Allocate (Two) panel

Panel and field definitions

  Process   Options   Help
 ──────────────────────────────────────────────────────────────────────────────
 Allocate USERID.NEWDS

 Specify a model data set, SMS class names, or leave blank for defaults:
    Like data set . .                                               
    Volume serial . .       
    Device type . . .              generic unit or device address
    Data class  . . .              leave blank for default
    Storage class . .              leave blank for default
    Management class               leave blank for default

 Space Requirements:
    Space unit  . . . TRK          BLKS, TRKS, CYLS, KB, or MB
    Primary units . . 5            quantity of above units
    Secondary units . 5            quantity of above units
    Directory blocks               leave blank for SMS default
    Record format . . FB           if new format: U,F,V, or D, with B,S,A,M
    Record length . . 50     
    Block size  . . .              physical output block size
    Data set type . . LIBRARY      LIBRARY, PDS, BASIC, EXTR, EXTP or LARGE 
    Data set version               for data set name type 
    Max. generations               maximum member generations for PDS/E V2  
    Allocate EAS  . . OPT          blank, NO or OPT 
    Release unused  . NO           enter YES to free unused space, else NO
    Expiration date .              yyyy.ddd, blank for default
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Like data set

The name of an existing data set, to be used as a model for your new data set.

Volume serial

The volser of an existing data set, to be used as a model for your new data set.

Device type

Generic unit (EDT Esoteric Device Type) or device address. This field is mutually exclusive with the Volume serial field.

Data class

The name of a data class defined in your Storage Management System (SMS) installation. Do not enter a value on a system without SMS.

Storage class

The name of a storage class defined in your Storage Management System (SMS) installation. Do not enter a value on a system without SMS.

Management class

The name of a management class defined in your Storage Management System (SMS) installation. Do not enter a value on a system without SMS.

Space unit

Defines the unit of primary and secondary space to be allocated. A unit type is required, when a quantity is specified. Can be one of:

BLK

Block of average size.

KB

Kilobyte (1024 bytes).

MB

Megabyte (1048576 bytes).

TRK

Track of a direct access storage device (DASD).

CYL

Cylinder of a DASD.

Primary units

Amount of DASD space to be used for primary space allocation. The range depends on the space unit specified and the DASD device type.

Secondary units

Amount of DASD space to be used for secondary space allocations. The range depends on the space unit specified and the DASD device type.

Directory blocks

Number of blocks for the directory. You must specify a value when on a system without SMS, or when your SMS installation does not provide a default.

Range: 0-999999

Record format

Enter the record format, optionally followed by one or more attribute characters in the sequence shown.

F

Fixed

V

Variable

D

ASCII variable (tape only)

U

Undefined

Attribute characters:

B

Blocked

S

Spanned, V and D format only

A

with ANSI control characters

M

with machine code control characters.

If omitted, the record format of an old data set is not changed. For a new data set, the input record format (if any), or U is used.

Note: To create data with a record format not shown here, allocate the data set with the TSO ALLOCATE command to ddname QSAMOUT.

Record length

The length of the records to be created. Range is dependent upon the record format.

If the record format is VBS, the record length may be specified as 32768, meaning that you are defining an LRECL=X data set.

Block size

The average size of the physical blocks to be written.

Range: 0-32760

Data set type

Leave blank to request the system default data set type.

Library

Requests a PDSE. An active SMS is required.

PDS

Requests a PDS.

BASIC

Requests a basic sequential data set, which has a limit of 65535 tracks per volume.

LARGE

Requests a large format data set.

EXTR

Requests a extended format data set as required. An active SMS is required.

EXTP

Requests a extended format data set as preferred. An active SMS is required.

Data set version

The version number for a PDSE (data set type LIBRARY) or an extended format sequential data set (data set type EXTR or EXTP).

If zero is specified or the value is omitted the system default for the version is assigned.

Range: 0-2

Max. generations

The maximum number of generations maintained by the system for the members in a version 2 PDSE. The upper value might be limited by MAXGENS_LIMIT in the IGDSMSxx member of PARMLIB.

Range: 0-2000

Allocate EAS

Defines if a data set should be allocated in the Extended Addressing Space of an Extended Address Volume. Blanks indicate EATTR has not been specified.

NO

Cannot reside in an EAS.

OPT

Can optionally reside in an EAS.

Release unused

Specify YES to release any unused space when the data set is closed. The default is to keep the space allocated.

Expiration date

Use this field to protect valuable data by specifying a date from which the data set can be deleted. If you try to delete an unexpired data set, ISPF first displays a Confirm Delete panel followed by a Confirm Purge panel.

An expiration date is not required, but if you enter one it should be in one of these formats:

YYYY/MM/DD

Date shown in year, month, and day. The maximum expiration date allowed is 2155/12/31.

YYYY.DDD

Date shown in Julian format, such as 2026.066 for March 7, 2026. The maximum expiration date allowed is 2155.365. You can specify a DDD value of up to 366 if the YYYY value represents a leap year.

DDDD

The number of days, starting with the creation date, after which the data set can be deleted. DDDD has a range of 1 to 9999.

PERM, NOLIMIT, NEVER, 9999

Any one of these values is translated to a value of 1999.365. This is treated as permanent retention.