Disk Performance Post: 302962159

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Operating Systems Linux Disk Performance Post 302962159 by Peasant on Wednesday 9th of December 2015 03:45:00 AM

12-09-2015

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Check out the output of (output here is from one of my machines)..

Code:

ls -lart /dev/dm*
brw-rw----. 1 root disk253, 1 Nov 25 10:06 /dev/dm-1
brw-rw----. 1 root disk 253, 0 Nov 25 10:06 /dev/dm-0
brw-rw----. 1 root disk 253, 4 Nov 25 10:06 /dev/dm-4
brw-rw----. 1 root disk 253, 3 Nov 25 10:06 /dev/dm-3
brw-rw----. 1 root disk 253, 2 Nov 25 10:06 /dev/dm-2

Notice the MAJOR,MINOR numbers above

Code:

# dmsetup info
Name:              rootvg-tmp
State:             ACTIVE
Read Ahead:        256
Tables present:    LIVE
Open count:        1
Event number:      0
Major, minor:      253, 4
Number of targets: 1
..... # other output.

So rootvg-tmp coresponds with /dev/dm-4 device.

vgdisplay -v will provide output which physical volumes belong to which volume group.

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