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Figure 13-10 shows a typical tape management with enhanced control of the
actual state of the tapes.
Figure 13-10 IBM Tivoli Storage Manager and tape life cycle
Providing that all of your primary storage pools are being backed up, then under
normal conditions, the off-site tapes contain exactly the same versions of valid
data that you have on-site. This means that on-site and off-site volumes mirror
the same data, correct to the time of the last storage pool backup operation. This
does not mean that you have the same amount of tapes, but simply shows that
what you have "inside" is the same that you have "outside" (regardless of the
number of tapes).
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IBM Tivoli Storage Manager Implementation Guide
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