fbackup :unable to read volume header

[Jennifer Arey_1]

When I run my sam backup, I get a return code of 4 and when I look in
/var/sam/log/br_log it tells me

fbackup(3205) : WARNING: unable to read a volume header

What would cause this Warning message when it appears that everything is
getting backed up. This was only happening once in a while but I have not had
a backup with a return code of 0 for a week and a half.

[Atif Malik_2]

This message tells you that this is the first time that the tape has been
written to by fbackup.

fbackup(1M) writes the volume header on the tape the first time it writes to it

-Atif

[Sachin Patel_2]

I agree. If you want to read the header you can by:
/sbin/frecover -f /dev/rmt/???? -v -

Sachin