> The Seagate drives ending in "LW" can be connected (via a
> simple adapter)
> to the standard Single Ended SCSI on a "standard" HP 3000.
> (We have such a one
> installed, the adapter is inside the external case we put the
> drive in.)
> (This conversion is possible because Low Voltage Differential is
quite
> a different beast than the older "Differential")

As can any non-differential "W" model. For best results, use device
converters; if you use a cable converter, make sure you buy quality
68-to-50-pin converters that terminate the upper conductors.

> There may be other interfaces that can be connected via adapters...
> but don't ask *me*!  (I dimly recall trying to convert an LC (SCA)
> with no success...but I'm not sure that's what it was.)

That works too; SCA drives can be attached to 50- or 68-conductor
cabling with adapters. However, the adapters I've seen don't have any
retention devices to keep them firmly plugged into the drive, so I'd
hesitate to use them in critical application (which is why the 3 I
have are in my 3rd-string box; if it goes down, nothing is lost).

And there are adapters to connect Differential devices to SE busses
and vice versa. It seems that pretty much any kind of SCSI device can
be connected to any other with the appropriate intermediary hardware.

> If you have a F/W Differential SCSI card, then you can use the
> drives ending in WD.  I don't know anything about using other
> interfaces, however.

Or "D" drives, with a 68/50 device converter.

> I used to recommend buying cases (for external drives) from Granite
> Digital, but they now use the same cheap ones that everyone seems
> to use :(   (I'd like to find a better made case, with better fans,
> but under $150))

http://www.ci-design.com


Steve Dirickson   WestWin Consulting
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