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.
>
>
> ---------------------------(end of
> broadcast)---------------------------
> TIP 4: Have you searched our list archives?
>
> http://archives.postgresql.org