I had this problem recently, and it turned out to be a bum network
interface. (Although your dump rate seems OK.)
Try doing an FTP of a large file between two of the servers that
failed; if a large (say, 10 MB) file takes more than a second or two
to transfer, you should consider if your network
Our backups are an estimated 28GB and are kicked off at 10pm
but they are taking almost 24 hours to complete since we
upgraded to amanda 2.4.2p2. Before with amanda 2.4.1p1 they
finished about 2.00pm. Also the idea of kicking them off about
10pm is they will run when there is very few users on