how do I change major-minor numbers of disk devices Post: 302296896

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Operating Systems AIX how do I change major-minor numbers of disk devices Post 302296896 by zaxxon on Thursday 12th of March 2009 06:24:41 AM

03-12-2009

Registered User

I just read up a bit about ASM since we don't use it, at least our oracle guys just use the raw volumes they get and only tell us the lv names they want to use. We didn't had the request yet to change major or minor numbers.
I tried to find any info about this, but couldn't find anything about it. It seems they always just create the devices with the major numbers you need, like in this article:
Creating ASM devices on AIX � AskDba.org Weblog

.. and also there is something about it in this one, but just when creating:

http://www-03.ibm.com/support/techdocs/atsmastr.nsf/5cb5ed706d254a8186256c71006d2e0a/f939ff19b6430df7862570e5005027dc/$FILE/10gRAC_ASM.pdf

I think you can't change them with chdev as it is no attribute you get listed with lsattr for example. I have not worked with ASM yet to give you more info, sorry.
Not sure if it's sufficient just to have the VGs with same major numbers like you can get when importvg them with importvg -V <mj-number>... as when you are importing VGs by same major number inside a cluster on different cluster nodes.

Maybe one of the others have more experience with that, sorry.

zaxxon

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pvscan

PVSCAN(8)						      System Manager's Manual							 PVSCAN(8)

NAME

       pvscan - scan all disks for physical volumes

SYNOPSIS

       pvscan  [-d|--debug]  [-h|--help]  [-v|--verbose]  [--version]  [--ignorelockingfailure]  [-e|--exported] [-n|--novolumegroup] [-s|--short]
       [-u|--uuid]

       pvscan [-d|--debug] [-h|--help] --cache [--major major --minor minor | DevicePath ] ...

DESCRIPTION

       pvscan scans all supported LVM block devices in the system for physical volumes.

OPTIONS

       See lvm(8) for common options.

       -e, --exported
	      Only show physical volumes belonging to exported volume groups.

       -n, --novolumegroup
	      Only show physical volumes not belonging to any volume group.

       -s, --short
	      Short listing format.

       -u, --uuid
	      Show UUIDs (Uniform Unique Identifiers) in addition to device special names.

       --cache [ --major major --minor minor | DevicePath ] ...
	      Scan one or more devices and instruct the lvmetad daemon to update its cached state accordingly.	Called internally by  udev  rules.
	      All devices listed explicitly are processed regardless of any device filters set in lvm.conf.

SEE ALSO

       lvm(8), pvcreate(8), pvdisplay(8)

Sistina Software UK					 LVM TOOLS 2.02.95(2) (2012-03-06)						 PVSCAN(8)