Rewinding tapeless "tapes": why? error?

[bao]

Hi everyone,

It makes sense that before recovering from a real tape, the tape has to 
be rewound.
But for backup to disk (tapeless), the "tape" is just a file on hard 
disk, why does amanda
require it to be rewound??

Recovery works, but rewinding the "tapes" gives unpleasant error 
messages as follows:
DailySet4/data/00001.server._home.1 rewind failed: Inappropriate ioctl 
for device

After that error message, the recovery goes on as normal. Without 
rewinding "tape", it will
complain with EOF stuff.

Has anyone ever found out why??

Thanks,