Memorex LOCK - VERSION 2-24 Informações Técnicas descarregar pdf (Página 37)

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Versioning Datasets

User Reference

Use Pursuant to Company Instructions

1-19

Extent Number

and Address

BIM-EPIC records the extent addresses for each disk dataset. This

information includes:

 extent sequence (1 for primary, 2 for the first secondary, and so

on)

 beginning relative track or block number

 size of the initial allocation

 amount of allocation used

The amount of allocation used is smaller than the initial allocation if the

dataset has been truncated.

BIM-EPIC may allocate an additional extent if the extent being processed

is nearly full when the dataset is closed. This extra extent is called an EOF

extent.

Record Format,

Length, Block

Count, Block

Size

The actual record format, record length, block count, and block size are

recorded for each version. This information is recorded when the dataset

is created by a program that uses logical IOCS. The information can be

zeros if the dataset is created by a program that uses physical IOCS.

Creation

Date/Time

BIM-EPIC records the date and time the version was written.

Job/Device

Address

BIM-EPIC records the name of the job that created the version, the

partition in which it was created, and the address (cuu) of the device on

which it was created.

Last Access:

Job and Date

BIM-EPIC records the date the version was accessed and the name of the

job that requested access, each time the version is opened.

Expiration Date BIM-EPIC calculates an expiration date for each version based on

retention days and DLA retention. A version remains active past its

expiration date if it is still needed to satisfy cycles retention.

Tape Use and

Error Count

The tape use count indicates the number of times the tape has been

accessed. The tape error count indicates the number of read/write errors

encountered.

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