Quantum DLTtape DLT 2000, Руководство пользователя

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QUANTUM DLTtape HANDBOOK 12.3
What Does Media Cost?
Media prices fluctuate. In general, however, smaller-capacity media
tend to have a lower cost per cartridge, while larger capacity media
(like DLTtape cartridges) tend to offer the lowest cost per gigabyte.
(See Figure 12-1.) In these terms, DLTtape media is among the
least expensive tape media on the market.
Overall media cost may also be determined by application and the
specific backup routines used. How many tapes will you need? In a
“typical” backup application, there would be incremental backups
daily, and a weekly full backup. If you can put an incremental backup
on a single DLTtape cartridge, and the full backup takes five car-
tridges, you’ll need ten cartridges for a complete one-week cycle of
backups. In that kind of situation, many organizations elect to keep
Native Capacity (GB)
1.0
20 40 60 80 100 120
2.0
3.0
4.0
$6.0
5.0
DLT 4000
DLT 8000
DLT 7000
SDLT 220
DLT1
Media Costs ($/GB)
Figure 12-1 Cost per Gigabyte of Storage
is a function of
media capacity. High-capacity DLTtape IV and Super DLTtape I
cartridges deliver the lowest dollars-per-gigabyte cost.