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Full Discussion: Must restore data to DR server
Operating Systems AIX Must restore data to DR server Post 302261578 by bakunin on Tuesday 25th of November 2008 05:30:58 AM
Old 11-25-2008
Quote:
Originally Posted by pobman
was not sure about the PP though how can I tell what I should use? So I left it as 32MB
When a disk is added to a VG it is divided in parts the size of PPsize.

So you can tell by applying LVM restrictions: a single disk can hold max. 1019 PPs. If you have disks approximately 32GB in size you can go with a PP size of 32MB, arriving at ~1000 PPs per disk. If your disks are considerably larger than this you would only be able to use the first 32GB (1019x32MB to be exact) of the disk, losing the rest of it.

Since it is a good idea of leaving room for expansion everywhere consider using a PP size which divides the disk in 200-500 parts. For example: for 72GB disks use a PP size of 256MB giving ~300 PPs. This would allow for the use of disks up to 260GB without losing space.

I hope this helps.

bakunin
 

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LEARN ABOUT DEBIAN

mkqdisk

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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