Re: 5.25" Disk drive problem (PLEASE HELP!)

[dempson@swell.actrix.gen.nz (David Empson)]

In article <1993May7.121204.11051@klaava.Helsinki.FI> cust_ts@klaava.Helsinki.FI (Tero Sand) writes:
>  
> So, I daisy chained the two 5.25" drives to the port of the GS, and
> then I chained the two 3.5" drives from the second 5.25" drive. Both
> 5.25" drives worked perfectly, but the 3.5" drives were dead - even the
> eject button didn't work. I exchanged the two 5.25" drives, and they
> still both worked, but the 3.5" drives were also still dead. Can
> anybody explain or, better yet, offer a solution? I don't suppose there
> are any controllera out there that accept tvhe daisy-chainable 5.25"
> drives?

Easy solution to this problem:

When chaining 3.5" and 5.25" drives from the IIgs drive port, the 3.5"
drives must go FIRST.

If you have a UniDisk 3.5 drive, it must be connected after any Apple
3.5 Drives and before any 5.25" drives.

This is documented in the "Setting up your IIgs" book that comes with
the computer, and is also mentioned in Chapter 12 (Troubleshooting) and
Appendix A (Connecting Additional Devices) of the ROM 03 "IIgs Owners
Reference".  I can't find any mention of the required order in the the
ROM 01 "IIgs Owners Guide".

The 5.25" and UniDisk 3.5 drives don't pass through all the signals
required by Apple 3.5 drives.
-- 
David Empson                                                               
dempson@swell.actrix.gen.nz    <--- Note my new E-Mail address!            
Snail mail: P.O. Box 27-103, Wellington, New Zealand