Memorex LOCK - VERSION 2-24 Especificaciones Pagina 31

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Version Information Introduction
Chapter 1. Introduction 1-17
Scratch (S) denotes a tape version in scratch status. The tape can be overwritten at any time.
Disk version records are deleted, not marked as scratch.
Lock (L) denotes a version in locked status. It cannot be accessed as input until it is unlocked
or released using Online Manager or the TSIDMNT utility.
Subdataset (N) denotes a dataset in a multi-dataset group with file sequence number 2 or
greater.
Work (W) indicates a non-generation dataset.
Unlabeled (U) indicates that the version was created on an unlabeled tape.
MCAT (M) indicates that the version has been MCATALOGed. It can be an MCAT master
or alias version.
Offload status indicates that a disk version has been moved to tape with BIM-EPIC’s offload
system. The offload system is described in detail in Chapter 13.
The volume serial number field indicates the volume serial number of the tape or disk volume
on which the version is written. For multi-volume datasets, there is one volume serial number
recorded for each volume.
The reel number indicates the tape volume sequence number for multi-volume datasets.
The file sequence number field indicates the position of the dataset in a multi-dataset group.
BIM-EPIC records the extent addresses used for each disk dataset. For each extent it records:
the extent sequence (1 for primary, 2 for the first secondary, and so on)
the beginning relative track or block number
the size of the initial allocation
the amount of allocation actually used
The amount of allocation actually used is smaller than the initial allocation if the dataset has
been truncated.
BIM-EPIC can allocate an extra extent (called an EOF extent) if the extent being processed is
nearly full when the dataset is closed. See 1-43 in this manual.
The version’s actual record format, record length, block count and block size are recorded.
This information is recorded when the dataset is created by a program that uses logical IOCS;
it can be zeros if the dataset is created by a program that uses physical IOCS.
Volume Serial
Number
Reel Number
File Sequence
Number
Extent Number and
Address
Record Format,
Length, Block
Count, Block Size
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