Turgut Kalfaoglu wrote:

Now, when I re-run the amdump configname , amanda complains that the tape
is in use. I am not sure how to add new tapes to a tapeless operation; I
just want the incremental backups to go to different subdirectories of the
disks on the server.

The manpage talks about it. See "file" in the section OUTPUT DRIVERS
typing man amanda.

I have a server configured like this. So I put the backups in
/dumps/backup. There I have the directories: Daily-11, Daily-12 ...

And there is a link to the current directory:

# ls -l
total 44
drwxr-xr-x    3 amanda   root         4096 oct 27 18:30 Daily-11
drwxr-xr-x    2 amanda   root         4096 oct 27 17:54 Daily-12
drwxr-xr-x    2 amanda   root         4096 oct 27 17:54 Daily-13
drwxr-xr-x    2 amanda   root         4096 oct 27 17:54 Daily-14
drwxr-xr-x    2 amanda   root         4096 oct 27 17:54 Daily-15
drwxr-xr-x    2 amanda   root         4096 oct 27 17:54 Daily-21
drwxr-xr-x    2 amanda   root         4096 oct 27 17:54 Daily-22
drwxr-xr-x    2 amanda   root         4096 oct 27 17:58 Daily-23
drwxr-xr-x    2 amanda   root         4096 oct 27 18:08 Daily-24
drwxr-xr-x    2 amanda   root         4096 oct 27 18:15 Daily-25
lrwxrwxrwx    1 amanda   disk            8 oct 27 18:28 data -> Daily-11

I have made a script that rotates to the next dir changing
the link.