05-28-2009
Quote:
Originally Posted by
m_raheelahmed
We do not have HACMP environment but we are using SDDPCM with MPIO for attaching host, we made the VG's & FS available on one host at a time.
This sounds like asking for trouble: if somehow two machines concurrently access the volumes it will result in corrupted filesystems, probably even if not both systems actually write to the disk. I remember reading the HACMP scripts for taking over the shared volumes from one cluster node to another once (back in the days when disks were SCSI or SSA) and they were an absolute nightmare of low-level device manipulation to avoid such problems.
Verify you really
really always access the LUNs only from one system at a time.
I hope this helps.
bakunin
7 More Discussions You Might Find Interesting
1. UNIX for Advanced & Expert Users
Hi,
All of a sudden I landed in a strange problem.
I was working with my C source code in vi editor. I did a wq! and
when reopened, the file is full of "data".. I mean the text contents are gone!!.
I believe this is a file corruption. I have tried the -r option with vi, but no success.
... (5 Replies)
Discussion started by: shibz
5 Replies
2. UNIX for Advanced & Expert Users
Hi,
When i run the code in solaris unix machine, the file from remote server is getting downloaded. but when i use the same code in IBM AIX remote machine, it is not running. It is saying "Erro during scp transfer." Below is the code.
Please give some resolution.
SCPClient client = new... (1 Reply)
Discussion started by: gravi2020
1 Replies
3. AIX
Hi all,
we have iBM p series server on that 4. 3 operating system is runing.but i need ti install 5.2 or 5.3 then i ahve to install oracle 10g release 2 .but we have only 1 GB of RAM.can i install 5.2 or 5.3 with same RAM and please send me a document which discribe about how to install... (5 Replies)
Discussion started by: younusdba
5 Replies
4. UNIX for Advanced & Expert Users
Hi,
could any one tell is there any test-suite or any idea How to do data corruption validation testing, means there is no any data corruption ?
Regards
Manish (1 Reply)
Discussion started by: manish_tcs_hp
1 Replies
5. AIX
Is IBM System Director good for collecting error and notifications from IBM servers such as x3250 x336 etc... or Please give me brief description for the purpose of IBM system Director
Thanks in advance (1 Reply)
Discussion started by: Vit0_Corleone
1 Replies
6. AIX
Anyone has installed IBM System Director? May I have the procedures manual or any experiences can be shared? (1 Reply)
Discussion started by: kwliew999
1 Replies
7. UNIX for Advanced & Expert Users
Hi,
While a tar file was created, the file system got full and there was no message on the tar failure. Then the system was shut down and the administrator says because the file system was full the shut down procedure corrupted the file system. I'm wondering, unix should have given some... (2 Replies)
Discussion started by: manivanm
2 Replies
LEARN ABOUT OSF1
vgreduce
VGREDUCE(8) System Manager's Manual VGREDUCE(8)
NAME
vgreduce - reduce a volume group
SYNOPSIS
vgreduce [-a|--all] [-A|--autobackup y|n] [-d|--debug] [-h|-?|--help] [--removemissing] [-t|--test] [-v|--verbose] VolumeGroupName [Physi-
calVolumePath...]
DESCRIPTION
vgreduce allows you to remove one or more unused physical volumes from a volume group.
OPTIONS
See lvm for common options.
-a, --all
Removes all empty physical volumes if none are given on command line.
--removemissing
Removes all missing physical volumes from the volume group, if there are no logical volumes allocated on those. This resumes normal
operation of the volume group (new logical volumes may again be created, changed and so on).
If this is not possible (there are logical volumes referencing the missing physical volumes) and you cannot or do not want to remove
them manually, you can run this option with --force to have vgreduce remove any partial LVs.
Any logical volumes and dependent snapshots that were partly on the missing disks get removed completely. This includes those parts
that lie on disks that are still present.
If your logical volumes spanned several disks including the ones that are lost, you might want to try to salvage data first by acti-
vating your logical volumes with --partial as described in lvm (8).
SEE ALSO
lvm(8), vgextend(8)
Sistina Software UK LVM TOOLS 2.02.95(2) (2012-03-06) VGREDUCE(8)