linux-kernel - Re: limits on raid

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Message-ID: <4677F14A.5060909@cfl.rr.com>
Date:	Tue, 19 Jun 2007 11:07:54 -0400
From:	Phillip Susi <psusi@....rr.com>
To:	david@...g.hm
CC:	Brendan Conoboy <blc@...hat.com>,
	Lennart Sorensen <lsorense@...lub.uwaterloo.ca>,
	Neil Brown <neilb@...e.de>, Wakko Warner <wakko@...mx.eu.org>,
	linux-kernel@...r.kernel.org, linux-raid@...r.kernel.org
Subject: Re: limits on raid

david@...g.hm wrote:
> one channel, 2 OS drives plus the 45 drives in the array.

Huh?  You can only have 16 devices on a scsi bus, counting the host 
adapter.  And I don't think you can even manage that much reliably with 
the newer higher speed versions, at least not without some very special 
cables.

> yes I realize that there will be bottlenecks with this, the large 
> capacity is to handle longer history (it's going to be a 30TB circular 
> buffer being fed by a pair of OC-12 links)

Building one of those nice packet sniffers for the NSA to install on 
AT&Ts network eh? ;)


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