Public bug reported:
Runnng 12.04 LTS, upgraded from 12.04 Beta2, from 11.10 LTS. Run daily
updates, including Proposed.
Starting May 1st, my system occasionally boots into, or crashes into, a
readonly filesystem, as reported by trying to do something in bash or
saving a file in the gui, eg. gedit.
Example, earlier today the desktop hung for a minute or two (while using
Firefox Aurora 14.0a2). When it resumed, the filesystem was readonly.
Restarting the system fixed this instance.
Possible related issue: This system has always sometimes shutdown
incompletely even running very stably under 11.10 LTS, eg. the shutdown
image occasionally stops with the last two dots in the sequence staying
white. However, the booting into a readonly filesystem only started on
May 1st.
Sorry for the incomplete/rambling-style bug report, but this issue has
become annoying and I usually find if I run into a problem lots of other
folks will too. I'll happily provide whatever log fragments etc as asked
for.
Looking at syslog and kern.log might it be affiliated with this msg: Buffer I/O
error on device sr0 ?
Or as a result of errors=remount-ro?
May 2 13:58:15 Barbados kernel: [ 25.257718] EXT4-fs (sda1): re-mounted.
Opts: errors=remount-ro
Possibles?
>From syslog:
May 4 10:52:20 Barbados kernel: [ 4.538229] Buffer I/O error on device sr0,
logical block 16384
May 4 10:52:20 Barbados kernel: [ 4.574356] sr 5:0:1:0: [sr0] Result:
hostbyte=DID_OK driverbyte=DRIVER_SENSE
May 4 10:52:20 Barbados kernel: [ 4.574362] sr 5:0:1:0: [sr0] Sense Key :
Illegal Request [current]
May 4 10:52:20 Barbados kernel: [ 4.574366] sr 5:0:1:0: [sr0] Add. Sense:
Read of scrambled sector without authentication
May 4 10:52:20 Barbados kernel: [ 4.574374] sr 5:0:1:0: [sr0] CDB:
Read(10): 28 00 00 00 80 00 00 00 02 00
May 4 10:52:20 Barbados kernel: [ 4.574381] end_request: I/O error, dev
sr0, sector 131072
May 4 10:52:20 Barbados kernel: [ 4.574385] Buffer I/O error on device sr0,
logical block 16384
May 4 10:52:20 Barbados kernel: [ 9.767262] EXT4-fs (sda1): INFO: recovery
required on readonly filesystem
May 4 10:52:20 Barbados kernel: [ 9.767266] EXT4-fs (sda1): write access
will be enabled during recovery
>From kern.log:
May 2 16:30:59 Barbados kernel: [ 296.679080] ata1.00: exception Emask 0x50
SAct 0x6 SErr 0x400800 action 0x6 frozen
May 2 16:30:59 Barbados kernel: [ 296.679092] ata1.00: irq_stat 0x08000000,
interface fatal error
May 2 16:30:59 Barbados kernel: [ 296.679101] ata1: SError: { HostInt Handshk
}
May 2 16:30:59 Barbados kernel: [ 296.679109] ata1.00: failed command: WRITE
FPDMA QUEUED
May 2 16:30:59 Barbados kernel: [ 296.679124] ata1.00: cmd
61/c0:08:28:82:6d/02:00:02:00:00/40 tag 1 ncq 360448 out
May 2 16:30:59 Barbados kernel: [ 296.679127] res
40/00:10:40:95:cb/00:00:04:00:00/40 Emask 0x50 (ATA bus error)
May 2 16:30:59 Barbados kernel: [ 296.679245] ata1.00: status: { DRDY }
** Affects: ubuntu
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/994708
Title:
Intermittent boot-to/crash-to read-only file system 12.04
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