ADSM-L

Re: Raid or no?

1998-12-07 14:10:09
Subject: Re: Raid or no?
From: Doug Thorneycroft <dthorneycroft AT LACSD DOT ORG>
Date: Mon, 7 Dec 1998 11:10:09 -0800
We run 3 18.2 GB drives set up for raid5, used for our storage pools,
database and log files. Everything works fine, but we haven't tested to
see how much performance gain we would get with multiple independent
drives.

Adam Slesinger wrote:
>
> Fellow Adsmers,
>
> We are starting to set up adsm and we are trying to decide whether or
> not to set up our eight 9GB drives as a raid array or whether we should
> treat them as regular disks.  The adsm consultant says that it would be
> best to put the database and log on one disk and then, through adsm,
> have it mirrored on another disk.  The remaining 6 disks would be used
> for the client data which would be migrated to tape soon after going to
> disk.  The other option is to set 7 disks in a raid array and have the
> eight as a hot spare.  I am under the impression that this option is not
> recommended by IBM but cannot be sure.  Has anyone out there had
> experiences using a raid array as a primary storage pool?  Thanks!
>
> adam
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