On 30 Nov 98 at 18:50, Dennis Thiel wrote:

> I have an Ultra SCSI PCI adapter with 50 pin internal connector.
> If I buy a 68 pin SCSI hard drive can I use a 68 to 50 adapter to
> connect it to my card? Will I lose any functionality on the hard
> drive? Any problems I should be aware of?

  You *may* lose a little bit of throughput.  A 68-pin ("wide")
interface is able to move 16 bits of data at a time, but a 50-pin
interface only moves 8 bits of data.  Ultra SCSI (50-pin) provides up
to 20 Mbps, whereas Ultra Wide can go to 40.
  The thing is, these bandwidth numbers are higher than any single
drive made needs.  Odds are that you'll never use up your SCSI
bandwidth until you add multiple fast devices.
  So go for it.

  Oh, one other thing:  The 68-pin drive will have four bits for
"device ID".  Only three of these are connected through the 50-pin
interface.

David G

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