When listing the disks used by LVM and it shows only dm, you can make it display the multipath friendly name

root@linux:~ # pvs
PV VG Fmt Attr PSize PFree
/dev/cciss/c0d0p2 rootvg lvm2 a- 135.69G 11.69G
/dev/dm-0 softwarevg lvm2 a- 100.00G 30.00G
/dev/dm-1 softwarevg lvm2 a- 100.00G 0
/dev/dm-2 softwarevg lvm2 a- 100.00G 0
/dev/dm-33 softwarevg lvm2 a- 100.99G 100.99G
/dev/dm-6 bkpcvrdvg lvm2 a- 50.00G 0
/dev/dm-7 softwarevg lvm2 a- 100.00G 0
/dev/dm-8 softwarevg lvm2 a- 50.00G 0

Edit file /etc/lvm/lvm.conf and tell LVM to not use the cache file. Set write_cache_state to 0

root@linux:~ # vi /etc/lvm/lvm.conf
write_cache_state = 0

And delete the cache file

root@linux:~ # rm /etc/lvm/.cache
or
root@linux:~ # rm /etc/lvm/cache/.cache

It should be displaying with the friendly names

root@linux:~ # pvs
PV VG Fmt Attr PSize PFree
/dev/cciss/c0d0p2 rootvg lvm2 a- 135.69G 11.69G
/dev/mapper/bkpdisk01-part1 bkpcvrdvg lvm2 a- 50.00G 0
/dev/mapper/sfwdisk01-part1 softwarevg lvm2 a- 100.00G 0
/dev/mapper/sfwdisk02-part1 softwarevg lvm2 a- 50.00G 0
/dev/mapper/sfwdisk03 softwarevg lvm2 a- 100.00G 0
/dev/mapper/sfwdisk04 softwarevg lvm2 a- 100.00G 30.00G
/dev/mapper/sfwdisk05 softwarevg lvm2 a- 100.00G 0
/dev/mapper/sfwdisk05_NEW1 softwarevg lvm2 a- 100.99G 100.99G

Also check the filter parameter in the file /etc/lvm/lvm.conf

filter = [ “a|cciss/.*|” “a|/dev/mapper/.*|”, “a|/dev/sda.*|”, “r|/dev/sd.*|”, “r|/dev/dm-.*|” ]

If you need to map, go to /dev/mapper and do a long listing. Search for the number after the 253,. Eg. dm-33 is the sfwdisk05_NEW1

root@linux:/dev/mapper # ls -l total 0
brw——- 1 root root 253, 18 Dec 16 10:56 bkpcvrdvg-apliclv
brw——- 1 root root 253, 19 Dec 16 10:56 bkpcvrdvg-bkpcvrdlv
brw——- 1 root root 253, 3 Dec 16 10:56 bkpdisk01
brw——- 1 root root 253, 6 Dec 16 10:56 bkpdisk01-part1
lrwxrwxrwx 1 root root 16 Dec 16 10:56 control -> ../device-mapper
brw——- 1 root root 253, 28 Mar 13 05:45 mpathe
brw——- 1 root root 253, 29 Mar 13 05:45 mpathf
brw——- 1 root root 253, 30 Mar 13 05:45 mpathg
brw——- 1 root root 253, 31 Mar 13 05:45 mpathh
brw——- 1 root root 253, 32 Mar 13 05:45 mpathi
brw——- 1 root root 253, 9 Dec 16 10:57 rootvg-auditlv
brw——- 1 root root 253, 10 Dec 16 10:57 rootvg-locallv
brw——- 1 root root 253, 11 Dec 16 10:57 rootvg-optlv
brw——- 1 root root 253, 12 Dec 16 10:56 rootvg-rootlv
brw——- 1 root root 253, 13 Dec 16 10:56 rootvg-swaplv
brw——- 1 root root 253, 14 Dec 16 10:57 rootvg-tmplv
brw——- 1 root root 253, 15 Dec 16 10:58 rootvg-userslv
brw——- 1 root root 253, 16 Dec 16 10:58 rootvg-usrlv
brw——- 1 root root 253, 17 Dec 16 10:58 rootvg-varlv
brw——- 1 root root 253, 4 Dec 16 10:56 sfwdisk01
brw——- 1 root root 253, 7 Dec 16 10:56 sfwdisk01-part1
brw——- 1 root root 253, 5 Dec 16 10:56 sfwdisk02
brw——- 1 root root 253, 8 Dec 16 10:56 sfwdisk02-part1
brw——- 1 root root 253, 1 Dec 16 10:56 sfwdisk03
brw——- 1 root root 253, 0 Dec 16 10:56 sfwdisk04
brw——- 1 root root 253, 2 Dec 16 10:56 sfwdisk05
brw——- 1 root root 253, 27 Mar 13 09:24 sfwdisk05_NEW
brw——- 1 root root 253, 33 Mar 13 09:26 sfwdisk05_NEW1
brw——- 1 root root 253, 25 Dec 16 12:25 softwarevg-applv
brw——- 1 root root 253, 26 Dec 16 10:56 softwarevg-arqlv
brw——- 1 root root 253, 21 Dec 16 10:56 softwarevg-deploylv
brw——- 1 root root 253, 22 Dec 16 10:56 softwarevg-logslv
brw——- 1 root root 253, 24 Dec 16 10:56 softwarevg-oraclelv
brw——- 1 root root 253, 20 Dec 16 10:56 softwarevg-softwarelv
brw——- 1 root root 253, 23 Dec 16 10:56 softwarevg-transferlv

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