Cache device dropped offline:
Nov 3 09:04:18 NAS kernel: sd 12:0:3:0: attempting task abort!scmd(0x000000005fd2b71d), outstanding for 33986 ms & timeout 30000 ms
Nov 3 09:04:18 NAS kernel: sd 12:0:3:0: [sdn] tag#1415 CDB: opcode=0x28 28 00 03 95 eb e8 00 01 00 00
Nov 3 09:04:18 NAS kernel: scsi target12:0:3: handle(0x000a), sas_address(0x4433221102000000), phy(2)
Nov 3 09:04:18 NAS kernel: scsi target12:0:3: enclosure logical id(0x5782bcb03838b400), slot(1)
Nov 3 09:04:18 NAS kernel: sd 12:0:3:0: No reference found at driver, assuming scmd(0x000000005fd2b71d) might have completed
Nov 3 09:04:18 NAS kernel: sd 12:0:3:0: task abort: SUCCESS scmd(0x000000005fd2b71d)
Nov 3 09:04:18 NAS kernel: XFS (sdn1): xfs_do_force_shutdown(0x2) called from line 1196 of file fs/xfs/xfs_log.c. Return address = 000000001e8ac67c
Nov 3 09:04:18 NAS kernel: XFS (sdn1): Log I/O Error Detected. Shutting down filesystem
Nov 3 09:04:18 NAS kernel: XFS (sdn1): Please unmount the filesystem and rectify the problem(s)