How do I find out more information about block devices?

Posted on in Categories last updated March 17, 2006

You need to use blkid command to find out more information about block devices. It is a command-line utility to display block device attributes such as :
* Device name
* Its type
* Metadata

Typical entry looks as follows:
/dev/hdb5: UUID=”1c255a8d-9e55-4a23-9910-54d89a6369cc” SEC_TYPE=”ext2″ TYPE=”ext3″

To display information about all block devices simply type command (login as a root user):

# blkid

Output:

/dev/hdb5: UUID="1c255a8d-9e55-4a23-9910-54d89a6369cc" SEC_TYPE="ext2" TYPE="ext3"
/dev/hdb3: LABEL="RockSolidStorage" UUID="2dc96c9a-d214-4c3c-8c8c-295aec0ac314" SEC_TYPE="ext2" TYPE="ext3"
/dev/hdb1: LABEL="/" UUID="7a965fb9-bf9e-4ed5-8a01-321386b843d9" SEC_TYPE="ext2" TYPE="ext3"
/dev/cdrom: LABEL="AHSAN2000" TYPE="iso9660"
/dev/hda1: LABEL="/1" UUID="25498633-a626-49b0-88dc-ac33cabec7aa" SEC_TYPE="ext2" TYPE="ext3"
/dev/hdb2: TYPE="swap"
/dev/sda: UUID="f8999dde-d28f-4ae9-8d25-e9d6544e3698" SEC_TYPE="ext2" TYPE="ext3"

Posted by: Vivek Gite

The author is the creator of nixCraft and a seasoned sysadmin and a trainer for the Linux operating system/Unix shell scripting. He has worked with global clients and in various industries, including IT, education, defense and space research, and the nonprofit sector. Follow him on Twitter, Facebook, Google+.

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