MDD (867DP): finder says drive is 500GB, Disk Utility says it is 31GB, why?

Hello,
I am confused. I just popped a brand new 500GB drive in my MDD for storage, but Disk Utility saw it as a 31GB drive, so i put it in a FireWire enclosure and formatted it at 500GB on my MBP, then popped it back in the MDD and the Finder now sees it as 465.22GB available, but the System Profiler and Disk Utility still see it as 31.37GB (Profiler says specifically that Capacity: 31.27GB, Available 464.22GB).
I have tried booting from the 10.4 disk and running disk utility from there, and it is the same. booted to another partition with 10.3 on it. I swapped the caddys around (as http://www.everymac.com/systems/apple/powermacg4/stats/powermac_g4_867_dpmdd.html suggests there are two busses, one at ATA66 and one at ATA100, but i can find no reference to which is which), and get no change in behaviour.
The question is, I guess, whether this arrangement is safe to use, or whether I should try a slightly smaller drive (I have a 350GB sitting next to me, too).
Cheers,
t

It sounds like you have the capacity limitation jumper installed, which reduces the drive's capacity to 32 GBs. This outdated feature was incorporated years ago to accommodate pre-1999 PC BIOS limitations for detecting larger drives. Remove the jumper and reformat the drive. The ATA-100 bus connection is on the left side of the motherboard, close to the rear of the computer. The ATA-66 connection is on the left side at the front of the motherboard, to the right of the slower ATA-33 connection used by the optical drive. If both hard drives have the jumper set for Cable Select (CS), you'll have no problems with dual drives connected to the same bus.

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Message was edited by: jazmyn96

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Hi there. Any help would be most gratefully received.
I have a Power Mac G5 Dual 2Ghz with 2GB RAM, one internal HDD (250GB serial ATA 7200rpm - the original one), two external HDDs and a Philips 170B display, running (or not) MacOS 10.39.
It was working fine yesterday but on startup this morning it hung for a while on the grey Apple logo and progress "clock" then froze on a blue screen.
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http://www.apple.com/support/powermac/

MDD (867DP): finder says drive is 500GB, Disk Utility says it is 31GB, why?

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