sginfo command in Linux  can be used to get information about the SCSI disks on the system.

Display disk vendor, product code and firmware version :

[root@unixfoo ~]# sginfo /dev/sdd
Device Type                0
Vendor:                    FUJITSU
Product:                   XXXXXXXX
Revision level:            D406

Display serial number of disk :

[root@unixfoo ~]# sginfo -s /dev/sdd
Serial Number ‘A234284039F6’

Display the disk speed (rpm) :

[root@unixfoo ~]# sginfo -g /dev/sdd | grep -i “Rotational Rate”
Rotational Rate                    10025
[root@unixfoo ~]#

The package “sg3_utils” contains the command “sginfo”. Here are the details of this package.

[root@unixfoo ~]# rpm -qf /usr/bin/sginfo
sg3_utils
[root@unixfoo ~]# rpm -qi sg3_utils
Name        : sg3_utils                         Relocations: (not relocatable)
Version     : 1.25                              Vendor: Redhat
Release     : 1.el5                             Build Date: xxx
Install Date: Tue 02 Sep 2008 01:45:04 PM PDT   Build Host: xx
Group       : Utilities/System                  Source RPM: sg3_utils.src.rpm
Size        : 1116360                           License: GPLv2+ and BSD
Signature   : DSA/SHA1, Mon 24 Mar 2008 05:47:27 PM PDT, Key ID 66c2345e0159
URL         : http://sg.torque.net/sg/sg3_utils.html
Summary     : Utils for Linux’s SCSI generic driver devices + raw devices
Description :
Collection of Linux utilities for devices that use the SCSI command set.
Includes utilities to copy data based on “dd” syntax and semantics (called
sg_dd, sgp_dd and sgm_dd); check INQUIRY data and VPD pages (sg_inq); check
mode and log pages (sginfo, sg_modes and sg_logs); spin up and down
disks (sg_start); do self tests (sg_senddiag); and various other functions.
See the README, CHANGELOG and COVERAGE files. Requires the linux kernel 2.4
series or later. In the 2.4 series SCSI generic device names (e.g. /dev/sg0)
must be used. In the 2.6 series other device names may be used as
well (e.g. /dev/sda).

Warning: Some of these tools access the internals of your system
and the incorrect usage of them may render your system inoperable.
[root@unixfoo ~]#

To read more :

Disk information using smartctl : http://unixfoo.blogspot.com/2007/11/disk-information-using-smartctl.html
How to identify disk speed in netapp : http://unixfoo.blogspot.com/2007/11/netapp-how-to-identify-disk-speed.html

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