[linux-lvm] determining boot disk name(/dev/sd...) on RHEL LVM

Venkata rama krishna Boddu venkat.boddu at ymail.com
Fri Apr 26 13:00:34 UTC 2013

Following two command worked for me.

$ dmsetup ls --tree
vg_node-lv_swap (253:1)
 └─ (8:2)
vg_node-lv_root (253:0)
 └─ (8:2)
$ ls -la /dev/ | grep "8,   2"
brw-rw----   1 root disk      8,   2 Apr 24 15:42 sda2

Mobile: +91-9503043606

 From: siva krishna <hisivakrishna at gmail.com>
To: linux-lvm at redhat.com 
Sent: Friday, 26 April 2013 2:49 PM
Subject: [linux-lvm] determining boot disk name(/dev/sd...) on RHEL LVM

Hi all,
is there a way to determine the device name (eg: /dev/sda, /dev/sdb)
on lvm partitioned disks,  when the os is booted from the lvm partitioned disk
and there are also multiple disks connected which are having lvm partions with same volume group names as the primary disk.
i tried doing vgdisplay
 and then correlating it's output with cat /etc/fstab, cat /etc/cmdline
but there are multiple volume groups having the same name so can't find from which volume the RHEL is booting
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read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
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