R510 question - how many volumes supported on Perc H700?

Andrew Geiger andrew_geiger at tstna.com
Wed May 19 18:43:22 CDT 2010

The H700 supports up to 64 virtual disks per controller.  So the issue
is with the config tool.




Andrew Geiger 
MIS Administrator 
TS Trim Industries, Inc. 


From: linux-poweredge-bounces at dell.com
[mailto:linux-poweredge-bounces at dell.com] On Behalf Of Wiley Sanders
Sent: Wednesday, May 19, 2010 7:35 PM
To: linux-poweredge at dell.com
Subject: R510 question - how many volumes supported on Perc H700?


This is really a pre-sales question, but I have not been able to find a
sales person who can answer this question.

We're think of buying an R510 to use as a massive 7000+ user mail spool.
I would like to configure the 12 internal SAS disks as 6 RAID1 volumes.
(Please I am set in this decision. We cannot afford a SAN, I want to
maximize write performance , minimize RAID rebuild time, and the app
lends itself well to 6 individual volumes.)

The online configurator will only allow me to configure a 12-disk with
the H700 and "two sets of Raid 1", "Raid 1 with exactly two hard drives
and RAID 5 minimum three hard drives", "RAID 5 minimum/maximum four hard
drives and Raid 10 minimum four hard drives, maximum depends on
backplane [??]"

Is this just a limitation on the preconfigured RAID configs I can order,
a licensing restriction, or a true limitation on the number of volumes
that the H700 can support?

I suppose I could go with one or two big RAID 5 volumes but I want to be
able to get 500 or 600 iops small write performance and less than half a
day RAID rebuild time. If anyone is getting those kinds of numbers from
an H700 with RAID5, let us know, that would be helpful. I'm also willing
to install a 2nd controller if it can be connected to the hot-swap SAS

-Wiley Sanders

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