external-disksnow leopard
I purchased a 3TB HDD, which I put into an USB enclosure for my iMac. The drive is recognized at boot, but it only shows 801.23GB.
I formatted the drive with into two 1.5TB FAT32 partitions via Win7. My Windows machine shows the correct partitions, but when I attach the enclosure to my iMac it shows one 801.23GB partition.
Do you have any idea?
If your USB hard drive is the bus-powered variety (that is, you don't plug it into the wall for power), then it is possible that it is requiring too much startup current to run on one of your computers.
Some computers are pickier than others about how much current a device can draw, and over what period.
You might try a cable like this:
Basically, you can use power from two USB ports, instead of just one.
If your hard drive has a jack for a power adapter, use that instead.
If only we've searched before buying we would find this drive has this problems. It seems it lies either in firmware of enclosure or in firmware of a disk used inside. I didn't find FW updates for it on Samsung support site (but they have a habit to hide such stuff).
Probably, you may upgrade FW for the disk used inside enclosure and it could help but no guarantee.
If you can get your money back just do it because it seems this product is faulty (it probably behaves the same under Windows (you may try it if you could)).
If you can't get your money back or exchange it try this solution from MacOSXHints.
Best Answer
I have no idea why the Mac can't see the 2 partitions.
Try using Disk Utility on the Mac to format the drive with FAT 32, then give it 2 partitions, and see if the Windows likes it.
That's the best I can come up with. It works with thumb drives.