Amanda getting slower every version?

[nichot20]

OK, So I think I have answered my own query.
MY original build was on 2.5.2p1-1, and my build had a fixed blocksize such that changing that parameter made no difference to amtapetype. However I now find that on my build of 2.6.1.1p1 this is no longer true and after trying various figures have come up with the following amtapetype results:-

#Z400 based system
define tapetype quantum-lto4-256 {
comment "Created by amtapetype; compression enabled"
length 815598080 kbytes
filemark 5688 kbytes
speed 75434 kps
blocksize 256 kbytes
}
#IBM x3550 system
define tapetype quantum-lto4-256 {
comment "Created by amtapetype; compression enabled"
length 815319040 kbytes
filemark 4543 kbytes
speed 77597 kps
blocksize 256 kbytes
}
Running an actual dump on the Z400 system showed TAPER STATS as going up from ~36MB/s to ~89MB/s
Job Done