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Re: How to configure 36 disks ?

To: Jon@xxxxxxxxxxxxxxx
Subject: Re: How to configure 36 disks ?
From: Greg Freemyer <greg.freemyer@xxxxxxxxx>
Date: Mon, 23 Mar 2009 12:45:23 -0400
Cc: Raz <raziebe@xxxxxxxxx>, Bill Davidsen <davidsen@xxxxxxx>, linux-fsdevel@xxxxxxxxxxxxxxx, Linux RAID Mailing List <linux-raid@xxxxxxxxxxxxxxx>, linux-xfs@xxxxxxxxxxx, linux-aio@xxxxxxxxx, "linux-ide@xxxxxxxxxxxxxxx" <linux-ide@xxxxxxxxxxxxxxx>
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On Mon, Mar 23, 2009 at 12:02 PM, Jon Hardcastle
<jd_hardcastle@xxxxxxxxx> wrote:
> I'd like to understand how you even go attaching that many devices to a 
> system.. I am 'comparatively' new to this.. and have a 6 raid5 system.. not 
> enterprise.. and i have slammed into case/power/sat slot issues already. What 
> sort of hardware must one use to grow to a 36 array system!

For the drives you could get a few big enclosures:


I don't think these offer PMP (port multiplexer) support.  I would
look for ones that did if you're serious about doing something like

If you used PMP with 4x drives per sata port, you would only need 9
sata ports in the PC to control the 36 drives.  Not sure what the
limits of PMP is, but 4x seems reasonable to me.

Greg Freemyer
Head of EDD Tape Extraction and Processing team
Litigation Triage Solutions Specialist
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