On Wednesday 09 February 2005 00:33, Mark D. Rodriguez wrote: > Stef, > > There are several ways to accomplish this. However,, you didn't give us > all the details so I will make some assumptions. I will assume you are > using at least 2 switches for redundant paths. I will assume that the > oracle backup is meant to be Lan-Free directly to tape. 2 x 2GBit switches will be used. The oracle backup will be indeed Lan-Free.
> I would zone the SAN fabric to separate disk traffic from tape traffic. This is a must as stated in most SAN books. Zoning is needed to make sure the tape drive don't see the disk data and vise versa. > The ITSM server should have at minimum 1 HBA for disk to each switch and > 1HBA for tape to each switch. Then each switch would be connected to > both the disks and the tape drives. If you will require greater > throughput then you will need to add more HBAs The question is: is it really needed to have separate HBA's for disk and tape? Can disk and tape go over the same HBA ?? If it's needed, I need 6 HBA's: 4 for the tapes and 2 for the disks. > The oracle server will need at least 2 HBAs one for disk and one for > tape traffic. However, this will not provide you with any fail over > protection if the switch you are using goes down. Add another 2 HBAs to > the other switch for optimal availability. Having 2 HBAs for disk > traffic will obviously improve your disk I/O performance and may in fact > be required be this system to get good oracle performance. To be able to connect a pSerie to a FAStT, it's needed to have 2 HBA's. You can do it with 1 HBA, but that's not recommended. Stef
