Programming Interface Information: This information is NOT intended to be used as Programming Interfaces of z/VM.

#### CSEEHDBK

Prolog

Control Block Contents
CSEEHDBK DSECT

Storage Layout

Cross Reference (Contains links to field and bit definitions)

#### CSEEHDBK Prolog

     NAME       : CSEEHDBK
     DESCRIPTION: CSL header record for ECKD devices
     DSECT      : CSEEHDBK
     FUNCTION   : Map the Cross System Link header record for
                  ECKD devices.  There is one header record on
                  every volume that has been XLINK FORMATted
                  with an ECKD channel program.
     LOCATED BY : N/A
     CREATED BY : N/A
     DELETED BY : N/A
     SERIALIZED : N/A

#### CSEEHDBK Control Block Content

#### CSEEHDBK DSECT

    Hex   Dec Type/Val   Lng Label (dup)    Comments
    ---- ---- --------- ---- -------------- --------
    0000    0 Structure      CSEEHDBK       CSL header record for ECKD
                                            devices
    0000    0 Character    8 ISFEHHDR       CSE version, release, level
    0008    8 Character    8 ISFEUSER       Userid who did the XLINK FORMAT
    0010   16 Character    8 ISFESYSN       System that did the XLINK FORMAT
    0018   24 Character    8 ISFEDATE       Date of XLINK FORMAT
    0020   32 Character    8 ISFETIME       Time of XLINK FORMAT
    0028   40 Character    8 ISFECHK        Indicates formatted for ECKD
    0030   48 Signed       2 ISFEFREC       Number of records formatted
    0032   50 Bitstring    1 * (6)          Reserved for future use
              00000038       ISFEHDRL       *-CSEEHDBK Length of header
                                            record

#### CSEEHDBK Storage Layout

    *** CSEEHDBK - CSL header record for ECKD devices
    *
    *     +-------------------------------------------------------+
    *   0 |                       ISFEHHDR                        |
    *     +-------------------------------------------------------+
    *   8 |                       ISFEUSER                        |
    *     +-------------------------------------------------------+
    *  10 |                       ISFESYSN                        |
    *     +-------------------------------------------------------+
    *  18 |                       ISFEDATE                        |
    *     +-------------------------------------------------------+
    *  20 |                       ISFETIME                        |
    *     +-------------------------------------------------------+
    *  28 |                       ISFECHK                         |
    *     +-------------+-----------------------------------------+
    *  30 |  ISFEFREC   |/////////////////////////////////////////|
    *     +-------------+-----------------------------------------+
    *  38
    *
    *** CSEEHDBK - CSL header record for ECKD devices

#### CSEEHDBK Cross Reference

    Symbol         Dspl Value
    -------------- ---- -----
    ISFECHK        0028
    ISFEDATE       0018
    ISFEFREC       0030
    ISFEHDRL       0032 00000038
    ISFEHHDR       0000
    ISFESYSN       0010
    ISFETIME       0020
    ISFEUSER       0008

This information is based on z/VM V5R2.0. Last updated on 12 Apr 2006 at 16:38:02 EDT.
Copyright IBM Corporation, 1990, 2005