On Wed, Mar 20, 2002 at 10:16:43AM +0000, Liam Bedford wrote:
> Well, 20 megs uncompressed maybe, if you're talking about 25 years ago.
In the days of 80 character terminals, then ?
> AIT-II is 50G native, AIT-III is 100G native...
and Ultrium is even more, I think - google if you're interested.
> (interestingly, the compression ratio's they quote seem to be growing...
> they used to quote 2:1, now they're doing 2.6:1).
This REALLY bugs me - I remember doing an informal survey on sun-managers
years ago and real world compression ratios to Exabytes or DAT were about
1.4-1.6:1 and I seriously doubt that there's been some new magic streaming
compression algorithm found.
> Though you are looking at a substantial investment for both of those tape
> drives, with a < 10% duty cycle IIRC. The tapes run between 40 and 100 EUR,
> depending on capacity.
Assuming 100 EUR for 100G, that's still somewhat cheaper than IDE - best I
can see with a quick look is 111.50 EUR fro a 60GB Maxtor drive.
> DDS4 is 24G compressed isn't it? I know with my usage, that would cover the
No - DDS4 is 20 GB native - DDS3 is 12 GB native. They claim 2:1 compression
- I claim immortality - both claims equally spurious.
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