hw:/ # cat /proc/partitions
major minor  #blocks  name

   8     0  142577664 sda
   8     1    2104483 sda1
   8     2  140472360 sda2
hw:/ #
hw:/ #
hw:/ # cat /proc/scsi/scsi
Attached devices:
Host: scsi3 Channel: 00 Id: 00 Lun: 00
  Vendor: SONY     Model: DVD RW AD-7240S  Rev: 1.61
  Type:   CD-ROM                           ANSI SCSI revision: 05
Host: scsi4 Channel: 00 Id: 00 Lun: 00
  Vendor: SEAGATE  Model: ST9146853SS      Rev: 0002
  Type:   Direct-Access                    ANSI SCSI revision: 06
Host: scsi4 Channel: 00 Id: 01 Lun: 00
  Vendor: SEAGATE  Model: ST9146853SS      Rev: 0002
  Type:   Direct-Access                    ANSI SCSI revision: 06
Host: scsi4 Channel: 01 Id: 00 Lun: 00
  Vendor: LSILOGIC Model: Logical Volume   Rev: 3000
  Type:   Direct-Access                    ANSI SCSI revision: 02
hw:/ #
hw:/ #
hw:/ #
hw:/ # sg_map
/dev/sg0  /dev/sr0
/dev/sg1
/dev/sg2
/dev/sg3  /dev/sda
hw:/ #
hw:/ #
hw:/ # smartctl -i /dev/sr0
smartctl 5.43 2012-06-30 r3573 [i686-linux-2.6.16.60-0.54.5-smp] (local build)
Copyright (C) 2002-12 by Bruce Allen, http://smartmontools.sourceforge.net

Vendor:               SONY
Product:              DVD RW AD-7240S
Revision:             1.61
User Capacity:        2,942,599,168 bytes [2.94 GB]
Logical block size:   2048 bytes
Device type:          CD/DVD
Local Time is:        Sat Jan  5 23:41:30 2013 HKT
Device does not support SMART

hw:/ # smartctl -i /dev/sg0
smartctl 5.43 2012-06-30 r3573 [i686-linux-2.6.16.60-0.54.5-smp] (local build)
Copyright (C) 2002-12 by Bruce Allen, http://smartmontools.sourceforge.net

Vendor:               SONY
Product:              DVD RW AD-7240S
Revision:             1.61
User Capacity:        2,942,599,168 bytes [2.94 GB]
Logical block size:   2048 bytes
Device type:          CD/DVD
Local Time is:        Sat Jan  5 23:42:59 2013 HKT
Device does not support SMART
hw:/ #
hw:/ #
hw:/ #
hw:/ # smartctl -i /dev/sda
smartctl 5.43 2012-06-30 r3573 [i686-linux-2.6.16.60-0.54.5-smp] (local build)
Copyright (C) 2002-12 by Bruce Allen, http://smartmontools.sourceforge.net

Vendor:               LSILOGIC
Product:              Logical Volume
Revision:             3000
User Capacity:        145,999,527,936 bytes [145 GB]
Logical block size:   512 bytes
Logical Unit id:      0x600508e0000000001d1161754bfd1402
Device type:          disk
Local Time is:        Sat Jan  5 23:41:41 2013 HKT
Device does not support SMART
hw:/ #
hw:/ #

hw:/ # smartctl -i /dev/sg3
smartctl 5.43 2012-06-30 r3573 [i686-linux-2.6.16.60-0.54.5-smp] (local build)
Copyright (C) 2002-12 by Bruce Allen, http://smartmontools.sourceforge.net

Vendor:               LSILOGIC
Product:              Logical Volume
Revision:             3000
User Capacity:        145,999,527,936 bytes [145 GB]
Logical block size:   512 bytes
Logical Unit id:      0x600508e0000000001d1161754bfd1402
Device type:          disk
Local Time is:        Sat Jan  5 23:43:36 2013 HKT
Device does not support SMART
hw:/ #
hw:/ #