There is a little-known tool called readvgda which does what its name suggests - read the VGDA and print its content out to screen. I use it regularly when working on (to me) unknown systems when i need to find out about the VG type (classic, big or scalable) because otherwise there is no direct way to get that information elsewhere. You can use it for any other purposes too, though. The format is:
where hdiskN is any hdisk device in the VG. Here is a longer article about it but knowing what to search for you find many others too.
The VGDA is stored in (at least) two different locations of the disk and if one is broken you may still read the other one and use that. You can easily do that with dd so you won't need IBM to do that for you. Of course this is a potentially risky operation so my suggestion is to test it first on a throwaway system/disk to get acquainted.
Hello,
how can i see easily the state of a mirrored disk on a AIX 4.3.3.
I try followed command:
lslv -m >lvname> but for me is not enough information.
thanx in advance
fenomen (2 Replies)
I've looked a little but haven't found a solid answer, assuming there is one.
What's better, hardware mirroring or ZFS mirroring? Common practice for us was to use the raid controllers on the Sun x86 servers. Now we've been using ZFS mirroring since U6. Any performance difference? Any other... (3 Replies)
Hi ,
I am new to SVM .when i try to learn RAID 1 , first they are creating two RAID 0 strips through
metainit d51 1 1 c0t0d0s2
metainit d52 1 1 c1t0d0s2
In the next step
metainit d50 -m d51
d50: Mirror is setup
next step is
metaattach d50 d52
d50 : submirror d52 is... (7 Replies)
Guys,
In my AIX 6.1 box the rootvg was on hdisk2, I tried to migrated it to hdisk0
Added hisk0 to rootvg , mirrored rootvg and changed bootlist and and sucessfully rebooted from hdisk0
Now I tried to remove the hdisk2 from rootvg so breaked mirror
-bash-3.00# unmirrorvg rootvg hdisk2... (3 Replies)
Dear all.
We have a very big issue on Attach HP EVA to IBM AIX powerpc singlepath.
the configurations on
lscfg -vl fcs2
fcs2 U789C.001.DQD8D74-P1-C2-T1 4Gb FC PCI Express Adapter (df1000fe)
Part Number.................10N7249
Serial... (3 Replies)
hello folks,
I have a 300GB ROOTVG volume groups with one filesystem /backup having 200GB allocated space
Now, I cannot alt disk clone or mirrorvg this hdisk with another smaller disk. The disk size has to be 300GB; I tried alt disk clone and mirrorvg , it doesn't work. you cannot copy LVs as... (9 Replies)
Hello,
aix 5.2, mirrored rootvg on hdisk0 and hdisk1. hdisk0 is dead. I can boot to cd, into sms, into maintenance mode. I can fsck all the various partitions on hdisk1 (the hd4 hd2 hd3, etc...) all is fine. But without the hdisk0 part of the mirror I cannot get the system to boot. ystem hangs on... (6 Replies)
Hello,
I have two hdisk in Power7 machine, the rootvg on hdisk0.
So to make a disk redundancy should make mirror or alt_clone and what is the different.
Appreciate your help
Thanks (1 Reply)
Hi everybody,
I have a little problem with my AIX 6.1, PowerHA 6.1 LVM mirroring.
I accidentally created logical volume cpsabcd2lv with external jfs2log loglv00 in the same volume group cpsdata2vg. Then I mirrored LV cpsabcd2lv on the second LUN in VG cpsdata2vg. My journal is unmirrored and... (0 Replies)