PB with HP DAT 72 data cartridge

Hello,

I use unixware 7.14 and I need to backup with tar command on HP DAT 72.
When executing tar command the next message is diplayed: tar: ERROR: Tape write error: I/O error.
When replacing the DAT 72 data cartridge with DAT 40 data cartdrige no message displayed and backup is done.

Thank you for your help.