DLT Tools is an application that will allow you to perform diagnostics
and maintenance functions to the 20/40GB, 35/70GB, and 40/80GB IBM DLT
technology tape drives.

The latest firmware updates for all DLT tape drives are provided on the
IBM Personal System Group support web pages.  These files come in an 
image format(xxx.img) that when exercised by DLT Tools will update the
 tape drive to the current level.

To perform an update:
1. Run the ASPI32.EXE setup program to install the ASPI support layer.
2. Ensure that all media is removed from the tape drive prior to an 
firmware update.
3. Stop any tape services that maybe starting automatically.  
4. Execute the DLT Tools application.
5. Within the application the first screen will list all host SCSI 
controllers seen by the operating system.  Select the appropriate SCSI 
controller where the DLT tape drive can be found.
6. The second screen will identify devices and associated SCSI ID's 
that are found attached to the selected host SCSI adapter.  Insert the 
SCSI ID of the appropriate DLT tape backup device.
7. Select File > then > Select a FUP file.  The application will search
for the location of the appropriate image file(xxx.img) to be used in 
the upgrade process.  
8. After directing the wizard to the appropriate image file the update process is fully automated.