HP DAT160 tapetype (revised)
2007-08-11 16:44:12
For the record, here's the output of amtapetype for the Hewlett Packard DAT160
USB with hardware compression OFF.
There are no visible jumpers or dip-switches to disable hardware compression
like earlier DAT devices - inside the enclosure the drive itself is a fully
shielded unit.
Compression can be turned off using HP Library and Tape Tools for Linux but the
setting appears to be volatile and although the LTT app runs in a console it
seems a bit overkill for running what seems to be a bunch of compressed perl
scripts. Anyone found a workaround for soft configuration?
Can anyone suggest why the filemark is showing such a large value?
grunt:/usr/sbin # amtapetype -o -e 80g -f /dev/nst0
Writing 512 Mbyte compresseable data: 94 sec
Writing 512 Mbyte uncompresseable data: 82 sec
Estimated time to write 2 * 81920 Mbyte: 26240 sec = 7 h 17 min
wrote 2490330 32Kb blocks in 95 files in 12562 seconds (short write)
wrote 2477223 32Kb blocks in 189 files in 12784 seconds (short write)
define tapetype unknown-tapetype {
comment "just produced by tapetype prog (hardware compression off)"
length 78236 mbytes
filemark 4461 kbytes
speed 6272 kps
}
rb
--
Rory Beaton
Instrumentation Group
NERC Sea Mammal Research Unit
------------------------------------------------------------------
University of St Andrews Webmail: https://webmail.st-andrews.ac.uk
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