Cache device dropped offline:
Feb 15 01:04:15 MNAS kernel: ata3: hard resetting link
Feb 15 01:04:20 MNAS kernel: ata3: SATA link up 1.5 Gbps (SStatus 113 SControl 310)
Feb 15 01:04:30 MNAS kernel: ata3.00: qc timeout (cmd 0xec)
Feb 15 01:04:30 MNAS kernel: ata3.00: failed to IDENTIFY (I/O error, err_mask=0x4)
Feb 15 01:04:30 MNAS kernel: ata3.00: revalidation failed (errno=-5)
Feb 15 01:04:30 MNAS kernel: ata3.00: disabled
Check/replace cables.