QIC Tape with Multiple Backups Sets, Only First Set Displayed

ID: Q124803

The information in this article applies to:

Microsoft Windows NT Workstation version 3.5
Microsoft Windows NT Server version 3.5

SYMPTOMS

Windows NT Backup displays only the first backup set on a QIC tape with multiple backup sets. Once this problem has occurred, it is not possible to restore data from the missing sets.

QIC-40 or QIC-80 tape drives that create multiple backup sets occasionally have difficulty cataloging the tapes or detecting backup sets beyond the first one present on the tape. The Arcada Backup Exec package does not exhibit this problem because it stores catalog information on the disk.

STATUS

Microsoft has confirmed this to be a problem in Windows NT version 3.5. We are researching this problem and will post new information here in the Microsoft Knowledge Base as it becomes available.

There is a utilty called LDDTU for dumping data from tape. This utility is not for distribution and is unsupported. It is located on:

\\CNSSUP1\NTTOOLS!TAPEDUMP\LDDTU.EXE

An example of how to dump data from the tape using the utility:

lddtu -q -f tapedump.raw -s 5 -b 0

The -S indicates the saved set to dump and increments by two each time. (Therefore, the first set is 1, the second is 3, the third is 5, etc.)

Additional query words: prodnt 3.50

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