culhane@vis.toronto.edu (Sean Culhane) (01/07/91)
(Sorry for posting this to both c.s.a and c.s.a.h without cross-posting,
but the mailer here gets easily confused.)
Hi. I have 2 questions regarding the 2091 controller. (my 2000HD came with
a 2091, but _no_ documentation for it!) *ANY* help whatsoever will be
greatly appreciated.
1) In 2 days I'll have a second hard drive (Quantum 105 Prodrive) to add
to my 2091 (my original drive is in one of the 3.5" bays, and I'll be
putting the new drive on the 2091 itself). My questions is: do I
have to run a cable from the outside of the Amiga to the second drive
or can I daisy-chain the two drives within the Amiga itself??? If so,
how do I daisy-chain them?? (the 2091 only has one place for a 50 pin
ribbon cable ... do I need some sort of pass-through cable adapter???)
If not, do I just need a standard 25-50 pin cable??? Please excuse my
ignorance if this question seem naive to you.
2) It was pointed out to me that several months ago there was some
discussion in c.s.a.h that the 2091 might have some problem handling
more than 1 drive. Could somebody please summarize the main points
of this discussion for me. If it's any help, the ROMs on my 2091
read V5.92.
Thanks for your time.
Sean.
--
o
_ /-_
(_)>(_) sean. (culhane@vis.toronto.edu)jesup@cbmvax.commodore.com (Randell Jesup) (01/10/91)
In article <91Jan7.103150est.8481@orasis.vis.toronto.edu> culhane@vis.toronto.edu (Sean Culhane) writes: > 1) In 2 days I'll have a second hard drive (Quantum 105 Prodrive) to add > to my 2091 (my original drive is in one of the 3.5" bays, and I'll be > putting the new drive on the 2091 itself). My questions is: do I > have to run a cable from the outside of the Amiga to the second drive > or can I daisy-chain the two drives within the Amiga itself??? If so, > how do I daisy-chain them?? (the 2091 only has one place for a 50 pin > ribbon cable ... do I need some sort of pass-through cable adapter???) > If not, do I just need a standard 25-50 pin cable??? Please excuse my > ignorance if this question seem naive to you. You can put the new 3.5" drive in the 5.25" bay (make or get brackets to fit 5.25" rails, or leave it loose until then). You may need a power- splitter to get power to it. As for cabling, add a second connector to the scsi cable and plug it in. Note that only the last SCSI drive in the chain should have the resistor packs installed (though it'll work over-terminated, it isn't really good to leave it that way). These are the socketed resistor packs right by the scsi connector. If you mount it externally, you'll need some sort of 25->50 pin connector, as well as a case/power supply. There are Mac 25->50 pin centronics connectors easily available, then wire up a centronics 50-pin to the 50-pin dip. Leave the terminators in on the last drive outside the case again. > 2) It was pointed out to me that several months ago there was some > discussion in c.s.a.h that the 2091 might have some problem handling > more than 1 drive. Could somebody please summarize the main points > of this discussion for me. If it's any help, the ROMs on my 2091 > read V5.92. You may find it useful to turn off reselection for the drive when you set it up with hdtoolbox (define drive type). You may have to turn off reselection on the other drive as well - careful, this wipes your partitioning information, which you then have to reenter exactly the same as it was before saving the changes to the drive. -- Randell Jesup, Keeper of AmigaDos, Commodore Engineering. {uunet|rutgers}!cbmvax!jesup, jesup@cbmvax.commodore.com BIX: rjesup The compiler runs Like a swift-flowing river I wait in silence. (From "The Zen of Programming") ;-)