From: Dave Cramer <pg@fastcrypt.com>
To: Vivek Khera <vivek@khera.org>
Cc: Merlin Moncure <mmoncure@gmail.com>
Cc: Pgsql performance <pgsql-performance@postgresql.org>
Subject: Re: Dell Hardware Recommendations
Date: Mon, 13 Aug 2007 20:59:26 -0400
Message-ID: <4A971E01-CDF8-4EA0-AC90-B1CDD968DF48@fastcrypt.com> (raw)
In-Reply-To: <C8946E64-F274-4D86-BAB4-30CADD830103@khera.org>
References: <46BB6F3D.6090608@gmail.com>
<E519A947-4DEC-448D-BA86-E3B0471C3968@khera.org>
<b42b73150708101336t3823e373he4835aa9564270fb@mail.gmail.com>
<C8946E64-F274-4D86-BAB4-30CADD830103@khera.org>
On 13-Aug-07, at 9:50 AM, Vivek Khera wrote:
>
> On Aug 10, 2007, at 4:36 PM, Merlin Moncure wrote:
>
>> I'm not so sure I agree. They are using LSI firmware now (and so is
>> everyone else). The servers are well built (highly subjective, I
>> admit) and configurable. I have had some bad experiences with IBM
>> gear (adaptec controller though), and white box parts 3ware, etc. I
>> can tell you that dell got us the storage and the server in record
>> time
>>
>> do agree on adaptec however
>
> Ok, perhaps you got luckier... I have two PowerVault 220 rack
> mounts with U320 SCSI drives in them. With an LSI 320-2X
> controller, it *refuses* to recognize some of the drives (channel 1
> on either array). Dell blames LSI, LSI blames dell's backplane.
> This is consistent across multiple controllers we tried, and two
> different Dell disk arrays. Dropping the SCSI speed to 160 is the
> only way to make them work. I tend to believe LSI here.
>
This is the crux of the argument here. Perc/5 is a dell trademark.
They can ship any hardware they want and call it a Perc/5.
Dave
> The Adaptec 2230SLP controller recognizes the arrays fine, but
> tends to "drop" devices at inopportune moments. Re-seating dropped
> devices starts a rebuild, but the speed is recognized as "1" and
> the rebuild takes two lifetimes to complete unless you insert a
> reboot of the system in there. Totally unacceptable. Again,
> dropping the scsi rate to 160 seems to make it more stable.
>
>
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To: pgsql-performance@postgresql.org
Cc: pg@fastcrypt.com, vivek@khera.org, mmoncure@gmail.com
Subject: Re: Dell Hardware Recommendations
In-Reply-To: <4A971E01-CDF8-4EA0-AC90-B1CDD968DF48@fastcrypt.com>
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