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[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
 
Thanks
siva

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