Re: BCV (EMC) for INFORMIX

When you are doing the split of the primary and BCV are you doing a onmode -c block? You need to stop all activity in the database so that the spilit will be consistent. This technique will work just fine for small or large databases. We have two BCV sets one is split off nightly one weekly. The instances are all 196GB. We split the devices off to separte machines, for various reporting and testing purposes. You don't want to do you split at a time with heavy load. Also what we have found best is to onmode -c onmode -c blocksplit BVC off onmode -c unblock Hope this helps Greg wwalls@erols.com wrote: > Trying to copy an instances vg to another set of disks via BCV (EMC). > The original set of disks is good. The final set of disks the database > is not valid. Getting a Bad Page Header in bfput....I have been able > to get to work for a small instance (2 devices), doesn't seem to work > for larger instances. Is anyone out there using BCV (EMC) to duplicate > database on the same machine? And no, the databases are not available > at the same time. The original set is the R2 only used for disaster > recovery. We are trying to mount a set of local disks with the copy of > the R2 and leave the R2 linked for DR. Oh this is on AIX just in case > you wanted to know. So I have to do the chdev on the disks so the > pvid's are different after the copy.... > > Regards, > > Walter Walls > > Sent via Deja.com http://www.deja.com/ > Before you buy.

We are shutting down the database. The onmode -c should not be necessary. The database would not even be open. Is there something specific that is in the rootdbs raw slice pertaining to PVID of the powerdisk. We are getting and assertion failure and it is pointing to the AIX LVCB. Regards, Walter Walls In article <3819CE3F.19294909@spf.fairchildsemi.com>, dewinter@informix.com wrote: > When you are doing the split of the primary and BCV are you doing a onmode> -c block? You need to stop all activity in the database so that the spilit > will be consistent. This technique will work just fine for small or large > databases. We have two BCV sets one is split off nightly one weekly. The > instances are all 196GB. We split the devices off to separte machines, > for various reporting and testing purposes. You don't want to do you split > at a time with heavy load. Also what we have found best is to > onmode -c > onmode -c block> split BVC off > onmode -c unblock> > Hope this helps > > Greg > > wwalls@erols.com wrote: > > > Trying to copy an instances vg to another set of disks via BCV (EMC). > > The original set of disks is good. The final set of disks the database > > is not valid. Getting a Bad Page Header in bfput....I have been able > > to get to work for a small instance (2 devices), doesn't seem to work > > for larger instances. Is anyone out there using BCV (EMC) to duplicate > > database on the same machine? And no, the databases are not available > > at the same time. The original set is the R2 only used for disaster > > recovery. We are trying to mount a set of local disks with the copy of > > the R2 and leave the R2 linked for DR. Oh this is on AIX just in case > > you wanted to know. So I have to do the chdev on the disks so the > > pvid's are different after the copy.... > > > > Regards, > > > > Walter Walls > > > > Sent via Deja.com http://www.deja.com/ > > Before you buy. > > Sent via Deja.com http://www.deja.com/ Before you buy.