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.

I would zone the SAN fabric to separate disk traffic from tape traffic.

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 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.  Backing up a
40GB log once and hour can easily be done through one HBA to the tape
drives.

--
Regards,
Mark D. Rodriguez
President MDR Consulting, Inc.

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Stef Coene wrote:

Hi,

For a setup with:
- 4 x LTO3 drives in a IBM 3583 library
- 1 oracle database server: 40GB/1hr archives that needs to backuped (AIX
LPAR) over the SAN
- 1 TSM server (AIX LPAR)

What with the HBA's?  Is it needed to split the tape and disk activity and to
put 4 HBA's in the oracle DB (2 HBA's for disk activitiy and 2 for tape)?

Idem for the TSM server.  2 HBA's or 4 HBA's?


Stef