On 2006-08-02 15:08, McGraw, Robert P. wrote:
./sbin/amtapetype -o -t LTO2HWC -e 200g -f /dev/rmt/1nWriting 2048 Mbyte compresseable data: 38 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 wrote 6422528 32Kb blocks in 98 files in 7358 seconds (short write) wrote 6455296 32Kb blocks in 197 files in 7737 seconds (short write) define tapetype LTO2HWC { comment "just produced by tapetype prog (hardware compression on)" length 201216 mbytes filemark 0 kbytes speed 27315 kps } I am in the process of trying to find out how to turn off hardware compressing for the Solaris 10 OS.
I hope you did understand that turning off hardware compression for LTO tape drives is not so important as for most other tape drives. So why doing the effort, while you can use both hard- and software compression, and not suffer from the bad side effect (expanding data and loosing capacity) that most other tape drives have. As Joshua, I have hardware compression turned ON for my LTO2 drive, so that a few DLE's on slow hosts, where I cannot afford software compression, still benefit from the hardware compression and my tapes can hold more than 100% data now and then. -- Paul Bijnens, xplanation Technology Services Tel +32 16 397.511 Technologielaan 21 bus 2, B-3001 Leuven, BELGIUM Fax +32 16 397.512 http://www.xplanation.com/ email: [EMAIL PROTECTED] *********************************************************************** * 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, * * init 0, kill -9 1, Alt-F4, Ctrl-Alt-Del, AltGr-NumLock, Stop-A, ... * * ... "Are you sure?" ... YES ... Phew ... I'm out * ***********************************************************************
