> 7 giga with compression. AIX001 filled at 51%. This operation taken
> 4 Hours and half. My two's driver was busy for a long time. Is normal
> that this copy of tape to tape take a very long time ???

It's not an unreasonable amount of time for 8mm devices. 8mm
tapes are slow, and the compression isn't helping your device
transfer speed much at all. Max transfer rate for most 8mm
devices is at best 300K/sec, 450K/sec if you're really lucky and
your hardware can keep the drive streaming constantly. Since
you're reading the tape, decompressing the data, recompressing it
and writing it back out to another tape (not counting tape
positioning time) - both operations on fairly slow devices - it's
unlikely that you'll get spectacular performance from that
configuration.

> If the time of life of a 8 mm cartridge isn't very long, i suppose that
> i should take this operation many times ... Is it true. Are there a
> mechanism in adsm to secure data on a 8 mm media tape. ???????

Your best bets are top quality tapes and a lot of prayer. You may
want to consider 3490E drives or a 3590, if you want fast tape
operations. 8mm tapes are trendy, but not particularly reliable
or speedy. You'll also want to be very careful about
environmentally controlled storage areas for 8mm tapes; they're a
lot less tolerant of substandard storage conditions than the
3490s.