Apple SCSI TermPWR; Was Re: This is funny (ebay)

From: Tothwolf <tothwolf_at_concentric.net>
Date: Sun Feb 24 04:35:27 2002

On Sun, 24 Feb 2002, Doc wrote:

> I have a number of older Seagate Hawk narrow SCSI 1G-2G drives. I have
> a couple of LC 475s, the SE/30, and a IIci. I've never gotten one of
> the Seagates to work as the internal drive on any of the older Macs
> without using a cable terminator. I've tried term power to drive, to
> bus, from bus, and IIRC, one of the 1G Hawks allows term power both to
> the drive and from the bus. Never works. Terminated cable always
> works.
> "Somebody 'splain this wonderment to me!"

Maybe the drive has no built-in terminator? A terminator always needs
power on the bus to terminate the connection, which is what the various
termpower jumpers can provide. Ideally, all devices should be providing
termpower, but not all SCSI setups will work with that.

-Toth
Received on Sun Feb 24 2002 - 04:35:27 GMT