I'm using AFTD's (disk devices) for all backup jobs, but when the backup starts, Networker immediately shows us with this message "Waiting for (x) writable volume(s) to backup pool "xxxxx" tape(s) or disk(s) on backup server".

The drives are mounted in Linux and not full and also writing while networker is requesting for more tape(s) or disk(s). I also increased the sessions in the devices, but still the same issue.

Is this normal or something is wrong?

Backup server is Networker v7.6 on RedHat Linux 5

thanks in advance for any help, suggestions and or solutions.