Re: need advice on seeing 250GB drive

"Franc Zabkar" <fzabkar@xxxxxxxxxxxxxxxxx> wrote...

The BIOS is NOT irrelevant. Some older hardware just won't support the
larger drives. I had a similar problem with an old external USB drive.
The interface would not recognize a new 300 GB HD. Bought a new
enclosure,
and it worked fine.

I don't understand this. Why should a USB interface limit the visible
capacity of a HDD?

If the firmware doesn't support 48-bit LBA (logical block addressing), the
max it can see is 137 GB. Whether that firmware is in the MoBo BIOS
(internal HD) or the external enclosure's USB to IDE interface, the result
is the same.

As an example, my old enclosure works fine with the 40 GB HD I originally
put in it, but will not fully format my new 300 GB HD. The new HD works
fine in a new enclosure.


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