Aug 31 18:27:52 ubuntu kernel: [ 2035.434926] ata4.00: configured for UDMA/100
Aug 31 18:27:52 ubuntu kernel: [ 2035.434951] ata4: EH complete
Aug 31 18:28:01 ubuntu kernel: [ 2044.406245] ata4.00: configured for UDMA/100
Aug 31 18:28:01 ubuntu kernel: [ 2044.406268] ata4: EH complete
Aug 31 18:28:06 ubuntu kernel: [ 2049.475329] ata4.00: configured for UDMA/100
Aug 31 18:28:06 ubuntu kernel: [ 2049.475346] ata4: EH complete
Aug 31 18:28:10 ubuntu kernel: [ 2053.623307] ata4.00: configured for UDMA/100
Aug 31 18:28:10 ubuntu kernel: [ 2053.623344] ata4: EH complete
Aug 31 18:28:14 ubuntu kernel: [ 2057.792179] ata4.00: configured for UDMA/100
Aug 31 18:28:14 ubuntu kernel: [ 2057.792197] ata4: EH complete
Aug 31 18:28:18 ubuntu kernel: [ 2061.928387] ata4.00: configured for UDMA/100
Aug 31 18:28:18 ubuntu kernel: [ 2061.928455] sd 3:0:0:0: [sda] Unhandled sense code
Aug 31 18:28:18 ubuntu kernel: [ 2061.928460] sd 3:0:0:0: [sda] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
Aug 31 18:28:18 ubuntu kernel: [ 2061.928467] sd 3:0:0:0: [sda] Sense Key : Medium Error [current] [descriptor]
Aug 31 18:28:18 ubuntu kernel: [ 2061.928475] Descriptor sense data with sense descriptors (in hex):
Aug 31 18:28:18 ubuntu kernel: [ 2061.928479]         72 03 11 04 00 00 00 0c 00 0a 80 00 00 00 00 00 
Aug 31 18:28:18 ubuntu kernel: [ 2061.928494]         10 74 07 23 
Aug 31 18:28:18 ubuntu kernel: [ 2061.928500] sd 3:0:0:0: [sda] Add. Sense: Unrecovered read error - auto reallocate failed
Aug 31 18:28:18 ubuntu kernel: [ 2061.928510] sd 3:0:0:0: [sda] CDB: Read(10): 28 00 10 74 06 80 00 01 00 00
Aug 31 18:28:18 ubuntu kernel: [ 2061.928530] __ratelimit: 9 callbacks suppressed
Aug 31 18:28:18 ubuntu kernel: [ 2061.928616] ata4: EH complete