ADSM-L

Re: Number of HBA's

2005-02-08 15:33:04
Subject: Re: Number of HBA's
From: Orville Lantto <orville.lantto AT DATATREND DOT COM>
To: ADSM-L AT VM.MARIST DOT EDU
Date: Tue, 8 Feb 2005 14:32:40 -0600
Don't forget drive compression when making throughput calculations!  80
MB/sec * 4 (compression of text data) =320 MB/second as the maximum
available bandwidth  per LTO-3 drive.

Good Luck keeping ONE of these beasts streaming with high compression!



Orville L. Lantto
Datatrend Technologies, Inc.  (http://www.datatrend.com)
IBM Premier Business Partner
121 Cheshire Lane, Suite 700
Minnetonka, MN 55305
Email: Orville.Lantto AT datatrend DOT com

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Ben Bullock <bbullock AT MICRON DOT COM>
Sent by: "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>
02/08/2005 02:10 PM
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"ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>


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Subject
Re: Number of HBA's






                 The documents say you are supposed to NOT have SAN and
tape
devices running on the same HBAs.

                 I would expect you would use 2 HBAs to connect to the SAN
and 2
to connect to the tape drives. 2 cards have more than enough bandwidth
to support the 4 LTO3 drives.

Ben


-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of
Stef Coene
Sent: Tuesday, February 08, 2005 1:03 PM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Number of HBA's

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

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