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Operating Systems Linux RH Switching rootvg/sanvg to New SAN Post 302959715 by rfransix on Thursday 5th of November 2015 12:28:48 PM
Old 11-05-2015
Hammer & Screwdriver RH Switching rootvg/sanvg to New SAN

Hi, what's the safest procedure to reconfigure RH BFS to a new SAN?

Current setup boots rootvg and sanvg from a SAN.
Now a new SAN LUN is presented to the Linux Server.
The first and second SAN are srdf'd - so they are always in sync.

Can I re-use the existing LVM structure and somehow switch the underlying devices to the new LUNs?

Or, do I have to start from scratch, create new luns, re-build LVM, and re-install RH?

Urgent - this is scary. Thanks.
 

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mkqdisk(8)						      Quorum Disk Management							mkqdisk(8)

NAME
mkqdisk - Cluster Quorum Disk Utility WARNING
Use of this command can cause the cluster to malfunction. SYNOPSIS
mkqdisk [-?|-h] | [-L] | [-f label] [-c device -l label] [-d [-d ...]] DESCRIPTION
The mkqdisk command is used to create a new quorum disk or display existing quorum disks accessible from a given cluster node. OPTIONS
-c device -l label Initialize a new cluster quorum disk. This will destroy all data on the given device. If a cluster is currently using that device as a quorum disk, the entire cluster will malfunction. Do not run this on an active cluster when qdiskd is running. Only one device on the SAN should ever have the given label; using multiple different devices is currently not supported (it is expected a RAID array is used for quorum disk redundancy). The label can be any textual string up to 127 characters - and is therefore enough space to hold a UUID created with uuidgen(1). -f label Find the cluster quorum disk with the given label and display information about it. -L Display information on all accessible cluster quorum disks. -d Increase debugging level. Specify multiple times for more information. Currently, specifying more than twice has no effect. SEE ALSO
qdisk(5), qdiskd(8), uuidgen(1) July 2006 mkqdisk(8)
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