On Fri, Feb 28, 2003 at 09:18:21AM -0600, Damon LaCaille wrote:
> All:
> 
> Thanks to Jay Lessert, I was able to create a new tape type on a Solaris 9
> Sun E450 with an HP JetStore HP-C1533 DDS-2 tape drive.  Here is the
> configuration output for it using the /dev/rmt/0n tape device
> 
> define tapetype HP-C1533 {
>     comment "just produced by tapetype program"
>     length 3275 mbytes
>     filemark 0 kbytes
>     speed 430 kps
> }

I'm 98% certain hardware compression was on.  It should not have been.
With no HW compression expect numbers much closer to 4GB.  Tapetype
write "random" data that generally expands upon compression attempts.
Often by as much as the 15% reduction you are seeing in tape length.

-- 
Jon H. LaBadie                  jon AT jgcomp DOT com
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