How To Check LUN or SAN Disk In Linux
How
to check attached lun from a storage device in Linux is explained with few
commands. Its just to understand better how to manage attached storage.
#cat
/proc/scsi/scsi file it wi give you information like below
Attached
devices:
Host:
scsi0 Channel: 00 Id: 00 Lun: 00
Vendor:
HP 36.4G Model: MAN3367MC Rev: HP05
Type:
Direct-Access ANSI SCSI revision: 02
Host:
scsi2 Channel: 00 Id: 00 Lun: 00
Vendor:
COMPAQ Model: HSV110 (C)COMPAQ Rev: 2003
Type:
Unknown ANSI SCSI revision: 02
Host:
scsi2 Channel: 00 Id: 00 Lun: 02
Vendor:
COMPAQ Model: HSV110 (C)COMPAQ Rev: 2003
Type:
Direct-Access ANSI SCSI revision: 02
Host:
scsi2 Channel: 00 Id: 00 Lun: 03
Vendor:
COMPAQ Model: HSV110 (C)COMPAQ Rev: 2003
Type:
Direct-Access ANSI SCSI revision: 02
Host:
scsi2 Channel: 00 Id: 01 Lun: 00
Vendor:
COMPAQ Model: HSV110 (C)COMPAQ Rev: 2003
Type:
Unknown ANSI SCSI revision: 02
Host:
scsi2 Channel: 00 Id: 01 Lun: 02
Vendor:
COMPAQ Model: HSV110 (C)COMPAQ Rev: 2003
Type:
Direct-Access ANSI SCSI revision: 02
Host:
scsi2 Channel: 00 Id: 01 Lun: 03
Vendor:
COMPAQ Model: HSV110 (C)COMPAQ Rev: 2003
Above
indicates that HSV110 is a storage disk and it also give the LUN numbers with
iscsi information
Like
here it shows scsi2 is a san disk
If you want know about SAN partition
#dmesg
| grep -i “attached”
Attached
scsi disk sda at scsi0, channel 0, id 0, lun 0
Attached
scsi disk sdb at scsi2, channel 0, id 0, lun 2
Attached
scsi disk sdc at scsi2, channel 0, id 0, lun 3
Attached
scsi disk sdd at scsi2, channel 0, id 1, lun 2
if
you dont have a vendor based software to detect your SAN disk (LUNs), or
instead u can use “multipath” tools which is open source utility. Then, u can
see the device names via running:
#
multipath -l
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