[SOLVED] Weird freezes when trying to write files to a SSD

yelopanda · 2024-05-27 02:32:59

Hello, I have a SSD that was encrypted via cryptsetup (LUKS) a while back, it was working fine until recently. Now when trying to copy files, it goes smoothly for a few seconds then gets stuck for about an minute, and it keeps happening over and over again until the file is transferred.

When the copying freezes, the IO read/write stops (on iotop) and the CPU usage also goes down, but the physical IO indicator on my CPU stays on. I have tried to diagnose the problem by myself but have failed. Any help regarding this will be appreciated.

Thank You.

Last edited by yelopanda (2024-05-28 08:04:17)

256 · 2024-05-27 14:18:21

Are you sure encryption is relevant? Try doing "dd if=/dev/sdx of=/dev/null status=progress", replacing "sdx" with the SSD, to test whether this problem is more low-level (also, I'm pretty sure it should be unmounted when you do this).

Also, is it reads, writes, or both? If it's only writing that's a problem, the above command would probably be a waste of time.

yelopanda · 2024-05-27 14:29:56

Reading from disk using dd is going smoothly, only while writing something to the disk I am facing this problem.

AaAaAAaaAAaARCH · 2024-05-28 03:24:07

SSD performance can degrade depending on how "full" the drive is and what kind of SSD technology is used. In your case TRIM might not be enabled by default https://wiki.archlinux.org/title/Dm-cry … ives_(SSD)

yelopanda · 2024-05-28 03:56:33

The drive is about ~90 percent full, I think this is the reason.

Edit: I just cleared 10 percent more space and the problem remains.

Last edited by yelopanda (2024-05-28 04:02:26)

AaAaAAaaAAaARCH · 2024-05-28 04:07:19

Without TRIM the data you deleted is still claimed by LUKS, so it would still be "full"

yelopanda · 2024-05-28 04:31:25

Oh sorry, forgot about that. After TRIM, data is being written to the drive with expected speeds.

For people with the same problem:
Make sure that your SSD supports TRIM first.

Mount the drive via this command to enable TRIM -

sudo cryptsetup --allow-discards open /dev/sdX ssdcrypt

/dev/sdX is your drive and ssdcrypt is the name of the mapper.

Then mount the drive, e.g. -

sudo mount /dev/mapper/ssdcrypt /mnt

After that run the fstrim command on the mount point-

sudo fstrim -v /mnt

Last edited by yelopanda (2024-05-28 04:32:25)

seth · 2024-05-28 06:32:10

\o/
Please always remember to mark resolved threads by editing your initial posts subject - so others will know that there's no task left, but maybe a solution to find.
Thanks.

Edit: you might also want to adjust teh subject to reflect that this wasn'rt luks related at all but about your full SSD

Last edited by seth (2024-05-28 06:33:04)

yelopanda · 2024-05-28 06:36:48

seth wrote:

\o/
Please always remember to mark resolved threads by editing your initial posts subject - so others will know that there's no task left, but maybe a solution to find.
Thanks.
Edit: you might also want to adjust teh subject to reflect that this wasn'rt luks related at all but about your full SSD

done

Arch Linux

#1 2024-05-27 02:32:59

[SOLVED] Weird freezes when trying to write files to a SSD

#2 2024-05-27 14:18:21

Re: [SOLVED] Weird freezes when trying to write files to a SSD

#3 2024-05-27 14:29:56

Re: [SOLVED] Weird freezes when trying to write files to a SSD

#4 2024-05-28 03:24:07

Re: [SOLVED] Weird freezes when trying to write files to a SSD

#5 2024-05-28 03:56:33

Re: [SOLVED] Weird freezes when trying to write files to a SSD

#6 2024-05-28 04:07:19

Re: [SOLVED] Weird freezes when trying to write files to a SSD

#7 2024-05-28 04:31:25

Re: [SOLVED] Weird freezes when trying to write files to a SSD

#8 2024-05-28 06:32:10

Re: [SOLVED] Weird freezes when trying to write files to a SSD

#9 2024-05-28 06:36:48

Re: [SOLVED] Weird freezes when trying to write files to a SSD

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