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-   -   mounted loopback device suddendly become read only (http://www.howtoforge.com/forums/showthread.php?t=59217)

thierrybo 23rd October 2012 21:23

mounted loopback device suddendly become read only
 
Hi,

I have a "strange" problem. I use an usb disk connected to my nas to make backups. I use backintime (rsync) and to use hard links to save disk space, I created a "sparse" file on this usb disk. Then I mount it as ext4 on loopback device.

I can browse this sparse file (as root) and create files.

However each time I run the backup job, after a couple of minutes, rsync outputs errors messages because the filesystem is read only. For some unexplained reason, the filesystem switch from rw to ro after writing some files on it. I can't see any reason for that. The drive is empty, 500 Mb, and the only file is the spare file (490 Mb) withe 6Mb used.

falko 24th October 2012 20:26

Are there any errors in your logs?

thierrybo 24th October 2012 22:14

yes :

Code:

Oct 23 21:48:16 thierrybo-Aspire-7540 backintime (root): INFO: Lock
Oct 23 21:48:16 thierrybo-Aspire-7540 backintime (root): INFO: on process begins
Oct 23 21:48:16 thierrybo-Aspire-7540 backintime (root): INFO: [GnomePlugin.Systray.run]
Oct 23 21:48:16 thierrybo-Aspire-7540 backintime (root): INFO: [GnomePlugin.Systray.run] begin loop
Oct 23 21:48:16 thierrybo-Aspire-7540 backintime (root): INFO: Profile_id: 2
Oct 23 21:48:16 thierrybo-Aspire-7540 backintime (root): INFO: Compare with old snapshot: 20121022-210811-374
Oct 23 21:48:17 thierrybo-Aspire-7540 backintime (root): INFO: Command "rsync -rtDH --links --no-p --no-g --no-o  --delete --delete-excluded  -i --dry-run --out-format="BACKINTIME: %i %n%L" --chmod=Du+wx  --exclude="/media/BACKUP" --exclude="/root/.local/share/backintime" --include="/etc/" --include="/root/" --exclude=".gvfs" --exclude=".cache*" --exclude="[Cc]ache*" --exclude=".thumbnails*" --exclude="[Tt]rash*" --exclude="*.backup*" --exclude="*~" --exclude="/root/Ubuntu One" --exclude=".dropbox*" --include="/etc/fstab" --include="/etc/fuse.conf" --include="/root/**" --exclude="*" / "/media/BACKUP/backintime/thierrybo-Aspire-7540/root/2/20121022-210811-374/backup/"" returns 0
Oct 23 21:48:17 thierrybo-Aspire-7540 backintime (root): INFO: Create hard-links
Oct 23 21:48:17 thierrybo-Aspire-7540 backintime (root): INFO: Command "find "/media/BACKUP/backintime/thierrybo-Aspire-7540/root/2/20121022-210811-374/backup/" -type d -exec chmod u+wx {} \;" returns 0
Oct 23 21:48:17 thierrybo-Aspire-7540 backintime (root): INFO: Command "cp -aRl "/media/BACKUP/backintime/thierrybo-Aspire-7540/root/2/20121022-210811-374/backup/"* "/media/BACKUP/backintime/thierrybo-Aspire-7540/root/2/new_snapshot/backup/"" returns 0
Oct 23 21:48:17 thierrybo-Aspire-7540 backintime (root): INFO: Command "find "/media/BACKUP/backintime/thierrybo-Aspire-7540/root/2/20121022-210811-374/backup/" -type d -exec chmod a-w {} \;" returns 0
Oct 23 21:48:17 thierrybo-Aspire-7540 backintime (root): INFO: Command "chmod -R a+w "/media/BACKUP/backintime/thierrybo-Aspire-7540/root/2/new_snapshot"" returns 0
Oct 23 21:48:17 thierrybo-Aspire-7540 backintime (root): INFO: Call rsync to take the snapshot
Oct 23 21:48:17 thierrybo-Aspire-7540 backintime (root): INFO: Command "rsync -rtDH --links --no-p --no-g --no-o  --delete --delete-excluded  -v  --chmod=Du+wx  --exclude="/media/BACKUP" --exclude="/root/.local/share/backintime" --include="/etc/" --include="/root/" --exclude=".gvfs" --exclude=".cache*" --exclude="[Cc]ache*" --exclude=".thumbnails*" --exclude="[Tt]rash*" --exclude="*.backup*" --exclude="*~" --exclude="/root/Ubuntu One" --exclude=".dropbox*" --include="/etc/fstab" --include="/etc/fuse.conf" --include="/root/**" --exclude="*" / "/media/BACKUP/backintime/thierrybo-Aspire-7540/root/2/new_snapshot/backup/" 2>&1" returns 0
Oct 23 21:48:17 thierrybo-Aspire-7540 backintime (root): INFO: Save config file
Oct 23 21:48:17 thierrybo-Aspire-7540 backintime (root): INFO: Command "cp /root/.config/backintime/config /media/BACKUP/backintime/thierrybo-Aspire-7540/root/2/new_snapshot/backup/.." returns 0
Oct 23 21:48:17 thierrybo-Aspire-7540 backintime (root): INFO: Save permissions
Oct 23 21:48:17 thierrybo-Aspire-7540 backintime (root): INFO: Create info file
Oct 23 21:48:17 thierrybo-Aspire-7540 backintime (root): INFO: Command "chmod -R a-w "/media/BACKUP/backintime/thierrybo-Aspire-7540/root/2/20121023-214816-593/backup"" returns 0
Oct 23 21:48:17 thierrybo-Aspire-7540 backintime (root): INFO: Command "chmod -R a-w "/media/BACKUP/backintime/thierrybo-Aspire-7540/root/2/20121022-210811-374/backup/"" returns 0
Oct 23 21:48:17 thierrybo-Aspire-7540 backintime (root): INFO: Remove backups older than: 20101023-000000
Oct 23 21:48:17 thierrybo-Aspire-7540 backintime (root): INFO: [smart remove] considered: ['20121023-214816-593', '20121022-210811-374']
Oct 23 21:48:17 thierrybo-Aspire-7540 backintime (root): INFO: [smart remove] keep all >= 20121022-000000-168 and < 20121024-000000-321
Oct 23 21:48:17 thierrybo-Aspire-7540 backintime (root): INFO: [smart remove] keep first >= 20121023-000000-811 and < 20121024-000000-356
Oct 23 21:48:17 thierrybo-Aspire-7540 backintime (root): INFO: [smart remove] keep first >= 20121022-000000-633 and < 20121023-000000-675
Oct 23 21:48:17 thierrybo-Aspire-7540 backintime (root): INFO: [smart remove] keep first >= 20121021-000000-970 and < 20121022-000000-634
Oct 23 21:48:17 thierrybo-Aspire-7540 backintime (root): INFO: [smart remove] keep first >= 20121020-000000-233 and < 20121021-000000-869
Oct 23 21:48:17 thierrybo-Aspire-7540 backintime (root): INFO: [smart remove] keep first >= 20121019-000000-524 and < 20121020-000000-777
Oct 23 21:48:17 thierrybo-Aspire-7540 backintime (root): INFO: [smart remove] keep first >= 20121018-000000-920 and < 20121019-000000-422
Oct 23 21:48:17 thierrybo-Aspire-7540 backintime (root): INFO: [smart remove] keep first >= 20121017-000000-699 and < 20121018-000000-984
Oct 23 21:48:17 thierrybo-Aspire-7540 backintime (root): INFO: [smart remove] keep first >= 20121021-000000-296 and < 20121029-000000-173
Oct 23 21:48:17 thierrybo-Aspire-7540 backintime (root): INFO: [smart remove] keep first >= 20121014-000000-265 and < 20121022-000000-170
Oct 23 21:48:17 thierrybo-Aspire-7540 backintime (root): INFO: [smart remove] keep first >= 20121007-000000-803 and < 20121015-000000-199
Oct 23 21:48:17 thierrybo-Aspire-7540 backintime (root): INFO: [smart remove] keep first >= 20120930-000000-644 and < 20121008-000000-377
Oct 23 21:48:17 thierrybo-Aspire-7540 backintime (root): INFO: [smart remove] keep first >= 20121001-000000-756 and < 20121101-000000-728
Oct 23 21:48:17 thierrybo-Aspire-7540 backintime (root): INFO: [smart remove] keep first >= 20120901-000000-520 and < 20121001-000000-282
Oct 23 21:48:17 thierrybo-Aspire-7540 backintime (root): INFO: [smart remove] keep first >= 20120801-000000-354 and < 20120901-000000-243
Oct 23 21:48:17 thierrybo-Aspire-7540 backintime (root): INFO: [smart remove] keep first >= 20120701-000000-406 and < 20120801-000000-884
Oct 23 21:48:17 thierrybo-Aspire-7540 backintime (root): INFO: [smart remove] keep first >= 20120601-000000-836 and < 20120701-000000-491
Oct 23 21:48:17 thierrybo-Aspire-7540 backintime (root): INFO: [smart remove] keep first >= 20120501-000000-509 and < 20120601-000000-713
Oct 23 21:48:17 thierrybo-Aspire-7540 backintime (root): INFO: [smart remove] keep first >= 20120401-000000-598 and < 20120501-000000-795
Oct 23 21:48:17 thierrybo-Aspire-7540 backintime (root): INFO: [smart remove] keep first >= 20120301-000000-310 and < 20120401-000000-345
Oct 23 21:48:17 thierrybo-Aspire-7540 backintime (root): INFO: [smart remove] keep first >= 20120201-000000-659 and < 20120301-000000-771
Oct 23 21:48:17 thierrybo-Aspire-7540 backintime (root): INFO: [smart remove] keep first >= 20120101-000000-387 and < 20120201-000000-994
Oct 23 21:48:17 thierrybo-Aspire-7540 backintime (root): INFO: [smart remove] keep first >= 20111201-000000-107 and < 20120101-000000-117
Oct 23 21:48:17 thierrybo-Aspire-7540 backintime (root): INFO: [smart remove] keep first >= 20111101-000000-358 and < 20111201-000000-229
Oct 23 21:48:17 thierrybo-Aspire-7540 backintime (root): INFO: [smart remove] keep first >= 20111001-000000-772 and < 20111101-000000-145
Oct 23 21:48:17 thierrybo-Aspire-7540 backintime (root): INFO: [smart remove] keep first >= 20110901-000000-913 and < 20111001-000000-776
Oct 23 21:48:17 thierrybo-Aspire-7540 backintime (root): INFO: [smart remove] keep first >= 20110801-000000-801 and < 20110901-000000-149
Oct 23 21:48:17 thierrybo-Aspire-7540 backintime (root): INFO: [smart remove] keep first >= 20110701-000000-983 and < 20110801-000000-443
Oct 23 21:48:17 thierrybo-Aspire-7540 backintime (root): INFO: [smart remove] keep first >= 20110601-000000-474 and < 20110701-000000-726
Oct 23 21:48:17 thierrybo-Aspire-7540 backintime (root): INFO: [smart remove] keep first >= 20110501-000000-131 and < 20110601-000000-639
Oct 23 21:48:17 thierrybo-Aspire-7540 backintime (root): INFO: [smart remove] keep first >= 20110401-000000-722 and < 20110501-000000-677
Oct 23 21:48:17 thierrybo-Aspire-7540 backintime (root): INFO: [smart remove] keep first >= 20110301-000000-933 and < 20110401-000000-277
Oct 23 21:48:17 thierrybo-Aspire-7540 backintime (root): INFO: [smart remove] keep first >= 20110201-000000-549 and < 20110301-000000-145
Oct 23 21:48:17 thierrybo-Aspire-7540 backintime (root): INFO: [smart remove] keep first >= 20110101-000000-657 and < 20110201-000000-271
Oct 23 21:48:17 thierrybo-Aspire-7540 backintime (root): INFO: [smart remove] keep first >= 20101201-000000-917 and < 20110101-000000-387
Oct 23 21:48:17 thierrybo-Aspire-7540 backintime (root): INFO: [smart remove] keep first >= 20101101-000000-575 and < 20101201-000000-457
Oct 23 21:48:17 thierrybo-Aspire-7540 backintime (root): INFO: [smart remove] keep first >= 20120101-000000-334 and < 20130101-000000-240
Oct 23 21:48:17 thierrybo-Aspire-7540 backintime (root): INFO: [smart remove] keep snapshots: ['20121023-214816-593', '20121022-210811-374']
Oct 23 21:48:17 thierrybo-Aspire-7540 backintime (root): INFO: Keep min free disk space: 1024 Mb
Oct 23 21:48:19 thierrybo-Aspire-7540 backintime (root): INFO: [GnomePlugin.Systray.run] end loop
Oct 23 21:48:19 thierrybo-Aspire-7540 backintime (root): INFO: Unlock
Oct 23 21:52:34 thierrybo-Aspire-7540 kernel: [ 9959.392176] EXT4-fs (loop0): error count: 18
Oct 23 21:52:34 thierrybo-Aspire-7540 kernel: [ 9959.392187] EXT4-fs (loop0): initial error at 1350506902: ext4_init_inode_table:1336
Oct 23 21:52:34 thierrybo-Aspire-7540 kernel: [ 9959.392196] EXT4-fs (loop0): last error at 1351021247: ext4_journal_start_sb:296: inode 11665580: block 46670027
Oct 23 21:54:20 thierrybo-Aspire-7540 kernel: [10065.336114] CIFS VFS: No writable handles for inode
Oct 23 21:54:20 thierrybo-Aspire-7540 kernel: [10065.336148] CIFS VFS: No writable handles for inode
Oct 23 21:54:20 thierrybo-Aspire-7540 kernel: [10065.336171] CIFS VFS: No writable handles for inode
Oct 23 21:54:20 thierrybo-Aspire-7540 kernel: [10065.336191] CIFS VFS: No writable handles for inode
Oct 23 21:54:20 thierrybo-Aspire-7540 kernel: [10065.336211] CIFS VFS: No writable handles for inode
Oct 23 21:54:20 thierrybo-Aspire-7540 kernel: [10065.336228] CIFS VFS: No writable handles for inode
Oct 23 21:54:20 thierrybo-Aspire-7540 kernel: [10065.336245] CIFS VFS: No writable handles for inode
Oct 23 21:54:20 thierrybo-Aspire-7540 kernel: [10065.336263] CIFS VFS: No writable handles for inode
Oct 23 21:54:20 thierrybo-Aspire-7540 kernel: [10065.336280] CIFS VFS: No writable handles for inode
Oct 23 21:54:20 thierrybo-Aspire-7540 kernel: [10065.336295] CIFS VFS: No writable handles for inode
Oct 23 21:54:20 thierrybo-Aspire-7540 kernel: [10065.336310] CIFS VFS: No writable handles for inode
Oct 23 21:54:20 thierrybo-Aspire-7540 kernel: [10065.336323] CIFS VFS: No writable handles for inode
Oct 23 21:54:20 thierrybo-Aspire-7540 kernel: [10065.336337] CIFS VFS: No writable handles for inode
Oct 23 21:54:20 thierrybo-Aspire-7540 kernel: [10065.336349] CIFS VFS: No writable handles for inode


falko 25th October 2012 12:09

Quote:

Oct 23 21:52:34 thierrybo-Aspire-7540 kernel: [ 9959.392187] EXT4-fs (loop0): initial error at 1350506902: ext4_init_inode_table:1336
That sounds as if there is a problem with your hard disk (bad sectors or stuff like that). That would explain why it switches to read-only mode.


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