I have been having some issues lately on an older server.....just found
this in dmesg with I realized the file system was read only....

[ 1295.874963] ata4.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
[ 1295.875032] ata4.00: BMDMA stat 0x5
[ 1295.875084] ata4.00: failed command: READ DMA
[ 1295.875139] ata4.00: cmd c8/00:08:08:0b:98/00:00:00:00:00/e3 tag 0 dma
4096 in
[ 1295.875141]          res 51/40:00:0e:0b:98/00:00:00:00:00/e3 Emask 0x9
(media error)
[ 1295.875266] ata4.00: status: { DRDY ERR }
[ 1295.875315] ata4.00: error: { UNC }
[ 1295.896422] ata4.00: configured for UDMA/100
[ 1295.912627] ata4.01: configured for UDMA/133
[ 1295.912645] ata4: EH complete
[ 1299.838082] ata4.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
[ 1299.838142] ata4.00: BMDMA stat 0x5
[ 1299.838192] ata4.00: failed command: READ DMA
[ 1299.838248] ata4.00: cmd c8/00:08:08:0b:98/00:00:00:00:00/e3 tag 0 dma
4096 in
[ 1299.838250]          res 51/40:00:0e:0b:98/00:00:00:00:00/e3 Emask 0x9
(media error)
[ 1299.838375] ata4.00: status: { DRDY ERR }
[ 1299.838424] ata4.00: error: { UNC }
[ 1299.860448] ata4.00: configured for UDMA/100
[ 1299.876673] ata4.01: configured for UDMA/133
[ 1299.876696] ata4: EH complete
[ 1303.856909] ata4.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
[ 1303.856967] ata4.00: BMDMA stat 0x5
[ 1303.857018] ata4.00: failed command: READ DMA
[ 1303.857074] ata4.00: cmd c8/00:08:08:0b:98/00:00:00:00:00/e3 tag 0 dma
4096 in
[ 1303.857076]          res 51/40:00:0e:0b:98/00:00:00:00:00/e3 Emask 0x9
(media error)
[ 1303.857201] ata4.00: status: { DRDY ERR }
[ 1303.857250] ata4.00: error: { UNC }
[ 1303.880448] ata4.00: configured for UDMA/100
[ 1303.896764] ata4.01: configured for UDMA/133
[ 1303.896786] ata4: EH complete
[ 1307.865671] ata4.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
[ 1307.865730] ata4.00: BMDMA stat 0x5
[ 1307.865781] ata4.00: failed command: READ DMA
[ 1307.865836] ata4.00: cmd c8/00:08:08:0b:98/00:00:00:00:00/e3 tag 0 dma
4096 in
[ 1307.865838]          res 51/40:00:0e:0b:98/00:00:00:00:00/e3 Emask 0x9
(media error)
[ 1307.865962] ata4.00: status: { DRDY ERR }
[ 1307.866011] ata4.00: error: { UNC }
[ 1307.888427] ata4.00: configured for UDMA/100
[ 1307.904843] ata4.01: configured for UDMA/133
[ 1307.904866] ata4: EH complete
[ 1311.791898] ata4.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
[ 1311.791957] ata4.00: BMDMA stat 0x5
[ 1311.792018] ata4.00: failed command: READ DMA
[ 1311.792074] ata4.00: cmd c8/00:08:08:0b:98/00:00:00:00:00/e3 tag 0 dma
4096 in
[ 1311.792075]          res 51/40:00:0e:0b:98/00:00:00:00:00/e3 Emask 0x9
(media error)
[ 1311.792198] ata4.00: status: { DRDY ERR }
[ 1311.792247] ata4.00: error: { UNC }
[ 1311.816427] ata4.00: configured for UDMA/100
[ 1311.832872] ata4.01: configured for UDMA/133
[ 1311.832893] ata4: EH complete
[ 1315.745297] ata4.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
[ 1315.745356] ata4.00: BMDMA stat 0x5
[ 1315.745407] ata4.00: failed command: READ DMA
[ 1315.745462] ata4.00: cmd c8/00:08:08:0b:98/00:00:00:00:00/e3 tag 0 dma
4096 in
[ 1315.745464]          res 51/40:00:0e:0b:98/00:00:00:00:00/e3 Emask 0x9
(media error)
[ 1315.745588] ata4.00: status: { DRDY ERR }
[ 1315.745637] ata4.00: error: { UNC }
[ 1315.768422] ata4.00: configured for UDMA/100
[ 1315.784891] ata4.01: configured for UDMA/133
[ 1315.784914] sd 3:0:0:0: [sda] Unhandled sense code
[ 1315.784917] sd 3:0:0:0: [sda] Result: hostbyte=DID_OK
driverbyte=DRIVER_SENSE
[ 1315.784921] sd 3:0:0:0: [sda] Sense Key : Medium Error [current]
[descriptor]
[ 1315.784928] Descriptor sense data with sense descriptors (in hex):
[ 1315.784930]         72 03 11 04 00 00 00 0c 00 0a 80 00 00 00 00 00
[ 1315.784941]         03 98 0b 0e
[ 1315.784946] sd 3:0:0:0: [sda] Add. Sense: Unrecovered read error - auto
reallocate failed
[ 1315.784954] sd 3:0:0:0: [sda] CDB: Read(10): 28 00 03 98 0b 08 00 00 08
00
[ 1315.784965] end_request: I/O error, dev sda, sector 60295950
[ 1315.785044] ata4: EH complete
[ 1315.785068] EXT3-fs error (device sda1): ext3_get_inode_loc: unable to
read inode block - inode=1885681, block=7536737
[ 1315.785203] Aborting journal on device sda1.
[ 1315.785860] Remounting filesystem read-only
[ 1315.895542] EXT3-fs error (device sda1) in ext3_new_blocks: Journal has
aborted
[ 1315.895634] EXT3-fs error (device sda1) in ext3_orphan_add: Journal has
aborted
[ 1316.207259] EXT3-fs error (device sda1) in ext3_reserve_inode_write: IO
failure
[ 1316.207328] EXT3-fs error (device sda1) in ext3_new_inode: IO failure
[ 1316.207386] EXT3-fs error (device sda1) in start_transaction: Journal
has aborted
[ 1316.207460] EXT3-fs error (device sda1) in ext3_create: IO failure


Any suggestions on how to pull off the important data before too late?

Thanks,

Mark