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

SAN Migration

Mark Bak — Tue, 09 Oct 2007 11:17:15 GMT

We are migrating from Brocade to Cisco switches and we have a mixed OS environment. Some of the HPUX hosts are Service Guard clusters and most are using Secure Path and SDD multipath software.

I know the device files will change after attaching the fiber to the new Cisco switch.
What would be the best procedure for HPUX servers pre and post migration? My thought was to do vgexport/vgimport. Another possible method could be to use ioinit. Which do you think would be a better process or do you have another suggestion?

Re: SAN Migration

James R. Ferguson — Tue, 09 Oct 2007 11:42:20 GMT

Hi Mark:

Use 'vgexport' and 'vgimport'. You might want to collect your device paths in the 'outfile' [ -f outfile ] of the 'vgexport' then edit the names and deploy the file as the 'infile' [ -f infile ] of 'vgimport'. See the manpages for both commands for more information.

I would not attempt to reassign device file instance numbers.

Certainly, if you are running 11.31 look into the persistant device file in lieu of the legacy names!

Regards!

...JRF...

Re: SAN Migration

Tim Nelson — Tue, 09 Oct 2007 12:42:42 GMT

If the fabric and ports are all swapped 1 for 1 from the old switch to the new switch then would your hardware addresses really change ? Could you test this with a test server ?

I the x and the y below are determined by fabric number and fa port.
the HW address only 0/1/0/0.x.y.l.u.n

So would the address really change if these were kept the same?

Re: SAN Migration

Sandy Chen — Tue, 09 Oct 2007 22:18:12 GMT

Hi Mark,

Use vgexport and vgimport, as it is much more easier to do and it should do good for you. Use ioinit if you have any application that bind to physical disk only, but I think it will be very rare.

Regards,
Sandy