Replace cables on disk and try again.
https://askubuntu.com/questions/133946/are-these-sata-errors-dangerous
66.009023] ata1.00: exception Emask 0x0 SAct 0x18180000 SErr 0x0 action 0x0
[ 66.009032] ata1.00: irq_stat 0x40000008
[ 66.009035] ata1.00: failed command: READ FPDMA QUEUED
[ 66.009037] ata1.00: cmd 60/88:98:20:ad:d8/00:00:00:00:00/40 tag 19 ncq dma 69632 in
res 41/40:88:20:ad:d8/00:00:00:00:00/40 Emask 0x409 (media error) <F>
[ 66.009044] ata1.00: status: { DRDY ERR }
[ 66.009045] ata1.00: error: { UNC }
[ 66.015760] ata1.00: configured for UDMA/133
[ 66.015786] sd 0:0:0:0: [sda] tag#19 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_OK cmd_age=0s
[ 66.015791] sd 0:0:0:0: [sda] tag#19 Sense Key : Medium Error [current]
[ 66.015794] sd 0:0:0:0: [sda] tag#19 Add. Sense: Unrecovered read error - auto reallocate failed
[ 66.015797] sd 0:0:0:0: [sda] tag#19 CDB: Read(10) 28 00 00 d8 ad 20 00 00 88 00
[ 66.015799] I/O error, dev sda, sector 14200096 op 0x0:(READ) flags 0x80700 phys_seg 2 prio class 2
[ 66.015824] ata1: EH complete
[ 67.600898] ata1.00: exception Emask 0x0 SAct 0x130000 SErr 0x0 action 0x0
[ 67.600908] ata1.00: irq_stat 0x40000008
[ 67.600912] ata1.00: failed command: READ FPDMA QUEUED
[ 67.600914] ata1.00: cmd 60/e0:80:20:9e:96/00:00:18:00:00/40 tag 16 ncq dma 114688 in
res 41/40:e0:20:9e:96/00:00:18:00:00/40 Emask 0x409 (media error) <F>
[ 67.600920] ata1.00: status: { DRDY ERR }
[ 67.600922] ata1.00: error: { UNC }