RE: [OT] SCSI drive question

[Kurt_Ludwig student uml edu (Kurt Ludwig)]

The drive will run at the maximum speed of either the drive / controller (whichever one is slower)
so for example if you take an U2W drive and put it on a UW controller it will run at 40MB/s

you can mix drive speeds on anything but U2W / LVD
if you put non LVD drives on the LVD channel the whole channel will run just at UW (non LVD) and will slow the U2W drives down to UW

Kurt
-currently running 4 U2W drives on a UW controller

-----Original Message-----
From: Michael A. Smith [mailto:michael_smith@bigfoot.com]
Sent: Friday, March 03, 2000 11:16 AM
To: axp-list@redhat.com
Subject: [OT] SCSI drive question


[pardon the off-topic post, but you guys know it all!]

I've got a DEC PW433 with a Adaptec 2940UW SCSI card running SuSE-AXP 6.3.
I've currently got an old 2Gb SCSI drive hooked up to it and I want to buy a
new one. My question is about the multitide of SCSI types out there (Ultra
Wide, Ultra2, Ultra2 Wide, etc...).

I know any drive that could possibly work must have a 68-pin connector (like
my current drive). If I see two similar drives: one Ultra Wide and one
Ultra2 Wide (both have 68-pin connectors) can I use either one? I may see no
performace boost if I get the Ultra2 Wide (since my card is only Ultra
Wide), but will I see *lower* performance?

In other words, should I try to match my UW SCSI card with an UW SCSI drive?

TIA
--
Michael A. Smith -- Programmer at Large
Phone:703-625-5732
Fax: 801-650-0853
ICQ: 35884415
:wq

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