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# Hard Disk Access Disappears with Ultrastor 34F Local Bus

Article ID: 117139

Article Last Modified on 12/6/2003

APPLIES TO

- Microsoft MS-DOS 5.0 Standard Edition
- Microsoft MS-DOS 5.0a
- Microsoft MS-DOS 6.0 Standard Edition
- Microsoft MS-DOS 6.2 Standard Edition
- Microsoft MS-DOS 6.21 Standard Edition

This article was previously published under Q117139

## SYMPTOMS

After you add the line DOS=UMB to the CONFIG.SYS file, only one MS-DOS command can be executed before hard disk access is lost on a SCSI hard disk drive controlled by a Ultrastor 34F local bus SCSI controller.

## CAUSE

This behavior occurs if DOS=UMB appears in the CONFIG.SYS file before the Ultrastor SCSI device driver, USPI14.SYS.

## RESOLUTION

To correct this problem, edit the CONFIG.SYS file and add USPI14.SYS before the line DOS=UMB.
If the USPI14.SYS file is not currently available, remark out the DOS=UMB line in the CONFIG.SYS until the file can be loaded.

Additional query words: 5.00 5.00a 6.00 6.20

Keywords: KB117139