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Operating Systems Linux Ubuntu Scan and create file systems in new LUNs Post 302956378 by Peasant on Tuesday 29th of September 2015 11:41:32 AM
Old 09-29-2015
Check out the output of
Code:
dmsetup info

Locate the disk with 252:2 major/minor number.
Check if that disk is local disk and blacklist that disk so multipath is not active.

Refer to :
https://help.ubuntu.com/lts/servergu...multipath.html
Section : Ignoring Local Disks When Generating Multipath Devices

Restart multipath daemon.

Post output of :
Code:
multipath -v3
ls -lrt /dev/mapper/*

Rescan the fabric. You have some cards inside from manufacturer X.
Check out the documentation regarding scanning from Linux host, i cannot say for sure.
Most makers provide some sort of utilities to rescan (scripts etc.).. you will have to figure that one out Smilie

---------- Post updated at 17:41 ---------- Previous update was at 17:37 ----------

Sorry i cannot edit posts (issue with browser Smilie ), it will just double post.

Read the documentation on provided links.
You will need to configure the multipath.conf, instructions are there (Configuring storage devices).

Hope the helps
Regards
Peasant.
 

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KPARTX(8)                                                  Linux Administrator's Manual                                                  KPARTX(8)

NAME
kpartx - Create device maps from partition tables SYNOPSIS
kpartx [-a | -d | -l] [-v] wholedisk DESCRIPTION
This tool, derived from util-linux' partx, reads partition tables on specified device and create device maps over partitions segments detected. It is called from hotplug upon device maps creation and deletion. OPTIONS
-a Add partition mappings -r Readonly partition mappings -r Read-only partition mappings -d Delete partition mappings -u Update partition mappings -l List partition mappings that would be added -a -p set device name-partition number delimiter -f force creation of mappings; overrides 'no_partitions' feature -g force GUID partition table (GPT) -v Operate verbosely -s Sync mode. Don't return until the partitions are created EXAMPLE
To mount all the partitions in a raw disk image: kpartx -av disk.img This will output lines such as: loop3p1 : 0 20964762 /dev/loop3 63 The loop3p1 is the name of a device file under /dev/mapper which you can use to access the partition, for example to fsck it: fsck /dev/mapper/loop3p1 When you're done, you need to remove the devices: kpartx -d disk.img SEE ALSO
multipath(8) multipathd(8) hotplug(8) AUTHORS
This man page was assembled By Patrick Caulfield for the Debian project. From documentation provided by the multipath author Christophe Varoqui, <christophe.varoqui@opensvc.com> and others. July 2006 KPARTX(8)
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