its on Linux - and there is the scsi command to disable hardware compression
but thats before each write isn't it?

NTW i'm running amtapetype again with the estimate option.

so far we are at...

$ amtapetype -e 100gig -f /dev/nst0
Writing 1024 Mbyte   compresseable data:  47 sec
Writing 1024 Mbyte uncompresseable data:  77 sec
WARNING: Tape drive has hardware compression enabled
Estimated time to write 2 * 102400 Mbyte: 3112 sec = 0 h 51 min
wrote 1966080 32Kb blocks in 60 files

> Tom Brown wrote:
> > do you know what settings on the drive can effect this? Its preyy much
as it
> > was shipped. I'm investigating how to disable hardware compression but
so
> > far the vendor has not supplied the required information.
>
> That depends on the OS.  Solaris?  Linux?  VMS? Dos?
> (There are usually also dip-switches but I would expect those to be ok
> to do everything you want.)
>
> -- 
> 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
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>
>
>