PP Presentation
- 2 tape drives with very different characteristics
robotic bandwidth =
average filesize / ( ( robot mount + media load + media search +
data transfer time + media rewind + media unload + robot dismount ) / # of drives )
- T1: single reel cartridge (slow load, fast transfer) sample filesizes:
- T2: 2-reel cassette (fast load, slow transfer) 10 and 1000 MB
T1: 10 / ( ( 10 + 15 + 30 + 1.1 + 20 + 11 + 10 ) / 2 ) = 0,20 MB/s
T2: 10 / ( ( 10 + 2 + 7 + 4.6 + 5 + 2 + 10 ) / 2 ) = 0,49 MB/s <== better
T1: 1000 / ( ( 10 + 15 + 30 + 112 + 20 + 11 + 10 ) / 2 ) = 9,62 MB/s <== better
T2: 1000 / ( ( 10 + 2 + 7 + 456 + 5 + 2 + 10 ) / 2 ) = 3,98 MB/s
More Samples