topic Re: SAN Implementation in Operating System - HP-UX

SAN Implementation

Alan Casey — Wed, 14 Jan 2004 04:52:11 GMT

Hi guys,

We have recently bought a SAN to replace our old EMC disk array. As the first part of this project I will have to migrate data to the new SAN for a single HP-UX 11.0 server. VG00 on the Server is the only VG on the intenal disks, and on the other VG's we have lv's containing both filesystems and raw data.

I feel the only way to move all of this data is to use the dd command, and I'm not sure if I will need to do a vgexport/import?
Has anyone done this before, or does anyone know what the best plan would be to achieve migration?
Thanks, Alan

Re: SAN Implementation

Sunil Sharma_1 — Wed, 14 Jan 2004 05:21:36 GMT

Hi,

can you give some more info about your SAN system.

Sunil

Re: SAN Implementation

Alan Casey — Wed, 14 Jan 2004 05:49:55 GMT

The SAN, is an EMC Clariion CX400 with approx 500GB of disk space.

Re: SAN Implementation

Zeev Schultz — Wed, 14 Jan 2004 06:26:43 GMT

Some other ideas are mirroring the disks and splitting later, or adding EMC LUN to the vg
and doing pvmove of physicall extents to that
volume (pretty transparent LVM safe way but not faster than dd).

Re: SAN Implementation

Jean-Luc Oudart — Wed, 14 Jan 2004 06:29:02 GMT

Hi,

Mirroring may be the solution (some conastraint anyway).
MirrorUX is required of course

check :
http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=204251
or this one
http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=225809

Regards,
Jean-Luc

Re: SAN Implementation

Hoefnix — Wed, 14 Jan 2004 06:30:20 GMT

Is it possible to connect the HP-UX server to both SAN's (old and new, maybe single path's to both SAN's).
Then you can use lvol mirror's to copy the data.
So vgextend and lvextend then do a lvreduce from the old san disks for all the lvols in a vg.
Then do a vgreduce and the data should be on the new SAN.

Regards,

Peter