Comment 6 for bug 301932

when I am using 2.6.24-21-eeepc , I do find some sd card IO error, but it does not cause reading halt, any hints?
Is it just a format error or physical media error?

marvel@marvel-epc:~$ uname -a
Linux marvel-epc 2.6.24-21-eeepc #1 SMP Thu Aug 7 22:18:05 MDT 2008 i686 GNU/Linux
marvel@marvel-epc:~$ dmesg |grep sd
[ 17.566487] Driver 'sd' needs updating - please use bus_type methods
[ 17.572117] sd 1:0:0:0: [sda] 7815024 512-byte hardware sectors (4001 MB)
[ 17.572153] sd 1:0:0:0: [sda] Write Protect is off
[ 17.572160] sd 1:0:0:0: [sda] Mode Sense: 00 3a 00 00
[ 17.572202] sd 1:0:0:0: [sda] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
[ 17.572318] sd 1:0:0:0: [sda] 7815024 512-byte hardware sectors (4001 MB)
[ 17.572342] sd 1:0:0:0: [sda] Write Protect is off
[ 17.572349] sd 1:0:0:0: [sda] Mode Sense: 00 3a 00 00
[ 17.572387] sd 1:0:0:0: [sda] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
[ 17.572398] sda: sda1 sda2 <<6>Initializing USB Mass Storage driver...
[ 17.588625] sda5 >
[ 17.588867] sd 1:0:0:0: [sda] Attached SCSI disk
[ 17.605273] sd 1:0:0:0: Attached scsi generic sg0 type 0
[ 22.422550] sd 2:0:0:0: [sdb] 16015360 512-byte hardware sectors (8200 MB)
[ 22.425541] sd 2:0:0:0: [sdb] Write Protect is off
[ 22.425551] sd 2:0:0:0: [sdb] Mode Sense: 03 00 00 00
[ 22.425558] sd 2:0:0:0: [sdb] Assuming drive cache: write through
[ 22.437571] sd 2:0:0:0: [sdb] 16015360 512-byte hardware sectors (8200 MB)
[ 22.440550] sd 2:0:0:0: [sdb] Write Protect is off
[ 22.440560] sd 2:0:0:0: [sdb] Mode Sense: 03 00 00 00
[ 22.440567] sd 2:0:0:0: [sdb] Assuming drive cache: write through
[ 22.440577] sdb: sdb1
[ 22.447733] sd 2:0:0:0: [sdb] Attached SCSI removable disk
[ 22.447844] sd 2:0:0:0: Attached scsi generic sg1 type 0
[ 30.801372] sd 2:0:0:0: [sdb] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE,SUGGEST_OK
[ 30.801389] sd 2:0:0:0: [sdb] Sense Key : Hardware Error [current]
[ 30.801399] sd 2:0:0:0: [sdb] Add. Sense: Unrecovered read error
[ 30.801412] end_request: I/O error, dev sdb, sector 16015344
[ 30.801423] Buffer I/O error on device sdb, logical block 2001918
[ 30.866367] sd 2:0:0:0: [sdb] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE,SUGGEST_OK
[ 30.866383] sd 2:0:0:0: [sdb] Sense Key : Hardware Error [current]
[ 30.866393] sd 2:0:0:0: [sdb] Add. Sense: Unrecovered read error
[ 30.866406] end_request: I/O error, dev sdb, sector 16015344
[ 30.866416] Buffer I/O error on device sdb, logical block 2001918
[ 30.983360] sd 2:0:0:0: [sdb] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE,SUGGEST_OK
[ 30.983374] sd 2:0:0:0: [sdb] Sense Key : Hardware Error [current]
[ 30.983384] sd 2:0:0:0: [sdb] Add. Sense: Unrecovered read error
[ 30.983396] end_request: I/O error, dev sdb, sector 16015344
[ 30.983407] Buffer I/O error on device sdb, logical block 2001918
[ 31.049355] sd 2:0:0:0: [sdb] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE,SUGGEST_OK
[ 31.049370] sd 2:0:0:0: [sdb] Sense Key : Hardware Error [current]
[ 31.049380] sd 2:0:0:0: [sdb] Add. Sense: Unrecovered read error
[ 31.049393] end_request: I/O error, dev sdb, sector 16015344
[ 31.049404] Buffer I/O error on device sdb, logical block 2001918
[ 33.738122] sdhci: Secure Digital Host Controller Interface driver
[ 33.738132] sdhci: Copyright(c) Pierre Ossman
[ 34.279112] Adding 224868k swap on /dev/sda5. Priority:-1 extents:1 across:224868k
[ 34.461053] EXT3 FS on sda1, internal journal
[ 34.996335] ReiserFS: sdb1: found reiserfs format "3.6" with standard journal
[ 34.996356] ReiserFS: sdb1: using ordered data mode
[ 34.998356] ReiserFS: sdb1: journal params: device sdb1, size 8192, journal first block 18, max trans len 1024, max batch 900, max commit age 30, max trans age 30
[ 34.999889] ReiserFS: sdb1: checking transaction log (sdb1)
[ 35.081128] ReiserFS: sdb1: replayed 1 transactions in 0 seconds
[ 35.091582] ReiserFS: sdb1: Using r5 hash to sort names