I've been using 5, 10, 20, and 40 Mbit single-ended SCSI for years
with many different adapters and operating systems and understand all the
termination issues. That being said, I had a to replace a 4.5gig UW
device that was on verge of crashing, and the cheapest deal was one
of the new Ultra2, or LVD, drives. Now most U2W drives can run in
"UW, single-ended" compatibility mode, right? This one seems to,
as per both the IBM docs (it's a Ultrastar 18ES, DNES-309170), but
the new thing I learned was that these drives don't retain the
ability to terminate the bus themselves. Instead, you must provide
internal termination on the last plug of the ribbon cable--something
I've never done before.
I was going to order a terminator (right now, I just have the old
disk, thrashing away it's last few days of life to terminate the bus),
but I was confused by what I need. In terms of 68pin, internal
terminators, they sell
- single-ended, passive terminator
- single-ended, active terminator
- LVD, multi-mode terminator
- LVD, single-mode terminator
I'm only running the drive in single-ended mode, so a single-ended,
active terminator would work, right? If I get an LVD controller
someday, would I use one of the LVD terminators? Is there a terminator
I can buy today that will work in both single-ended and LVD
applications?
Thanks,
Brendan
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