linux-kernel - Re: [RESOLVED] Re: Second drive on VT6421

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Message-Id: <1299982461-sup-9653@plc.intranet.plecavalier.com>
Date:	Sat, 12 Mar 2011 21:16:26 -0500
From:	Philippe LeCavalier <support@...cavalier.com>
To:	Krzysztof Halasa <khc@...waw.pl>
Cc:	Alejandro Riveira Fernández <ariveira@...il.com>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [RESOLVED] Re: Second drive on VT6421

Excerpts from Krzysztof Halasa's message of Sat Mar 12 16:06:25 -0500 2011:
> Philippe LeCavalier <support@...cavalier.com> writes:
> 
> > There must be something about that chip...Perhaps the way the firmware
> > allocates the bandwidth. ie 2 channels with a total of 3Gbps then a
> > second drive cannot coexists if the first requests all 3Gbps?!
> 
> I think VT6421(A) is 1.5 Gb/s only.
> To be honest, It was never able to get it to work reliably, esp. with
> Transcend and/or Kingston SSDs.
I'm confident you're right. I just haven't come across any doc outlining
that. Since I resolved this, the drives have been running stable no
issues at all.
-- 
Thanks,
Phil
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