SDWBK | Back to Index page

| Prolog Control Block Contents SDWBK DSECT Storage Layout Cross Reference (Contains links to field and bit definitions) |
Programming Interface Information: This information is NOT intended to be used as Programming Interfaces of z/VM.

SDWBK Prolog | Top of page

     NAME       : HCPSDWBK
     DESCRIPTION: Stand-alone dump writer partition record
     DSECT      : SDWBK
     FUNCTION   : The SDWBK describes the contents of the stand-alone dump
                  record that is written to the start of each partition.
     LOCATED BY : It is first data record in each partition written to by
                  stand-alone dump.
     CREATED BY : Stand-alone dump installer.
     DELETED BY : Not applicable
     REFERENCES : HCPDLJ - part of DUMPLD2
     SERIALIZED : Single-threaded nature of stand-alone dump process
     RELOCATION CONSIDERATIONS : None
     COMPATIBILITY AND MIGRATION CONCERNS : None
     NOTES      : - The SDWBK is a 4K structure.

SDWBK Control Block Content | Top of page

     SDWBK DSECT
    Top of page

    Hex   Dec Type/Val   Lng Label (dup)    Comments
    ---- ---- --------- ---- -------------- --------
    0000    0 Structure      SDWBK          Stand-alone dump writer partition record
                                   | + .1 .+ .2
    0000    0 Character   16 SDW_ID         "HCPSDWBK V1.0 "
    0010   16 Signed       4 * (6)          Reserved for IBM use
    0028   40 Dbl-Word     8 SDW_TOD        Dump started TOD clock
    0030   48 Signed       4 SDW_Dev_Index  Index of this device in Dump
                                            Status Table
    0034   52 Signed       4 SDW_Dump_Dev   Index during actual dump
    0038   56 Dbl-Word     8 SDW_Pages_Out  Number of pages written to this
                                            device
    0040   64 Dbl-Word     8 SDW_TOD_Start  TOD when started writing to this
                                            device
    0048   72 Dbl-Word     8 SDW_TOD_End    TOD when done writing to this
                                            device
              00000050       SDW_Rsv        *-SDWBK Start of reserved space
    0050   80 Character    1 *              Reserved for IBM Use
              00001000       SDWBSIZE       *-SDWBK Size in bytes

SDWBK Storage Layout | Top of page

    *** SDWBK - Stand-alone dump writer partition record
    *
    *     +-------------------------------------------------------+
    *   0 |                        SDW_ID                         |
    *     |                                                       |
    *     +-------------------------------------------------------+
    *  10 |///////////////////////////////////////////////////////|
    *     =///////////////////////////////////////////////////////=
    *     |///////////////////////////////////////////////////////|
    *     +-------------------------------------------------------+
    *  28 |                       SDW_TOD                         |
    *     +---------------------------+---------------------------+
    *  30 |      SDW_DEV_INDEX        |       SDW_DUMP_DEV        |
    *     +---------------------------+---------------------------+
    *  38 |                    SDW_PAGES_OUT                      |
    *     +-------------------------------------------------------+
    *  40 |                    SDW_TOD_START                      |
    *     +-------------------------------------------------------+
    *  48 |                     SDW_TOD_END                       |
    *     +------+------------------------------------------------+
    *  50 |//////|////////////////////////////////////////////////|
    *     +------+////////////////////////////////////////////////|
    *  58 |///////////////////////////////////////////////////////|
    *     =///////////////////////////////////////////////////////=
    *     |///////////////////////////////////////////////////////|
    *     +-------------------------------------------------------+
    *1000
    *
    *** SDWBK - Stand-alone dump writer partition record

SDWBK Cross Reference | Top of page

    Symbol         Dspl Value
    -------------- ---- -----
    SDW_Dev_Index  0030
    SDW_Dump_Dev   0034
    SDW_ID         0000
    SDW_Pages_Out  0038
    SDW_Rsv        0048 00000050
    SDW_TOD        0028
    SDW_TOD_End    0048
    SDW_TOD_Start  0040
    SDWBSIZE       0050 00001000

This information is based on z/VM 7.2.0 Last updated on 24 Jun 2020 at 09:30:23 EDT.
Copyright IBM Corporation, 1990, 2020