Hi All,
Need help how can i find newly added disk in multipath

[root@porsche~]# multipath -ll
mpathb (360000970000195701921533038383934) dm-1 EMC,SYMMETRIX
size=2.0T features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
|- 0:0:1:1 sdd 8:48 active ready running
|- 1:0:0:1 sdf 8:80 active ready running
|- 0:0:0:1 sdb 8:16 active ready running
`- 1:0:1:1 sdh 8:112 active ready running
mpatha (360000970000195701921533038393938) dm-0 EMC,SYMMETRIX
size=137G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
|- 0:0:0:0 sda 8:0 active ready running
|- 1:0:0:0 sde 8:64 active ready running
|- 0:0:1:0 sdc 8:32 active ready running
`- 1:0:1:0 sdg 8:96 active ready running
[root@porsche~]# ls -ltr /dev/sd*
brw-rw---- 1 root disk 8, 16 Mar 8 00:14 /dev/sdb
brw-rw---- 1 root disk 8, 32 Mar 8 00:14 /dev/sdc
brw-rw---- 1 root disk 8, 64 Mar 8 00:14 /dev/sde
brw-rw---- 1 root disk 8, 96 Mar 8 00:14 /dev/sdg
brw-rw---- 1 root disk 8, 112 Mar 23 11:45 /dev/sdh
brw-rw---- 1 root disk 8, 80 Mar 23 11:45 /dev/sdf
brw-rw---- 1 root disk 8, 48 Mar 23 11:45 /dev/sdd
brw-rw---- 1 root disk 8, 0 Mar 23 11:45 /dev/sda
brw-rw---- 1 root disk 8, 144 Mar 30 17:31 /dev/sdj
brw-rw---- 1 root disk 8, 128 Mar 30 17:31 /dev/sdi
brw-rw---- 1 root disk 8, 160 Mar 30 17:31 /dev/sdk
brw-rw---- 1 root disk 8, 176 Mar 30 17:31 /dev/sdl
[root@porsche~]# pvs
PV VG Fmt Attr PSize PFree
/dev/mapper/mpathap9 splunkvg lvm2 a-- 30.00g 0
/dev/mapper/mpathbp1 optvg lvm2 a-- 24.41g 2.69g
/dev/mapper/mpathbp2 appvg lvm2 a-- 1.98t 0
[root@porsche~]#

[root@porsche~]# ls -ltr /dev/mapper/mpath*
lrwxrwxrwx 1 root root 7 Mar 8 00:14 /dev/mapper/mpatha -> ../dm-0
lrwxrwxrwx 1 root root 7 Mar 8 00:14 /dev/mapper/mpathb -> ../dm-1
lrwxrwxrwx 1 root root 7 Mar 8 00:14 /dev/mapper/mpathap1 -> ../dm-2
lrwxrwxrwx 1 root root 7 Mar 8 00:14 /dev/mapper/mpathap2 -> ../dm-3
lrwxrwxrwx 1 root root 7 Mar 8 00:14 /dev/mapper/mpathbp1 -> ../dm-4
lrwxrwxrwx 1 root root 7 Mar 8 00:14 /dev/mapper/mpathap3 -> ../dm-5
lrwxrwxrwx 1 root root 7 Mar 8 00:14 /dev/mapper/mpathbp2 -> ../dm-6
lrwxrwxrwx 1 root root 7 Mar 8 00:14 /dev/mapper/mpathap4 -> ../dm-7
lrwxrwxrwx 1 root root 7 Mar 8 00:14 /dev/mapper/mpathap5 -> ../dm-8
lrwxrwxrwx 1 root root 7 Mar 8 00:14 /dev/mapper/mpathap6 -> ../dm-9
lrwxrwxrwx 1 root root 8 Mar 8 00:14 /dev/mapper/mpathap7 -> ../dm-10
lrwxrwxrwx 1 root root 8 Mar 8 00:14 /dev/mapper/mpathap8 -> ../dm-11
lrwxrwxrwx 1 root root 8 Mar 8 00:14 /dev/mapper/mpathap9 -> ../dm-12

Usually you perform the output comparison from previous run when the disk wasn't added and post run when the disk is added. If you are talking about how to check if the new disk is added or showing up on the system you have to perform a rescan of your fc host. You can refer the following document for the same: http://www.unixarena.com/2013/06/how...csi-disks.html

Hi,
I have scanned the newly scanned disk .But still im unable figure out the newly added disk in multipath

# echo "1" > /sys/class/fc_host/host0/issue_lip# echo "1" > /sys/class/fc_host/host1/issue_lip

Did you compare the output of fdisk -l before the disk was added and after the disk was added? Did you anyway check the output of fdisk -l and find any of the disk which shows as unpartitioned? Also, did you run lsblk command to see if any of the disk shows as unassigned.

How can i able to find unused disk in fdisk command


[root@porsche ~]# fdisk -l |egrep '^Disk' |egrep -v 'dm-'

Unable to read /dev/mapper/mpathap4
Disk /dev/sda: 140.6 GB, 146590924800 bytes
Disk identifier: 0x000d14dd
Disk /dev/sdd: 1198.9 GB, 2198863872000 bytes
Disk identifier: 0x00092f51
Disk /dev/sdb: 2198.9 GB, 2198863872000 bytes
Disk identifier: 0x00092f51
Disk /dev/sdc: 146.6 GB, 146590924800 bytes
Disk identifier: 0x000d14dd
Disk /dev/mapper/mpatha: 146.6 GB, 146590924800 bytes
Disk identifier: 0x000d14dd
Disk /dev/mapper/mpathb: 2198.9 GB, 2198863872000 bytes
Disk identifier: 0x00092f51
Disk /dev/mapper/mpathap1: 209 MB, 209715200 bytes
Disk identifier: 0x00000000
Disk /dev/mapper/mpathap2: 4294 MB, 4294967296 bytes
Disk identifier: 0x00000000
Disk /dev/sde: 146.6 GB, 146590924800 bytes
Disk identifier: 0x000d14dd
Disk /dev/sdf: 2198.9 GB, 2198863872000 bytes
Disk identifier: 0x00092f51
Disk /dev/sdg: 146.6 GB, 146590924800 bytes
Disk identifier: 0x000d14dd
Disk /dev/sdh: 2198.9 GB, 2198863872000 bytes
Disk identifier: 0x00092f51
Disk /dev/mapper/mpathbp1: 26.2 GB, 26214400000 bytes
Disk identifier: 0x00000000
Disk /dev/mapper/mpathap3: 10.7 GB, 10737418240 bytes
Disk identifier: 0x00000000
Disk /dev/mapper/mpathbp2: 2172.6 GB, 2172648423424 bytes
Disk identifier: 0x00000000
[root@porsche ~]#

With the output you shared we will not be able to make out anything as you have done inverse match for DM and start string to be Disk due to which lot of useful information is truncated. The only thing that is visible in the output is the number of disks which is of no use because we don't know how many were before.

Share the output of the following command as it is to get more information:

1.2.3.

Hi, try this 2 commands:

Hi All,
I have reloaded multpath (multipath -r ) now I could find the newly added disk to multipath configuration file

[root@porsche ~]# multipath -ll
mpathc (360000970000195701921533038443844) dm-30 EMC,SYMMETRIX
size=5.0T features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
|- 0:0:0:2 sdi 8:128 active ready running
|- 1:0:0:2 sdk 8:160 active ready running
|- 0:0:1:2 sdj 8:144 active ready running
`- 1:0:1:2 sdl 8:176 active ready running
mpathb (360000970000195701921533038384232) dm-2 EMC,SYMMETRIX
size=2.0T features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
|- 0:0:1:1 sdd 8:48 active ready running
|- 1:0:0:1 sdf 8:80 active ready running
|- 0:0:0:1 sdb 8:16 active ready running
`- 1:0:1:1 sdh 8:112 active ready running
mpatha (360000970000195701921533038394232) dm-0 EMC,SYMMETRIX
size=137G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
|- 0:0:0:0 sda 8:0 active ready running
|- 1:0:0:0 sde 8:64 active ready running
|- 0:0:1:0 sdc 8:32 active ready running
`- 1:0:1:0 sdg 8:96 active ready running


pvcreate /dev/mapper/mpathc