HP-UX LVM question

[Sunny_Zhang]

Hi Experts,

I am kind of new to HP-UX, and HP-UX LVM. By reading the man page of lvm, vgcreate, lvcreate, etc. I realized that HP-UX 11i only supports 4 different types of volumes: default one, striped one, mirrored one, and extent based striped mirrored one (raid 0+1). Am I right? How about raid 1+0? Raid5? Can someone throw some lights on it? Thanks!

[Sunny_Zhang]

Also I read something about subdisk of HP-UX LVM from some other threads, but I thought only VxVM supports that. For HP-UX LVM, you have to create PV on the whole disk. Is that true?

[James R. Ferguson]

Hi SUnny:

This may help you compare LVM and VxVM:

http://docs.hp.com/en/5991-1841/5991-1841.pdf

Regards!

...JRF...

[Steven E. Protter]

Shalom Sunny,

through a mutli stepped process, you can manipulate LVN into producing RAID 5. You have to write a script to extend the logical volume across the various member in small chunks.

What you end up with is roughly raid 5 striping.

Better to start with the basics.

LVM with Mirror/UX supports RAID 1.

SEP

[Alzhy]

Yes Zhang.

And if you are well versed in VxVM .. then you can very well do away with LVM and use VxVM entirely.

You will notice that LVM is a step back from what you are accustomed to with VxVM but it does simply work. For enterprise/mission critical storage management though - I'd sleep better with VxVM...

[Sivakumar TS]

Hi,

You are right,

LVM desnt support RAID 1+0 / RAID 5,

you have to go for VxVM

Regards,

Siva.