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OK, this is a new one for me... iBook refuses to boot in TDM
Posted by: PeterB
Date: January 12, 2006 06:40PM
This is one my (many) clamshells -- was having trouble with the hard drive, and it boots fine from the CD, but won't boot in target disk mode-- if hold down the "T" key, it just shuts down (sounds like it makes a "hard drive spindown" sound right before it shuts off). So far, I've tried the following, none of which have helped:

1) Zap PRAM
2) Reset NVRAM
3) PMU reset
4) Checked firmware; it says it's up to date

What do you guys think?




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Re: OK, this is a new one for me... iBook refuses to boot in TDM
Posted by: rexrzer
Date: January 12, 2006 06:46PM
Hi PeterB!

Have you checked the FireWire port(s)? Logic would have it that you may be having a FireWire issue. That's the 1st thing I would check. Hook up a FireWire HDrive or DVD/CD burner to it and see what happens. They do have FireWire, right?

______________



What's the difference between reality and fiction? Fiction has to make some sense.
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Re: OK, this is a new one for me... iBook refuses to boot in TDM
Posted by: PeterB
Date: January 12, 2006 07:01PM
Hi rex,

I just checked -- Firewire port is fine (yes, it does have one, otherwise I wouldn't be trying to use TDM!)

Also, forgot to mention in the original post -- I ran the Apple Hardware Test CD, both the regular and extended tests, and it passed everything...




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Curiouser and curiouser
Posted by: PeterB
Date: January 12, 2006 10:06PM
OK, I think I found the answer to my own question (sort of)...

I found this article: [docs.info.apple.com]

... then I checked with Apple Sys Profiler, and sure enough, the hard drive is listed as internal ATA 2, whereas the optical drive is ATA 0. This is one of the machines I upgraded with a new hard drive and a Combo drive, and I didn't change anything as regards the connections... so I'm wondering how it turned out that the hard drive is no longer on the ATA 0 bus??? (Maybe it has something to do with a master/slave problem?)




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Re: OK, this is a new one for me... iBook refuses to boot in TDM
Posted by: BigGuynRusty
Date: January 12, 2006 10:20PM
Jumpers.

BGnR
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Re: OK, this is a new one for me... iBook refuses to boot in TDM
Posted by: PeterB
Date: January 12, 2006 10:34PM
BGnR, how should jumpers change to which bus a device is attached? Yes, it changes whether a given device is master/slave on a particular bus, but not the bus itself, I would have thought...)




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Re: OK, this is a new one for me... iBook refuses to boot in TDM
Posted by: PeterB
Date: January 12, 2006 11:06PM
Hmmmm...

This gets even MORE curious.

I just checked on three clamshells...

The problem one is set up like this:

ATA 2 - Hard drive - ID = 1
ATA 0 - Optical drive - ID = 1

An unmodified (no upgrades) one looks like this:

ATA 2 - Hard drive - ID = 0
ATA 0 - Optical drive - ID = 0

On this one, TDM works fine.

Another one which I've upgraded looks like this:

ATA 2 - Hard drive - ID = 0
ATA 0 - Optical drive - ID = 1

On this one, TDM also works fine.

So now, I'm not sure what to make of this -- the "hard drive must be on ATA 0" thing, I wonder if that's really what the problem is, seeing as how both of the other machines have the hard drive on ATA bus #2. I'm not sure what the ID is, if that's master/slave, and if that might explain what the problem is...




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