Hi again,

this is what I've found using tcopy command to scan the tape:

mt -t /dev/rmt/6 rew
tcopy /dev/rmt/6n

file 1: record 1: size 3200
file 1: record 2: size 400
file 1: record 3 to 53964: size 8240
file 1: eof after 53964 records: 444650480 bytes
eot
total length: 444650480 bytes

tcopy ...../6n once more

file 1: record 1: size 3200
file 1: record 2: size 400
file 1: record 3 to 500424: size 8240
file1: eof after 500424 records: 4123480880 bytes
eot
total length: 4123480880 bytes

tcopy..../6n once more
file1 : eof after 0 records: 0 bytes
eot
total length: 0 bytes

Thanks in advance for your help