[rescue] rescue Digest, Vol 50, Issue 10

[J. Alexander Jacocks]

Michael Parson <mparson at bl.org> wrote:
>>> From: Michael-John Turner <mj at turner.org.za> Date: 2007/01/08 Mon AM
>>> 01:45:21 CST To: The Rescue List <rescue at sunhelp.org> Subject: Re:
>>> [rescue] some stuff I'm trying to find
>>
>>> On Sun, Jan 07, 2007 at 11:48:13PM -0500, John Floren wrote:
>>>
>>>> Second, I'm looking for a SCSI drive to go in a DEC Multia. It
>>>> sounds like a 50-pin drive should do it; if anybody in the area has
>>>> a few to part with, please contact me.
>>>
>>> If you want an internal drive, it'll have to be 2.5"
>>> SCSI. Alternatively, you should be able to hookup any drive in an
>>> external case that you can connect with a narrow SCSI connector.
>>
>> The multia supported 50 pin, 1" "regular" SCSI drives if the proper
>> chassis is involved - there was a PCI chasis and a SCSI chassis. One
>> could accomodate a short PCI card, the other would accept a 3 1/2"
>> SCSI drive. I guess if you could live with the poor IDE performance,
>> you could use a 3 1/2" IDE drive with the appropriate 44 pin to 40 pin
>> adapter cable in a SCSI chassis...
>
>Ah yes, that rings a bell.  My Multia had the PCI chassis and I used
>all external drives.
>
<snip>

Several notes on Multia:

1) be _careful_ of internal heat.  It's very easy to cook a Multia with a
modern 3.5" SCSI HDD.
2) you can also use any of the SCSI-ATA 2.5" bridge modules with ATA 2.5"
9.5mm disks.  This is much cheaper, and gives access to better drive
density, than 2.5" SCSI disks.
3) you can't boot from IDE on the multia
4) not all PCI cards work, due to aligned access problems on Alpha

Therefore, I suggest, if you use 3.5" disks, with the non-PCI chassis, that
you use 5400rpm disks.  My best recommendation is to use 4200rpm laptop 2.5"
9.5mm ATA disks, for less voltage and less heat dissipation.

Good luck!

-- 
bc3c: there are only a few things people really want... food, shelter, and
no ED