Date: Tue, 31 Jul 2001 11:39:55 -0700 From: James Satterfield <jsatterfield@intertrust.com> To: stable@FreeBSD.ORG Subject: RE: PERC 3 Dell 2500 and FreeBSD 4.3 stable Message-ID: <720AE932C238D411B4D100C04F10DA6B0222BA6B@exchange.epr.com>
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# Begin rambling
The Perc 3QC is an AMI Enterprise 1600 card. I've got two of them. They both
suck. =)
I've done a LOT of disk IO benchmarking with the Perc 3Di and 3QC cards in
the last few months. Awful results. If anyone is interested, I could send
them some of my findings (and a few things Dell has said about the
performance). Basically, I ended up removing the QC cards, installing a few
2 channel ultra160 cards, and running software raid because the hardware
solution was so poor. It was very nice of Dell to start including a branded
version of Veritas Volume Manager as their array management solution.
# End rambling
James
-----Original Message-----
From: Mike Smith [mailto:msmith@FreeBSD.ORG]
Sent: Tuesday, July 31, 2001 1:08 AM
To: Kevin Oberman
Cc: Tim Kellers; stable@FreeBSD.ORG
Subject: Re: PERC 3 Dell 2500 and FreeBSD 4.3 stable
> Here is a summary of PERC hardware from Mike Smith who did most (all)
> of the driver work for them:
> The PERC, PERC 2/SC, PERC 2/DC and PERC 3/D* are AMI designs.
>
> The PERC 2/Si, PERC 2/Di, PERC 3/Si and PERC 2/QC are Adaptec designs.
>
> "PERC" means "this is a Dell-branded RAID controller".
> "2" and "3" refer to 40MHz vs 80MHz SCSI support.
> "S" "D" and "Q" are single, dual and quad channel designations.
> "i" means it's integrated onto the server motherboard.
> "C" means it's an addin card.
> "L" means it's the low-cost version.
Just to amend this; the 3/DC is an AMI controller, but the 3/Di is an
Adaptec design.
Another way of looking at it is that if it's an 'i', or a QC, it's an
Adaptec. Otherwise it's an AMI. Knowing Dell, though, this may change
again without too much notice. 8(
--
... every activity meets with opposition, everyone who acts has his
rivals and unfortunately opponents also. But not because people want
to be opponents, rather because the tasks and relationships force
people to take different points of view. [Dr. Fritz Todt]
V I C T O R Y N O T V E N G E A N C E
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