On Sat, 13 Jan 2001 at 1:48pm, Adolfo Pachón wrote
> "[...] When using hardware compression, change the length value based on the
> estimated compression rate. This typically means multiplying by something
> between 1.5 and 2.0. [...]"
>
> I ask,
>
> A) Can I multiply the length 3930 (4GB) by 2 (8GB)?
> B) It will work fine?
>
And I ask, why are you even considering this? As John pointed out,
hardware compression will almost never get you 2:1. More to the
point, however, the HP colorado drives do *not* do hardware compression.
See:
http://www.hp.com/tape/colorado/5-8gbdatasheet.html
To quote that page:
"4.0 GB native, up to 8.0 GB with software data compression"
So, give amanda the tape definition produced by tapetype, and, if you want
compression, use software compression (which allows amanda to plan more
accurately anyway).
--
Joshua Baker-LePain
Department of Biomedical Engineering
Duke University
