root@ubuntu:/home/ubuntu# zgrep sdd /var/log/kern.log 
May  7 23:34:38 ubuntu kernel: [   54.148543] SCSI device sdd: 488397168 512-byte hdwr sectors (250059 MB)
May  7 23:34:38 ubuntu kernel: [   54.148549] sdd: Write Protect is off
May  7 23:34:38 ubuntu kernel: [   54.148551] sdd: Mode Sense: 00 3a 00 00
May  7 23:34:38 ubuntu kernel: [   54.148560] SCSI device sdd: write cache: enabled, read cache: enabled, doesn't support DPO or FUA
May  7 23:34:38 ubuntu kernel: [   54.148584] SCSI device sdd: 488397168 512-byte hdwr sectors (250059 MB)
May  7 23:34:38 ubuntu kernel: [   54.148590] sdd: Write Protect is off
May  7 23:34:38 ubuntu kernel: [   54.148591] sdd: Mode Sense: 00 3a 00 00
May  7 23:34:38 ubuntu kernel: [   54.148601] SCSI device sdd: write cache: enabled, read cache: enabled, doesn't support DPO or FUA
May  7 23:34:38 ubuntu kernel: [   54.148603]  sdd: sdd1
May  7 23:34:38 ubuntu kernel: [   54.171810] sd 3:0:0:0: Attached scsi disk sdd
May  7 23:38:37 ubuntu kernel: [  319.232000] md: invalid superblock checksum on sdd1
May  7 23:38:37 ubuntu kernel: [  319.232000] md: sdd1 has invalid sb, not importing!
May  7 23:40:42 ubuntu kernel: [  443.468000] md: invalid superblock checksum on sdd1
May  7 23:40:42 ubuntu kernel: [  443.468000] md: sdd1 has invalid sb, not importing!
May  7 23:40:49 ubuntu kernel: [  450.360000] md: invalid superblock checksum on sdd1
May  7 23:40:49 ubuntu kernel: [  450.360000] md: sdd1 has invalid sb, not importing!
May  7 23:44:42 ubuntu kernel: [  684.068000] md: invalid superblock checksum on sdd1
May  7 23:44:42 ubuntu kernel: [  684.068000] md: sdd1 has invalid sb, not importing!
May  7 23:46:33 ubuntu kernel: [  795.308000] md: invalid superblock checksum on sdd1
May  7 23:46:33 ubuntu kernel: [  795.308000] md: sdd1 has invalid sb, not importing!
May  7 23:46:38 ubuntu kernel: [  799.900000] md: invalid superblock checksum on sdd1
May  7 23:46:38 ubuntu kernel: [  799.900000] md: sdd1 has invalid sb, not importing!
May  7 23:53:23 ubuntu kernel: [ 1204.692000] md: invalid superblock checksum on sdd1
May  7 23:53:23 ubuntu kernel: [ 1204.692000] md: sdd1 has invalid sb, not importing!
May  7 23:53:23 ubuntu kernel: [ 1204.696000] md: bind<sdd1>
May  7 23:53:23 ubuntu kernel: [ 1204.732000]  disk 2, o:1, dev:sdd1
May  8 01:17:44 ubuntu kernel: [ 6265.420000]  disk 2, o:1, dev:sdd1