Powerbook G4 HDD Limit

Apple Powerbook G4 model
June 12, 2008 at 12:38:56
Specs: none, PPC/768MB
Hi to all.
I'm repairing a Powerbook G4.
The 80GB original HDD is dead.
I want to buy a new HDD, I know that the Seagate Momentus Series will work on a G4.

I was going to maybe buy an 160GB or 250GB drive, but I don't know the BIOS drive size limit.

How can I found out the HDD size limit of the notebook?


Once upon a time the floppy disk was king.

See More: Powerbook G4 HDD Limit

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June 12, 2008 at 12:50:28
Without looking it up I would guess the BIOS is 28bit. That would limit drive size to 120GB. I am basing that conclusion on the original drive size. Current BIOSes are 48bit, allowing for any currently manufactured drive capacity.

Look at the link below for more info on 48bit LBA compliance.


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June 12, 2008 at 13:42:24
Dunno why I think this but, you may not have that exact issue. For some reason I think that the way the G4 is built doesn't have that limit. I don't know where now I read that.

For what it is worth. See this.

"Best Practices", Event viewer, host file, perfmon, are in my top 10

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June 12, 2008 at 14:26:35
Oh crap, I didn't even realize that the computer is an Apple product. I just looked at the HD size.

I don't have a clue if the same rules apply or not.

I suggest you try emailing Apple or browse their site or forums. The same issue may still apply because the MBoard/BIOS people didn't realize how fast the drive sizes were increasing and got caught short.

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June 13, 2008 at 01:57:25
The 48Bit adressing issue doesn't apply!

According to MAC powerbooks manufactured after 2002 all have 48Bit BIOS.

Also in the link that Sabertooth posted mentions that the Powerbook G4 has no HDD limit.
I'm gonna go with the 250GB.

Thanks too all.

Once upon a time the floppy disk was king.

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June 18, 2008 at 20:50:00
once u looked for HDD firmware for a 30GB 2.5 inch HDD! I hv that firmware update tool from dell. its an iso image, hw will i send you?

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