New: ext4 : "No space left on the device" persists even when I deleted more than 40GB of data
https://bugzilla.kernel.org/show_bug.cgi?id=31542
Summary: ext4 : "No space left on the device" persists even
when I deleted more than 40GB of data
Product: File System
Version: 2.5
Kernel Version: 2.6.37.2
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: high
Priority: P1
Component: ext4
AssignedTo: [email protected]
ReportedBy: [email protected]
Regression: No
1.) I recently filled my data partition full and got an error dialog, that there's no space left on the device (Resume, Retry, Skip, Abort, ... don't remember exactly)
2.) I used different terminal in order to move some of the big files (more than 40GB in total) from the affected partition to a different harddrive. But df was still showing 0 bytes available.
3.) Even of that I tried to resume the copying mentioned in point 1.) and it worked ... the copying was finished successfuly. What a magic!
4.) The situation changed after the reboot. I cannot copy new files to the affected partition anymore even if there must be at least 30GB of space left.
This is what df returns:
-------------------------
Filesystem 1K-blocks Used Available Use% Mounted on/dev/md6 1209519868 1175334268 0 100% /mnt/data
The difference between total and used blocks gives more than 32GB and I'm sure that yesterday this space was filled with data.
I'm willing to do any non-destructive tests and collect any debug logs You need in order to find the root cause of this issue.
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[Bug 31542] ext4 : "No space left on the device" persists even when I deleted more than 40GB of data
https://bugzilla.kernel.org/show_bug.cgi?id=31542
--- Comment #1 from Jaromír Cápík <[email protected]> 2011-03-20 23:27:10 --- NOTE : Unfortunately I was performing the mentioned scenario on Mandriva Linux with the latest Mandriva desktop kernel [2.6.33-7mnb2] (and I know You don't like non-Vanilla kernels even if they almost don't differ from Vanilla), but I truly believe, that this problem comes from the mainline and therefore it's present in the mainline too.
The issue persists even when I try Vanilla 2.6.37.2 ...
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[Bug 31542] ext4 : "No space left on the device" persists even when I deleted more than 40GB of data
In reply to [email protected]https://bugzilla.kernel.org/show_bug.cgi?id=31542
--- Comment #2 from Jaromír Cápík <[email protected]> 2011-03-20 23:39:36 --- I just discovered, that I get "no space left" messages from user accounts only. The root account can fill the rest of the space without sign of problems ....
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[Bug 31542] ext4 : "No space left on the device" persists even when I deleted more than 40GB of data
In reply to [email protected]https://bugzilla.kernel.org/show_bug.cgi?id=31542
--- Comment #3 from Jaromír Cápík <[email protected]> 2011-03-20 23:43:56 --- Sorry ... this seems to be a feature I didn't know about ...
-> By default, 5% of the space on a filesystem is reserved for the root user. This is so that if the filesystem fills up, there's still a little space for root to come in and clean up the mess. You can change this percentage with the -m option of tune2fs; do not do this while the filesystem is mounted and read the manpage very carefully. This is a potentially dangerous operation.
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[Bug 31542] ext4 : "No space left on the device" persists even when I deleted more than 40GB of data
In reply to [email protected]https://bugzilla.kernel.org/show_bug.cgi?id=31542
Jaromír Cápík <[email protected]> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |INVALIDSignature · 6 lines
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[Bug 31542] ext4 : "No space left on the device" persists even when I deleted more than 40GB of data
In reply to [email protected]https://bugzilla.kernel.org/show_bug.cgi?id=31542
Eric Sandeen <[email protected]> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |[email protected]
--- Comment #4 from Eric Sandeen <[email protected]> 2011-03-20 23:46:18 --- That's right, you've run into the reserved-for-root space, which as you noted above, can be changed...
So CLOSED/NOTABUG I think?
-Eric
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[Bug 31542] ext4 : "No space left on the device" persists even when I deleted more than 40GB of data
In reply to [email protected]https://bugzilla.kernel.org/show_bug.cgi?id=31542
Jaromír Cápík <[email protected]> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |CLOSED
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[Bug 31542] ext4 : "No space left on the device" persists even when I deleted more than 40GB of data
In reply to [email protected]https://bugzilla.kernel.org/show_bug.cgi?id=31542
--- Comment #5 from Jaromír Cápík <[email protected]> 2011-03-21 00:05:16 --- Yep .... I've already resolved/closed.
But ... that points to the unintuitive df output, where the reserved part should be displayed. At the moment I don't know if that's easily possible, but I'll check that and create an enhancement ticket if so.
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