Hard Disk Access Disappears with Ultrastor 34F Local Bus (117139)


The information in this article applies to:

  • Microsoft MS-DOS operating system 5.0
  • Microsoft MS-DOS operating system 5.0a
  • Microsoft MS-DOS operating system 6.0
  • Microsoft MS-DOS operating system 6.2
  • Microsoft MS-DOS operating system 6.21
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.
Modification Type:MajorLast Reviewed:12/6/2003
Keywords:KB117139
©2003 Microsoft Corporation. All rights reserved.