AccuLogic IDE Controller Incompatible with ScanDisk (108016)
The information in this article applies to:
• Microsoft MS-DOS operating system 6.2
This article was previously published under Q108016
AccuLogic has confirmed that running MS-DOS 6.2 ScanDisk on a hard disk
drive controlled by the AccuLogic Side 3 Plus IDE controller may result in
data loss if you allow ScanDisk to perform a surface scan.
This problem occurs when the AccuLogic Side 3 Plus IDE controller is
configured for an IDE drive type not directly supported by the ROM BIOS of
the system and the AccuLogic ROM BIOS is enabled.
NOTE: AccuLogic has confirmed that this problem occurs due to a limitation
of the AccuLogic ROM BIOS. The potential for data loss on these controller
cards is not limited to ScanDisk--it exists for other surface-scan programs
that make interrupt 25h and interrupt 26h calls (absolute sector reads and
writes). The AccuLogic ROM BIOS does not properly resolve these interrupt
If your computers BIOS supports an IDE drive type that is similar to your
IDE hard drive's actual or logical characteristics, it may be possible to
disable the AccuLogic ROM BIOS and use your computer's ROM BIOS to support
the drive. This would allow all ScanDisk functions to run successfully.
If your IDE hard drive cannot be supported by your computer's ROM BIOS, you
should not run the ScanDisk surface scan on that drive. All other ScanDisk
features (media descriptor, file allocation tables, directory structure,
and file system) should work properly.
If you cannot successfully run the surface-scan portion of ScanDisk on your
IDE drive, you should not install MS-DOS DoubleSpace. Also, you should not
use Microsoft Defragmenter (Defrag) since it uses interrupt calls 25H and
26H to move the information stored in one cluster to another.
For information on what drive types are supported by the ROM BIOS of your
computer, contact your hardware vendor. For information on configuring the
AccuLogic controller, call AccuLogic Technical Support at (714) 454-2441.
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