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Article ID: 239119 - Last Review: February 12, 2007 - Revision: 1.4
BUG: FDISK Reports Incorrect Disk Capacity for Certain PCMCIA / PCCARD ATA Drives
This article was previously published under Q239119
FDISK, when run from an MS-DOS box after Windows has been started, reports the wrong disk size for PCCARD-based ATA drives that contain a storage capacity greater than 1023 cylinders. This issue generally applies to disk drives that do not appear in real mode prior to protected-mode Windows (this problem occurs, for example, with drives where the controller has no BIOS extension, so MS-DOS has no way of knowing that they exist).
A bug in the IDE device driver, Esdi_506.pdr, results in FDISK using INT 13 function 8 to obtain disk geometry information. This function truncates the cylinder count to a 10-bit value.
Microsoft has confirmed that this is a bug in the Microsoft products that are listed at the beginning of this article.
APPLIES TO
- Microsoft Windows 95
- Microsoft Windows 98 Standard Edition
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