Enabling Software Compression on VTL drives causes backup failure (4047188)

Enabling Software Compression on VTL drives causes backup failure

A backup to VTL fails with the following error messages:

Error NVSERVER C:\NewLibrary\drives\1: had media error
Error Fatal error: Failed to write segment

Log Context:

DEVDISK :2240 95 0 626 Close Write Segment
DISKFILE:2240 121 0 626 Attempted to write past end of media
MEDWRITE:2240 276 0 626 Failed to close write segment

This phenomenon sometimes occurs if all of the following conditions are met. However, there are cases without occurrence of this phenomenon because it depends on the data backed up

Conditions
- Software Compression on VTL drive configuration enabled
- Backup data spans multiple tapes

Note: This phenomenon occurs regardless of “Media Block Size” configured in the VTL drive configuration