Re: Apple SCSI cards term power

[Randy Shackelford <shack@onyx.southwind.net>]

David Empson <dempson@actrix.gen.nz> wrote:

:> Does anyone know if the hard drive inside the HD80SC case provides
:> termination power?

: It probably does.  Hard drives sold by Apple which were potentially used
: as an external drive on the Mac Plus and Apple II would have to supply
: termination power.

Yep, I'd expect the enclosure to do it for that reason.

:> I am going to buy another HD**SC case and a much bigger hard drive to
:> replace whatever drive is inside it.  I am currently planning to buy an
:> Apple labelled 500MB HD out of a Macintosh.  Does anyone know if
:> these drives provide termination power?

: Possibly not.  Most Mac models after the Plus supply termination power
: from the motherboard, so there is no need for the drive to do it.

: Some drive manufacturers arranged things so that their drives always
: supplied termination power.  So far both my Quantum drives (LPS240 and
: Trailblazer 850) have done.  Apple used Quantum for a fair number of
: their internal drives, so you might be lucky.

I'm more accustomed to power coming from the enclosure. I have some APS 
SR2000s with their digital active termination and one of their old ZFP
styles too. On it, there is a wire running directly from the power supply
to one pin on the Centronics connector. That could have only one purpose.
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