Tape restore fails with “File not found”
Tape restores as well as disk and NAS archive restores rely on a feature called ‘Quick Seek” to guess where data may be in a device. On some tape systems, this can be inaccurate especially when tape hardware compression is enabled.
Edit the file
/usr/bp/bpinit/master.ini , locate the section
[sctape] and the line
QuickSeek. Set the value to “No” and retry your restore.