Hard drive suddenly lost 1/2 size

My external hard drive was 60gb last nite now my computer reads it as 31.4gb, my pc also reads it the same. I had some back up errors so i decided to delete the files on it and format it. well that didnt help, when i run the disk utility it say there is one partiton but i cannot see it? how can i get my hard drive total size back???
please help
mt

I suggest zeroing out the entire disk and then re-formatting it. Sounds like your MBR/partition table got hosed.
~ ( ):>
iMac 233MhZ Biondi blue 96MB of RAM Mac OS X (10.3.9)

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Hard drive suddenly lost 1/2 size

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