ADSM-L

RAID Levels for *SM volumes

2000-09-25 10:42:42
Subject: RAID Levels for *SM volumes
From: Timo Kilchenmann <timo.kilchenmann AT EURODIS DOT CH>
Date: Mon, 25 Sep 2000 10:52:17 +0200
Dear all,

I need advice which RAID Levels (RAID0, RAID5, non-RAID) one should use for
best performance/availability:

TSM DB Volumes
TSM Log Volumes
TSM Diskpool Volumes

As far my knowledge goes about TSM I know that I should place the DB on one
disk and the log on another disk with TSM mirroring or hardware RAID1. This
is common practice for all DB's.

I am pretty unsure about the diskpool volumes. Will the client sessions
generate large sequential writes (non-RAID) OR will there be random writes
in place (RAID0).

Hardware: IBM RS/6000 with SSA disks.

Any help appreciated!

Eurodis Schweiz AG
Data Division
Timo Kilchenmann
Systems Engineer
-----------------------------------------------------------
Timo Kilchenmann     E-Mail  timo.kilchenmann AT eurodis DOT ch
Timo Kilchenmann     E-Mail  timo.kilchenmann AT eurodis DOT ch
Eurodis Schweiz AG   Phone   +41 1 843 34 91 (direct)
Bahnstrasse 58/60    or      +41 1 843 32 32
CH-8105 Regensdorf   Telefax +41 1 843 34 24
Switzerland          Mobile  +41 79 417 43 55
                     http://www.eurodis.ch
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