HBA Relpacement on sun solaris

Thanks GF

Solaris is quite different from HPUX. With Solaris you have to check your path_to_inst file. Solaris will change only the c# number since t#d# depends on the SAN and the storage port. If the new HBA will replace old one in path_to_inst, you'll have same c# ...

what is path_to_inst file ?
and do i have to remove hba from power path before removing it physically?
also since we have asm application ... is there a recommended steps we must follows?

I bet Sun may explain what is path_to_inst

http://docs.sun.com/app/docs/doc/816-5174/path-to-inst-4?a=view

http://www.sunmanagers.org/pipermail/summaries/2004-October/005800.html

If cXtYdZ won't change, ASM won't ever notice you replaced HBAs. I'm not an ASM expert thus can't advice how to reconfigure ASM in case cXtYdZ changes.

you dont need to remove HBA from PP. But after you replace the HBA the LUNS need to remasked to new HBA/WWN so that host can see devices once again.

The ASM config changes depend on your envioronment. In our setup we have a dependency with the paths(cXtYdZ) to the ASM devices so we have to point the ASM devices to new paths if there is a change.

i mean asm uses emcpower not the cXtYdZ

But if the
emcpower names changed and the cXtYdZ also changed
and we renamed it "emcpower" back by emcpadm util
and asm uses the emcpower devices ...will it be ok? without looking at the
cXtYdZ

i would go with YES; Dont you have a chance to test that in DEV environment