19 Mar
2007
19 Mar
'07
6:06 p.m.
Point one reminds me of a question I've been pondering. I've got a filer using RAID-DP with 3X14-disk raid groups, and currently 7 spares. Ideally I'd only keep two spares, but I'm still not clear on the pros/cons of adding a 5 disk raid group, effectively only adding three more data disks to the volume.
I'm not in a space crunch currently but I certainly will be at some point. Is it best to leave so many extra spares until I can add a full raid group all at once? Or in my case is it not that important?
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Michael W. Sphar - IS&T - Lead Systems Administrator
SMBU Engineering Support Services, BMC Software
________________________________
From: owner-toasters@mathworks.com [mailto:owner-toasters@mathworks.com]
On Behalf Of Learmonth, Peter
Sent: Saturday, March 17, 2007 6:43 PM
To: Darish Rajanayagam; toasters@mathworks.com
Subject: RE: FAS3020 - aggr best practises.
Hi Darish
Welcome to NetApp and to Toasters!
1. You can do an "aggr add aggr0 56" or use the FilerView GUI and add
all 56 of the new disks into the existing aggregate. You can physically
add the shelves and add them to the aggr while the filer is up and
running. I see no disadvantages, and that is the best practice. (Add
disks in large sets, ideally the raid group size).