"Christoph Gartmann" <gartmann at nonsense.immunbio.mpg.de> wrote in message news:hj951n$fsq$1 at news.belwue.de... > But in fact it required three tapes. Was this because I specified three labels > (just in case)? Or is the native capacity of a DLT600 smaller than 300 GB? With the implied "/group=10", it's +10% for redundancy groups for a start.