[SOLVED] touch: cannot touch 'test': Read-only file system

avdb · n00b Joined: 16 Aug 2020 Posts: 65 Location: Netherlands

My installation has been stable for a few months now, but this week things started going wrong. I turn on my PC, start doing my work, something weird happens and all of a sudden my root partition becomes read-only.
Any clue how I can fix this or what the cause might be?

eccerr0r · Posted: Sat Dec 05, 2020 10:20 pm Post subject:

This is typical when a hard drive fails a critical transaction, the computer then panics as it can no longer guarantee ordering correctness when writing to disk, and thus shuts off writes (read only) to preserve disk integrity or whatever's left of it.

Check 'dmesg' to ensure you don't see disk failures and chances are you may need to look into replacing the disk. It's also possible it's just a transient failure and a simple fsck will repair the inconsistency, but with most modern journaling filesystems, this shouldn't happen.
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Intel Core i7 2700K/Radeon R7 250/24GB DDR3/256GB SSD
What am I supposed watching?

avdb · n00b Joined: 16 Aug 2020 Posts: 65 Location: Netherlands

Here's the dmesg output, nothing suspicious: https://dpaste.com/HNPT3Z58A
except for:

eccerr0r · Posted: Sun Dec 06, 2020 7:57 pm Post subject:

Well, the trick is you need to look at the dmesg after the time you see the failure, your dpaste is 2 minutes worth, and your failure is after 15 minutes. Unfortunately this means you save it to disk so you'll need to maybe mount another USB memory stick or external hard drive, ssh and copy it to another machine perhaps, or temporarily use ramdisk to load up a web browser to post.

I still think btrfs isn't ready for primetime and fear that there may still be bugs that you're running into, you might need to do a deep down check on btrfs to ensure you have any inconsistencies in it (check it despite any journalling).
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Intel Core i7 2700K/Radeon R7 250/24GB DDR3/256GB SSD
What am I supposed watching?

avdb · n00b Joined: 16 Aug 2020 Posts: 65 Location: Netherlands

I think some external software not installed with Portage is the cause. I tried to play around on my system to see for how long I can use it without the bug and I think I have figured out the cause. It's been begging me to update it around the same time the bug started so I hope that'll fix it.

eccerr0r · Posted: Mon Dec 07, 2020 4:12 pm Post subject:

The computer should never go read only due to a user mode program. Heck you cannot remount a partition readonly if there are any programs trying to write to the disk - it only does it if the kernel feels unsafe...

Whether some program is doing something to trigger the bug is another story - but this means there's a bug.
_________________
Intel Core i7 2700K/Radeon R7 250/24GB DDR3/256GB SSD
What am I supposed watching?