Memorex LOCK - VERSION 2-24 Especificaciones Pagina 416

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Differences Between TSIDONL Onload and TSIDONL Restore Offload Syste
13-32 User Reference
Differences Between TSIDONL Onload and TSIDONL Restore
Suppose we have the following versions of a dataset called DATASET.A:
Version
number
Absolute generation
number (AGN)
146
245
344
443
542
641
Absolute generation numbers (AGN) run in inverse sequence to the version numbers within a
dataset. At one time (when it was first created), version 2, AGN=45 was version 1. The 45
means that this was the 45th time this dataset was created. The next time a version was
created, it was the 46th, hence the AGN=46. The newly created version became version 1, the
most current version.
Suppose versions 3 through 6 were offloaded to tape. Now DATASET.A looks as follows:
Version
number
Absolute
generation number
(AGN)
146
245
Version information still exists in DATASET.A for versions 3 through 6, but now those
versions display as tape datasets instead of disk. Versions 3 through 6 are still available for
scratching (assuming all retention criteria has been met) even though they have been
offloaded.
Suppose versions 3 through 6 are not scratched and two new versions are created. Now
DATASET.A looks as follows:
Version
number
Absolute
generation number
(AGN)
148
247
346
445
Description
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