This article was previously published under Q195898
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After you apply the updated Atapi.sys driver on a computer with a hard disk drive larger than 8 gigabytes (GB) that is connected to aPromise Technologies Ultra 33 PCI bus-mastering controller, the drive maystill be reported as only 8 GB by Disk Administrator.
On computers configured to use a Promise Technologies Ultra 33 PCI bus-mastering controller, the following conditions must be true:
Version 1.3.5 or later of the Promise Technologies driver must be used.
The updated Atapi.sys hotfix must be installed.
The IDE channel must be disabled in the computer's BIOS so that the LBA EIDE feature in the BIOS on the Promise card can control access to the drive.
To see a hard disk drive that is larger than 8 GB and isconnected to a Promise Technologies Ultra DMA PCI controller, thefollowing conditions must be true:
The IDE channel to which the drive would otherwise be attached on the motherboard must be disabled in the computer's BIOS.
Use the latest driver for the Promise Technologies Ultra DMA bus- mastering card. For the entire drive to be accessible under Windows NT 4.0, version 1.3.5 or later of this driver must be installed.
The updated Atapi.sys driver must be installed as per the following article in the Microsoft Knowledge Base:
197667 Installing Windows NT Server on a Large IDE Hard Disk
To resolve this problem, obtain the latest service pack for Windows NT 4.0 or Windows NT Server 4.0, Terminal Server Edition. For additional information, click the following article number to view the article in theMicrosoft Knowledge Base:
152734 How to Obtain the Latest Windows NT 4.0 Service Pack
Microsoft has confirmed that this is a problem in Windows NT 4.0 and Windows NT Server 4.0, Terminal Server Edition. This problem was first corrected in Windows NT 4.0 Service Pack 4.0 and Windows NT Server 4.0, Terminal Server Edition Service Pack 4.
The updated Atapi.sys file is included in Windows NT 4.0 Service Pack 4.