Ditto 2 = 120 mb???????

[Carlos Martin]

        Hi

        I cant write more 120 mb more or less in a 2GB ditto cartridge 

        These are the steps I follow:

insmod ftape
insmod zftape
insmod ftape-internal
mt -f /dev/nqft0 rewind
mt -f /dev/nqft0 erase
tar -cpPvz --exclude proc.txt -f /dev/nqft0 /

I have triyed this devices

crw-------   1 root     root      27,   4 Sep 28 20:53 /dev/nqft0
crw-rw----   1 root     disk      27,  36 Apr 17 21:53 /dev/nrawqft0
crw-------   1 root     root      27,  20 Jul  7 23:30 /dev/nzqft0
crw-------   1 root     root      27,   0 Sep 28 20:53 /dev/qft0
crw-rw----   1 root     disk      27,  32 Apr 17 21:53 /dev/rawqft0
crw-------   1 root     root      27,  16 Jul  7 23:30 /dev/zqft0

tar (grandchild): Cannot open archive /dev/zqft0: Read only file system
tar (grandchild): Cannot open archive /dev/nzqft0: Read only file system

        What am I doing wrong? what are all this devices for?

        Thanks

        Carlos