Messages in this thread | | | Date | Tue, 28 Dec 2010 11:41:53 +0100 | From | torn5 <> | Subject | Re: Regular ext4 error warning with HD in USB dock |
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On 12/28/2010 03:53 AM, Ted Ts'o wrote: > On Tue, Dec 28, 2010 at 09:53:45AM +1100, Con Kolivas wrote: > >> Since I moved my internal HD into a USB dock externally and mount the ext4 >> filesystem on it, I regularly get the following errors after it has been >> mounted for a while (see timecode). It doesn't seem to matter which recent >> kernel I use. >> >> [1048401.773270] EXT4-fs (sde8): mounted filesystem with writeback data mode. >> Opts: (null) >> [1048702.736011] EXT4-fs (sde8): error count: 3 >> [1048702.736016] EXT4-fs (sde8): initial error at 1289053677: >> ext4_journal_start_sb:251 >> [1048702.736018] EXT4-fs (sde8): last error at 1289080948: ext4_put_super:719 >> > That's actually not an error. It's a report which is generated every > 24 hours, indicating that there has been 3 errors since the last time > the error count has been cleared, with the first error taking place at > Sat Nov 6 10:27:57 2010 (US/Eastern) in the function > ext4_journal_start_sb(), at line 251, and the most recent error taking > place at Sat Nov 6 18:02:28 2010 (US/Eastern), in the function > ext4_put_super() at line 719. This is a new feature which was added > in 2.6.36. >
This is going to be a faq... I suppose the datetime is encoded (what format is that?) in that long number after "at". May I suggest the datetime gets decoded in the printing? Also may I suggest that the error happens immediately after mount and not after 300 seconds from mount?
I just subscribed to this list exactly to report the same kind of error.
Last week I was doing reliability tests for open-iscsi and this error drove me crazy. I spent days in tests where I thought I could reproduce an error in open-iscsi by disconnecting and reconnecting the network; I even reported this to the open-iscsi mailing list, but in fact it was an old error of the filesystem and it was not getting cleared by my older e2fsck 1.41.11 .
If that happened immediately after mount or if it spitted the datetime in human readable format, I would have immediately guessed it was due to an existing "filesystem problem" (even though I was running fsck.ext4 -f prior to each mount) but instead I thought it was due to my 5 minutes of "networks disconnection tests" I was doing after each mount. DOH!
Anyway thanks for your work: excellent filesystem.
PS: I have a question for you regarding ext4 behaviour with SCSI commands resubmissions... ok I am opening another thread for that.
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