dmesg | grep -i scsi
SCSI subsystem initialized
scsi0 : SCSI emulation for USB Mass Storage devices
scsi 0:0:0:0: Direct-Access     WDC WD50 00AAKS-00YGA0         PQ: 0 ANSI: 2 CCS
scsi 0:0:0:1: Direct-Access     WDC WD50 00AAKS-00YGA0         PQ: 0 ANSI: 2 CCS
sd 0:0:0:0: [sda] Attached SCSI disk
sd 0:0:0:1: [sdb] Attached SCSI disk



dmesg | grep -i sd
Driver 'sd' needs updating - please use bus_type methods
sd 0:0:0:0: [sda] 976773168 512-byte hardware sectors (500108 MB)
sd 0:0:0:0: [sda] Write Protect is off
sd 0:0:0:0: [sda] Mode Sense: 00 38 00 00
sd 0:0:0:0: [sda] Assuming drive cache: write through
sd 0:0:0:0: [sda] 976773168 512-byte hardware sectors (500108 MB)
sd 0:0:0:0: [sda] Write Protect is off
sd 0:0:0:0: [sda] Mode Sense: 00 38 00 00
sd 0:0:0:0: [sda] Assuming drive cache: write through
 sda: sda1 sda2 sda3
sd 0:0:0:0: [sda] Attached SCSI disk
sd 0:0:0:1: [sdb] 976773168 512-byte hardware sectors (500108 MB)
sd 0:0:0:1: [sdb] Write Protect is off
sd 0:0:0:1: [sdb] Mode Sense: 00 38 00 00
sd 0:0:0:1: [sdb] Assuming drive cache: write through
sd 0:0:0:1: [sdb] 976773168 512-byte hardware sectors (500108 MB)
sd 0:0:0:1: [sdb] Write Protect is off
sd 0:0:0:1: [sdb] Mode Sense: 00 38 00 00
sd 0:0:0:1: [sdb] Assuming drive cache: write through
 sdb: sdb1 sdb2 sdb3
sd 0:0:0:1: [sdb] Attached SCSI disk
Installing knfsd (copyright (C) 1996 okir@monad.swb.de).
NFSD: Using /var/lib/nfs/v4recovery as the NFSv4 state recovery directory
NFSD: starting 90-second grace period
md: bind<sda2>
md: bind<sdb2>
raid0: looking at sdb2
raid0:   comparing sdb2(488070656) with sdb2(488070656)
raid0: looking at sda2
raid0:   comparing sda2(488070656) with sdb2(488070656)