On 8/1/06, McGraw, Robert P. <rmcgraw AT purdue DOT edu> wrote:

....

I am running Solaris 10 on the amanda server. I ran the first part of
tapetype with /dev/rmt/1n(c) where "n" is no rewind and "c" is compression.
I did not specify the "c" or "u" for compression, yet I got "WARNING: Tape
drive has hardware compression enabled".

zorn->[46] > ./amtapetype -o -c -e 200g -f /dev/rmt/1n -t Ultrium2

Writing 2048 Mbyte   compresseable data:  37 sec
Writing 2048 Mbyte uncompresseable data:  76 sec
WARNING: Tape drive has hardware compression enabled
Estimated time to write 2 * 204800 Mbyte: 15200 sec = 4 h 13 min

zorn->[51] > ./amtapetype -o -c -e 200g -f /dev/rmt/1cn -t Ultrium2

Writing 2048 Mbyte   compresseable data:  37 sec
Writing 2048 Mbyte uncompresseable data:  76 sec
WARNING: Tape drive has hardware compression enabled
Estimated time to write 2 * 204800 Mbyte: 15200 sec = 4 h 13 min


Any ideas on how to turn off compression?

Please see http://wiki.zmanda.com/index.php/Hardware_compression

Paddy

Thanks

Robert

_____________________________________________________________________
Robert P. McGraw, Jr.
Manager, Computer System                 EMAIL: rmcgraw AT purdue DOT edu
Purdue University                         ROOM: MATH-807
Department of Mathematics                PHONE: (765) 494-6055
150 N. University Street                   FAX: (419) 821-0540
West Lafayette, IN 47907-2067

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