i setup rsync to transfer data from one volume to the other. This is
kinda slow, got around 200-1000kb/s depending on file size

the build of the file list with 300.000 files took already some hours,
total files are 166GB

how do you do it?

or are there any parameters this can speed up?

i am using following:

-a archive
-c checksum
-g group
-p keep permission (doesnt work)
-o keep owner (doesnt work)
-r recursive
-t time
-v verbose

i am not sure but rsync can only copy from server to server?
there are 2 volumes on different san storages which i could mount all
on one server also