---- From WDC knowledge base.
The full capacity of EIDE drives larger than 137GB (128GB binary) is
not recognized in Windows 2000/XP.
48-bit LBA support is necessary for drives larger than 137GB (128GB
binary). The following conditions are necessary for the correct
functioning of 48-bit LBA support in Windows 2000/XP:
Windows XP Service Pack 1 (SP1) must be installed for Windows XP
versions prior to August 2002. For information about SP1, see
Microsoft Article 322389.
The system must have a 48-bit LBA-compatible Basic Input/Output System
(BIOS) installed. This includes EIDE controller card BIOSs.
You must enable the support in the Windows registry.
The Microsoft Knowledge Base articles listed below provide important
information about 48-bit LBA support for drives larger than 137GB in
Windows. For full details, carefully review the relevant article.
48-bit LBA Support for ATAPI Disk Drives in Windows 2000.
How to Enable 48-bit Logical Block Addressing Support for ATAPI Disk
Drives in Windows XP.
Note: The above articles reference making necessary registry changes.
It is strongly advised that you contact Microsoft directly for
------------- End of quote
On Thu, 29 Apr 2004 20:03:05 +1000, Paul Taylor
>R Patton wrote:
>> The 8KHA+ has an ATA100 controller. The ATA100 controller can only
>> address or use 137GB on any single drive.
>Heh, I posted a reply along these lines to the group some time ago,
>and as I discovered was also crossposted to one of the harddisks
>groups. While it is a common belief (backed up by many websites),
>it is *guaranteed* to start a serious flame war.
>As they will tell you (quite rudely...) the issue isn't the speed
>of the controller, but whether or not it supports LBA-48.
>ATA133 was the first to implement LBA-48, which is why people think
>you need ATA133 to support >137GB drives. Since then, BIOS updates
>have added LBA-48 support to some ATA100 controllers as well. (In
>my opinion that was a mistake - you can't readily tell if a given
>ATA100 controller will or won't work.)
>The good news is the latest 8KHA+ BIOS supports >137GB drives;
>this was introduced with the 25 Mar 02 update. >> Stay informed about: 8KHA+ Hard Drive Limit?