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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:

http://www.pc-pitstop.com/sata_enclosures/sat122urd.asp
http://www.pc-pitstop.com/sata_enclosures/scsas16rm.asp

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
this.

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
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