mounted loopback device suddendly become read only

Discussion in 'Server Operation' started by thierrybo, Oct 23, 2012.

  1. thierrybo

    thierrybo New Member

    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.
     
  2. falko

    falko Super Moderator ISPConfig Developer

    Are there any errors in your logs?
     
  3. thierrybo

    thierrybo New Member

    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
     
  4. falko

    falko Super Moderator ISPConfig Developer

    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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