iBook install: failing to see hard drive

[gremio@ai.mit.edu]

Dear developers,

First, may I ask that you keep me in the cc: in replies in lieu of my 
subscribing?  Thanks!

I'm a newbie who enjoys debian and got sick of os x, but am having trouble
installing debian for the first time.  I have an iBook 600 MHz (with ATI
rage video card, in case that helps identify the model), and a brand new
set of stable potato powerpc disks, and have tried booting with the
'install', 'install24', and 'install24-safe' options (uname says
2.4.18-newpmac), which all result in the same behavior:

The installer boots fine, but claims I have no hard drive.  If I follow the 
normal boot process then it boots happily from the hard drive, so this 
isn't a simple hardware failure.  A possibly helpful excerpt from dmesg:

Uniform Multi-Platform E-IDE driver Revision 6.31
ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
IN from bad port cfc at c00f5598
[many of the same ... then]
IN from bad port c000 at c00f56ac
IN from bad port c100 at c00f56ac
IN from bad port c200 at c00f56ac
IN from bad port c300 at c00f56ac
IN from bad port c400 at c00f56ac
IN from bad port c500 at c00f56ac
IN from bad port c600 at c00f56ac
IN from bad port c700 at c00f56ac
IN from bad port c800 at c00f56ac
IN from bad port c900 at c00f56ac
IN from bad port ca00 at c00f56ac
IN from bad port cb00 at c00f56ac
IN from bad port cc00 at c00f56ac
IN from bad port cd00 at c00f56ac
IN from bad port ce00 at c00f56ac
IN from bad port cf00 at c00f56ac
pmac_ide: enabling IDE bus ID 2
loop: loaded (max 8 devices)


Is there a magic incantation, say idebus= some other two digits, that might 
make things better? 

Very many thanks,
Gremio

-- 
   ..------~~~--.__     Gregory Adam Marton
  /               c~\	Graduate Student, Natural Language Understanding
  /             \__ `\  
  |  /~~--__/  /'\ ~~'  Gremio @     acm.org     mit.edu     ai.mit.edu
 /'/'\ |    | |`\ \_    
`-,)  `-,)  `-,) `-,)   There is no such thing as an original sin.