[Sussex] question on PCMCIA scsi adapters

[Steve Dobson]

Charles

On Fri, Feb 27, 2004 at 11:39:37AM +0000, Charles_Thorns at veritasdgc.com wrote:
> Does anyone know of a PCMCIA Ultra wide differential SCSI adapter, ie
> a laptop equivilent of the adaptec 2944UW PCI card?

>From Dabs [1] the spec of the 2944UW is a "Ultra Wide SCSI" host adaptor
so it is compatible.

But what do you mean by "equivalent?"  I assume transfer rates.

A PCMCIA card (spec 2.1 [2]) for 16-bit interfaces has a maximum clock
speed of 10MHz and is therefore only cable of speeds of up to 20MBps
which is half the speed of the 40MBps of SCSI-2.

If you need to connect a SCSI disk via a PCMCIA interface try and use
the 32-Bit (CardBus) versions, as this interface can run at speeds of
20 - 33 MHz with a peak transfer rate of 132Mbps.

Steve

[1]
http://www.dabs.com/uk/productview?quicklinx=F8V?refererid=t5
http://www.quatech.com/support/comm-over-pcmcia.php

[2]
http://www.quatech.com/support/comm-over-pcmcia.php