On Tue, May 7, 2013 at 9:45 AM, John Drescher <drescherjm AT gmail DOT com> 
wrote:
>
> The 6.25TB is only an estimate. If you have non compressible data you
> will get close to 2.5 TB of space on your tape. If you have all text
> files you may fit 15 TB on a single tape..

Great, thanks for that!   That's what I thought but I've never used HW
compression.

So since I don't have an LTO 6 yet, is there a good way to get an
estimate of the compressability of my data?

If I just tar cz my data will that give me a close ballpark?  Or
better bzip?   Or something else?

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