[comp.sys.amiga] Quantum 280 drives

johnl@tw-rnd.SanDiego.NCR.COM (John Lindwall) (07/11/89)

	Anyone out there using Quantum 280 drives on their Amiga?  It is
	a 5.25 half-height 80 MB drive.  I didn't know it existed until
	recently and I'm interested in getting one.  I was looking for a
	Quantum 80 3.5 inch drive, but my enclosure is designed for a 5.25
	drive and I was hoping the 280 would cost less.  I was just told by
	a local dealer that the 280 is no longer produced.  Is this true?

	How long ago did production cease?  Does it have the same specs as
	the 80? (average access time, MTBF, etc)

	As I understand it the 80 (and 40) is rated at 19 ms ave access time
	but it has a read-ahead cache that reduces the ave access time to
	about 11 msec.  Is this true?  How large is the cache?

	I'm going to connect the thing to my A1000 with a Supra controller.
	I also was given a KickStart Eliminator but now that I've read a
	posting about the Comspec controller I wish I had gotten that.
	Apparently the Comspec copies KS to the disk and allows loading of
	KS from the disk image.  Neat!

	One more thing - anyone out there using the Supra 4x4 along with
	a StarBoard II?  I'm worried that I'll get bit by the expansion
	bus problems. :(.

	One more "one more thing" - I grounded the PALS as specified by an
	Amazing Computing article.  I installed 4 jumpers on the Daughter 
	board, but apperntly you must also attach the PALS ground to a 
	ground on the mother board.  Are my PALs grounded OK or not?

	Thanks!

	John Lindwall
	johnl@tw-rnd.SanDiego.NCR.COM

hrlaser@sactoh0 (Harv R. Laser) (07/12/89)

In article <201@tw-rnd.SanDiego.NCR.COM> johnl@tw-rnd.SanDiego.NCR.COM (John Lindwall) writes:
>
>	One more thing - anyone out there using the Supra 4x4 along with
>	a StarBoard II?  I'm worried that I'll get bit by the expansion
>	bus problems. :(.
>
Well, you might. I didn't. A 2Meg Starboard2 is hugging the right
side of my nearly 4 year old A1000 which is itself being hugged by
a Supra 4x4 interface and all 3 of these beige entities get along
just fine. I haven't grounded the PALs. In fact the A1000 I'm
typing on has never been opened. The Starboard's been on 'er since
late '86 and the 4x4 since early '88 and the whole schmere is
powered on 24 hours a day.  No problems. Your mileage may vary. 



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