[  472.528011] ata3.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
[  472.528016] ata3.00: BMDMA stat 0x25
[  472.528019] ata3.00: failed command: READ DMA
[  472.528025] ata3.00: cmd c8/00:88:a2:1c:80/00:00:00:00:00/e1 tag 0 dma 69632 in
                        res 51/40:00:a8:1c:80/40:00:01:00:00/01 Emask 0x9 (media error)
[  472.528027] ata3.00: status: { DRDY ERR }
[  472.528029] ata3.00: error: { UNC }
[  472.553274] ata3.00: configured for UDMA/133
[  472.553311] sd 2:0:0:0: [sdb] tag#0 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[  472.553314] sd 2:0:0:0: [sdb] tag#0 Sense Key : Medium Error [current]
[  472.553317] sd 2:0:0:0: [sdb] tag#0 Add. Sense: Unrecovered read error - auto reallocate failed
[  472.553321] sd 2:0:0:0: [sdb] tag#0 CDB: Read(10) 28 00 01 80 1c a2 00 00 88 00
[  472.553324] blk_update_request: I/O error, dev sdb, sector 25173160 op 0x0:(READ) flags 0x80700 phys_seg 17 prio c
[  472.553340] ata3: EH complete
[  475.415992] ata3.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
[  475.415997] ata3.00: BMDMA stat 0x25
[  475.416001] ata3.00: failed command: READ DMA
[  475.416007] ata3.00: cmd c8/00:80:aa:1c:80/00:00:00:00:00/e1 tag 0 dma 65536 in
                        res 51/40:00:aa:1c:80/40:00:01:00:00/01 Emask 0x9 (media error)
[  475.416009] ata3.00: status: { DRDY ERR }
[  475.416011] ata3.00: error: { UNC }
[  475.501253] ata3.00: configured for UDMA/133
[  475.501290] sd 2:0:0:0: [sdb] tag#0 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[  475.501294] sd 2:0:0:0: [sdb] tag#0 Sense Key : Medium Error [current]
[  475.501296] sd 2:0:0:0: [sdb] tag#0 Add. Sense: Unrecovered read error - auto reallocate failed
[  475.501300] sd 2:0:0:0: [sdb] tag#0 CDB: Read(10) 28 00 01 80 1c aa 00 00 80 00
[  475.501304] blk_update_request: I/O error, dev sdb, sector 25173162 op 0x0:(READ) flags 0x80000 phys_seg 16 prio c
[  475.501340] ata3: EH complete
[  475.501364] EXT4-fs error (device sdb1): __ext4_get_inode_loc:4698: inode #800703: block 3146651: comm CHTTPCacheI