Alexey I. Froloff wrote:
* Alexey I. Froloff <raorn@> [040707 14:10]:
P.S. Right now I figured how to turn HW compression off (with mt
utility) and started amtapetype again...
Thanks to all for your help. amtapetype finished successfully.
$ /usr/sbin/amtapetype -e 100g -f /dev/nst0 -t "HP-C7971A"
Writing 1024 Mbyte compresseable data: 25 sec
Writing 1024 Mbyte uncompresseable data: 72 sec
WARNING: Tape drive has hardware compression enabled
Estimated time to write 2 * 102400 Mbyte: 14400 sec = 4 h 0 min
wrote 3244032 32Kb blocks in 99 files in 7310 seconds (short write)
wrote 3244032 32Kb blocks in 198 files in 7666 seconds (short write)
define tapetype HP-C7971A {
comment "just produced by tapetype prog (hardware compression on)"
length 101376 mbytes
filemark 0 kbytes
speed 13871 kps
}
Noticed the speed increase when specifying '-e 100g' !
And notice that even with hardware compression on, these drives can put
100 Gbyte on tape, thanks to the intelligent hwcompr algorithm that
somehow avoids compressing random data.
I wish I owned one of those drives.
--
Paul Bijnens, Xplanation Tel +32 16 397.511
Technologielaan 21 bus 2, B-3001 Leuven, BELGIUM Fax +32 16 397.512
http://www.xplanation.com/ email: Paul.Bijnens AT xplanation DOT com
***********************************************************************
* I think I've got the hang of it now: exit, ^D, ^C, ^\, ^Z, ^Q, F6, *
* quit, ZZ, :q, :q!, M-Z, ^X^C, logoff, logout, close, bye, /bye, *
* stop, end, F3, ~., ^]c, +++ ATH, disconnect, halt, abort, hangup, *
* PF4, F20, ^X^X, :D::D, KJOB, F14-f-e, F8-e, kill -1 $$, shutdown, *
* kill -9 1, Alt-F4, Ctrl-Alt-Del, AltGr-NumLock, Stop-A, ... *
* ... "Are you sure?" ... YES ... Phew ... I'm out *
***********************************************************************
|
