[Nottingham] Re: Tape Backup failure

Martin martin at ml1.co.uk
Fri Jun 11 13:26:20 BST 2004


David Wolfson wrote:
[...]
> So I've solved the problem, but am still confused. If the backup
> creates a tarball of ~10Gb, and the tapes say 24Gb on the side, why
> does it fill up the tape?  How can I find the real capacity of the
> tape?
[...]

It's the old marketing numbers game...

Are you sure those "20GByte" tapes are not actually "10GBytes" with the 
assumption of 50% compression and zero blocking overheads?

The "GByte" is also likely 10^9 rather than a true binary GByte of 1024^3!

Good luck,
Martin

-- 
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Martin Lomas
martin at ml1.co.uk
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