannot ping it. When I repower the pi, I then can finally ping it again but I cannot ssh into it (now supposedly running of the SSD) anymore. I checked my SSD and the ‘ssh’ file is still on the drive (which should be removed after first boot, right?) Any suggestions what I could/should try otherwise?
Hey Ciaran,
Make sure the ssh file is on the SD card as well (both places)!
Hi James –
I followed your guide and had the same problem as the poster above me: I ensured that the ssh file was located in both the SD card and the USB drive. After editing the PARTUUID and rebooting, I can no longer SSH into the pi. It responds to pings, so I know it’s on, but the ssh server is not running. When I checked contents the USB drive, I can confirm that the ssh file is still there, so it looks like its booting, but not checking the ssh file from the USB drive in order to enable SSH?
Any ideas what I can do about this other than not use headless mode?
Hey Danny,
Try recreating the one on the SD card. The SD card is still used as the bootloader so I believe it is looking there!
Hi James –
This worked! I can’t believe I didn’t think of that, but thank you so much for the guide and for the help! Happy Holidays!
Hey Danny,
Glad to hear it, happy holidays to you as well!