Steve said "one volume per head", which means the Clustered pair must always have a minimum of two volumes. With a single volume per filer (root volume), each filer is active and serves data from its designated volume. If there is a takeover, then the remaining filer serves data from both volumes.
You can have a "hot spare filer", by creating a small root volume on one filer and not have that filer serve any data, but as you say, two volumes each of which has data to be served will give you the best bang for the buck.
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-----Original Message----- From: July at Zerowait [mailto:july@zerowait.com] Sent: Monday, April 17, 2000 8:05 AM To: Watanabe, Steve Cc: 'ari@genuity.net'; toasters@mathworks.com Subject: Re: Filer volume configuration question
Now I am confused. If there is only one volume, then what you have is essentially a "hot spare filer" for failover. Surely setting up two volumes lets you use both filers actively and gets you more bang for the buck? While a single volume cluster might work, is it really the recommended config?
July
"Watanabe, Steve" wrote:
Hi Ari, A cluster requires a minimum of one volume per head. So
having a 6 disk
vol0 and a spare per node is fine. Make sure that you follow
the directions in
the cluster configuration guide carefully to avoid any
situation where both
nodes are cabled incorrectly allowing access to the same volume
at the same
time. In fact, I thought NetApp always did the initial cluster configuration. Is that option available to you? -Steve
-----Original Message----- From: Ari [mailto:ari@genuity.net] Sent: Monday, April 17, 2000 5:31 AM To: toasters@mathworks.com Subject: Filer volume configuration question
Hi,
I am setting up a pair of clustered 740's for the first
time and have a
question.
Each filer currently has one disk shelf. 6 of the disks
are in the root
volume, /vol/vol0, and the 7th is a hot spare. Is this
configuration OK
for a clustered pair? I was told by someone that for a
cluster, I would
need 2 distinct volumes on each head, although I am not
entirely sure why.
If that is the case, how do I remove drives from the root
volume so that I
can add them into a newly created volume?
Any help is greatly appreciated.
Ari
Ari Globerman
eBusiness Web Hosting Services e-mail: ari@genuity.com mailto:ari@genuity.com phone: 617-873-5843 fax: 617-873-4033
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July A. J. Linett, VP Tech Mktg 302.266.9408 july@zerowait.com
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