Problems using an externe SSD M2 for backups with encryption

English Hardware
1

Hi,

I want to use an external SSD (NVMe) for backups with rsync. I want the backup to be encrypted. This is causing more problems than I expected.

I tried it several times with different setups. I formated the ssd with the Yast2-Partitioner. I tried ext4, btrfs und xfs. No problems.

I started the backup process with rsync. Sometimes, the process stops after a few seconds with “broken pipe” and a read-only device. Sometimes it stops when I look into the filesystem with dolphin (dolphin freezes). With ext4 the backups process was very slow. It stops very often for a few moments. I have read that this could be a problem with the journal (commit).

Just now, I tried a backup with ext4 (without encryption), same problem. When I look into a directory everything freeze again. rsync stops (without exit).

When reconnecting the ssd to the computer I am not able to mount the ssd again:

Beim Zugriff auf „953,8 GiB Wechselmedium“ ist ein Fehler aufgetreten, die Meldung lautet: Ein nicht genauer angegebener Fehler ist aufgetreten: Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken.

I tried a different usb-cabel. Maybe the external m.2-body is defect?

Thanks for all hints
Kay

2

I tried to create a backup with robocopy (Windows 10 in a VM (VMWare)), no problems. I’m not sure this is a hardware problem.

Maybe a problem with rsync? I use the following command:

rsync -avh --delete --info=progress2 /mnt/Daten/digikam /run/media/kay/Volume/
3

I doubt that very much. rsync is just an application program that in the end only does read and write commands for which it uses the kernel. I assume it must be something “below” it. Like kernel or hardware (as you already tried to attack o the hardware level).

4

How do you mount your external drive to /run/media/kay/Volume/?

5

On the same physical SSD?

Show the full output of dmesg after the problem happens. Upload to the https://paste.opensue.org/

6

Via KDE or Dolphin. It mounts the SSD automatically.

Yes.

I get the same error as above when I connect the ssd now with NTFS. No error messages in dmesg.

When I try to start the Yast2-Partitioner I get the following error messages:
https://paste.opensuse.org/pastes/4c6ca0add8d9

Now, I will format the disk with ext4 and try to reproduce the error with rsync.

7

You said “NVMe” and the log is full of USB errors. Are you sure you are working with the correct device?

8

So, here is the full log.

https://paste.opensuse.org/pastes/0757381cf960

rsync ended with

         39,74G  85%  835,48kB/s    2:09:11  rsync: [receiver] write failed on "/run/media/kay/ffcd48be-e0e8-418a-ba1e-0606990f2d2f/digikam/2008/09/21/DSCF0179.jpeg": Read-only file system (30)
rsync error: error in file IO (code 11) at receiver.c(381) [receiver=3.4.1]

rsync: [sender] write error: Broken pipe (32)

So, I’m not sure, what you mean. The SSD (m.2) is the original ssd from my notebook in an external usb-box. It is connected via USB-C.

I already ordered a new external usb-box. It will arrive on monday or tuesday.

9

The errors are the same.

Which you never mentioned before.

And when you used it with Windows - did you also use it in the external USB box?

10

Sorry, I wrote “external SSD”. Is there another way to connect other than USB? Yes, it is the same way. I only start VMWare and connect the SSD to the Windows-VM.

11

Try usb-storage instead of uas.

12

I tried to switch to usb-storage but the temporal solution doesn’t. When trying to remove the kernel module usb-storage I get the following error:

> sudo rmmod usb-storage                                               
rmmod: ERROR: Module usb_storage is in use by:rmmod: ERROR:  uasrmmod: ERROR:

Before trying the permanent solution I wait for the new external box.

13

It seems to have been a problem with this ugreen device. I ordered the same type again and had the same problems. With a different device (from a different manufacturer), I no longer have any problems.

14

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