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Improper Harddrive Recognition


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3 replies to this topic

#1 mikeandrew

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Posted 23 December 2008 - 05:14 PM

I'm hoping someone can lead me to a windows fix or a standalone piece off software that will resolve a seemingly simple problem. I have 2 computers, 1 is a amd athlon 64bit 3800+ with a 200gig maxtor diamond plus and the other one is a intel pentium III 1000mhz with a 250gig maxtor diamond plus. both units are presently running windows xp sp 1-2. The bios set-up in both units detects and sees the hard drives correctly. However, windows only sees 137gig. How can I fix this?
I tried running vista on the athlon 64 bit unit but it didn't see any more of the drive than xp did. :thumbsup:

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#2 garmanma

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Posted 23 December 2008 - 08:30 PM

If the option exists in the BIOS, make sure LBA (large block addressing) is enabled
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#3 dpunisher

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Posted 24 December 2008 - 02:16 AM

Sometimes a BIOS update is needed to enable 48bit LBA as well.

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#4 Platypus

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Posted 24 December 2008 - 07:50 AM

Do you mean Windows only sees a partition that size? In this case, Disk Management will show the remainder of the drive as Unallocated Space. This will occur if the drives have been initially set up using pre-SP1 XP, or any other means of drive partitioning that does not implement 48-bit LBA.

If this is the situation, subsequent updating to, say, SP2, or viewing the drive with Vista, still only sees the limited "drive" (partition) size. The remainder of the drive needs to be partitioned to mount another drive, or expanded out to fill unallocated space, using Vista's own capability, or third-party software under XP.

If this is not the case, Drive Management will show no unallocated space.
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