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This is great: Due to a severe increase in demand, we are forced to state some kind of policy on private archival backup tapes. Effective immediately,
by lemevi 11y ago
This is great:
Due to a severe increase in demand, we are forced to state some
kind of policy on private archival backup tapes. Effective immediately,
anyone can have a backup done on a BYOT (bring your own tape) basis.
All of the above applies to floppies, as well as tape; floppies are
a little more convenient to store, but don't hold as much. Rough figures
follow:
Tape (2400 ft, 8KB block size) = 40MB storage, or 80,000 disk blocks
(figure 75K blocks after backup adds its own overhead)
Floppies (single density, our default) = .25MB, or 500 disk blocks.
Floppies (double density, YOU MUST SPECIFY) = .5MB, or 1,000 disk
blocks. If you want double density, all of the floppies to be written on
must be pre-initialized before the backup starts. Therefore, you need to
KNOW beforehand just how many floppies are to be used.
It makes me think about our company's 1MB web page download, as it would require 60ft of Atari tape storage. XD
[0] http://www.jmargolin.com/vmail/Vax83.txt http://www.jmargolin.com/vmail/Vax83.txt
- jacquesm 11y ago> as it would require 60ft of Atari tape storage. More likely they were DEC VAX tapes. https://en.wikipedia.org/wiki/File:9-track-drive.jpg https://en.wikipedia.org/wiki/File:9-track-drive.jpg At a guess running at 1600 bpi for 40M at 2400 ft. (1600 x 12 x 2400 = 46M bytes and change, reserve some room for headers)