Visit Jeremy's Blog.
Go Back > Forums > Other *NIX Forums > AIX
User Name
AIX This forum is for the discussion of IBM AIX.
eserver and other IBM related questions are also on topic.


  Search this Thread
Old 05-09-2006, 09:22 AM   #1
Registered: Dec 2003
Location: Little Rock, AR
Distribution: Fedora Core 2, AIX, HP-UX, Solaris, Whitebox
Posts: 193

Rep: Reputation: 31
Where is the PVID stored

Quick background on all this before the real question is asked.

A couple of weeks back I configured an HACMP cluster between to servers with SAN based shared storage. Now that the cluster is up and functional with no problems an issue with the EMC frame comes up. The only fix for the problem, according to the SAN guys, is to move everything over to a new frame.

My concern with moving the disks to a new frame is regarding the PVIDs. If those change then HACMP will have to reconfigured, if they don't change then there is very little for me to do other than to shutdown the cluster and reboot the servers.

So, the big question(s) is/are:

Where is the PVID stored?
Will this break HACMP?
Old 05-09-2006, 01:58 PM   #2
Michael AM
Registered: May 2006
Distribution: AIX 5.3, AIX 6.1, AIX 7.1
Posts: 123

Rep: Reputation: 33
The PVID is part of the VGDA (volumn group descriptor area).

I dont know about ECM, or Frames, but it shouldnt break HACMP in anyway.

Two basic safety things to do though: make a snapshot of your HACMP cluster. This should at least help greatly if you need to rebuild.

And, if at all possible save your volumn groups to a backup to tape or as a large file. The best command for this will be:
savevg -f <SomeBackupStorage> <your_vg_name>

If you backup to a large file, make sure you have ulimits set to -1 (no limits). The defaults will cause a backup to a file to fail generally.
michael@x054:[/home/michael]ulimit -a
time(seconds) unlimited
file(blocks) unlimited
data(kbytes) 131072
stack(kbytes) 32768
memory(kbytes) 32768
coredump(blocks) 2097151
nofiles(descriptors) 2000


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Where are routes stored? vusa Linux - Networking 4 04-28-2005 06:50 PM
Where mails get stored imahen Red Hat 2 02-06-2005 10:08 AM
Where is command stored ?? LinuxRam Linux - General 6 08-29-2004 12:45 PM
where are routes stored? Ph0enix2003 Linux - Networking 1 06-23-2004 10:46 PM
where are the rpms stored chens_83 Linux - Newbie 5 01-03-2002 02:37 AM > Forums > Other *NIX Forums > AIX

All times are GMT -5. The time now is 02:36 AM.

Main Menu
Write for LQ is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
Open Source Consulting | Domain Registration