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

#### MDCBK

Prolog

Control Block Contents
MDCBK DSECT

Storage Layout

Cross Reference (Contains links to field and bit definitions)

#### MDCBK Prolog

     Name       : HCPMDCBK
     Description: Storage area for SET MDC/Q MDC cmnds
     DSECT      : MDCBK
     Function   : Reponse buffer and work area for SET MDC
                  and Query MDC commands
     Located by : Registers in HCPMCP, HCPMCR, HCPMCQ, HCPMCO,
                  HCPMCN
     Created by : HCPMCP and HCPMCO
     Deleted by : HCPMCP and HCPMCO
     Serialized : None required

#### MDCBK Control Block Content

#### MDCBK DSECT

    Hex   Dec Type/Val   Lng Label (dup)    Comments
    ---- ---- --------- ---- -------------- --------
    0000    0 Structure      MDCBK          Storage area for SET MDC/Q MDC
                                            cmnds
    0000    0 Dbl-Word     8 MDCPLIST (0)   Start of parameter list used by
                                            parser
    0000    0 Signed       4 MDCWORD1 (0)   First word of parser parms
    0000    0 Bitstring    1 MDCFLAG1       Flag byte 1
              1... ....      MDCON          X'80' ON was issued
              .1.. ....      MDCOFF         X'40' OFF was issued
              ..1. ....      MDCFLUSH       X'20' FLUSH was issued
              ...1 ....      MDCSYS         X'10' SYSTEM was issued
              .... 1...      MDCRDV         X'08' RDEV was issued
              .... .1..      MDCMDISK       X'04' MDISK was issued
              .... ..1.      MDC1DEV        X'02' Only 1 device was issued
              .... ...1      MDCDRCT        X'01' DRCT option was issued
    0001    1 Bitstring    1 MDCFLAG2       Flag byte 2
              .1.. ....      MDCUSER        X'40' USERID was specified
              ..1. ....      MDCMNST        X'20' STORAGE was issued
              ...1 ....      MDCXST         X'10' XSTORE was issued
              .... 1...      MDCMAX         X'08' MAX was issued
              .... .1..      MDCSIZE1       X'04' At least 1 token was issued
              .... ..1.      MDCSIZE2       X'02' 2 tokens were issued
              .... ...1      MDCALL         X'01' ALL was issued
    0002    2 Bitstring    1 MDCFLAG3       Flag byte 3 (cleared after each
                                            device in range has completed
                                            processing). Flag only used when
                                            for RDEV and MDISK and class G
                                            flush options.
              1... ....      MDCTCLCK       X'80' Main MDC lock held
              .1.. ....      MDCRDLCK       X'40' RDEV lock held
    0003    3 Bitstring    1 MDCFLAG4       Flag byte 4
              1... ....      MDC1OK         X'80' At least one device was
                                            processed successfully
              .1.. ....      MDCNOLOG       X'40' User specified not logged
                                            on
              ..1. ....      MDCINS         X'20' INSERT option requested
              ...1 ....      MDCDET         X'10' DETAILS option requested
              .... 1...      MDCDFON        X'08' DFLTON was requested
              .... .1..      MDCDFOFF       X'04' DFLTOFF was requested
              .... ..1.      MDCERRNG       X'02' Error encountered while
                                            processing a range
              .... ...1      MDCBIAS        X'01' MDC BIAS requested
    0004    4 Signed       4 MDCWORD2 (0)   Second word of parser parms
    0004    4 Bitstring    1 MDCFLAG5       Flag byte 5
              1... ....      MDCRECRD       X'80' RECORDMDC specified
    0005    5 Bitstring    3 *              Reserved
    0008    8 Dbl-Word     8 MDCDEVS (0)    Device range specified
    0008    8 Signed       4 MDCDEVL        First device
              00000004       MDCDEVSZ       *-MDCDEVL Length of 1 device
    000C   12 Signed       4 MDCDEVH        2nd device (1st=2nd if only one
                                            was specified)
    0010   16 Character    8 MDCNAME        Userid specified
              00000008       MDCNMSZ        *-MDCNAME Length of userid
    0018   24 Character    8 MDCTOK1        First min/max token
              00000008       MDCTOKSZ       *-MDCTOK1 Length of a token
    0020   32 Character    8 MDCTOK2        Second min/max token
              00000028       MDCPLEN        *-MDCBK End of parm list for
                                            parser
    0028   40 Signed       2 MDCDEVC        Current device
    002A   42 Signed       2 * (0)          Reserved for IBM use
          The following sequence handles message 7335-01.
    002A   42 Character    9 MDCACT         Action to specify in message
    0033   51 Character    1 MDCA1          Fence
          The following sequence handles messages 0045-01, 1921-02,
          1921-04, 7337-01, 7337-02, 7340-01.
    0034   52 Character    1 MDCSUB (0)
    0034   52 Character    8 MDCAUSR        Userid in message
    003C   60 Character    1 MDCA2          fence
    003D   61 Character    4 MDCADEVL       Low/only device in range
    0041   65 Character    1 MDCA3          fence
    0042   66 Character    4 MDCADEVH       High device in range
    0046   70 Character    1 MDCA4          fence
          The following sequence handles message 7338-01.
    0047   71 Character    1 MDCMAIN (0)
    0047   71 Character    8 MDCMNMIN       Minimum of main storage
    004F   79 Character    1 MDCS1          fence
    0050   80 Character    8 MDCMNMAX       Maximum of main storage
    0058   88 Character    1 MDCS2          fence
    0059   89 Character    8 MDCMNUSE       Amount in use of main storage
    0061   97 Character    1 MDCS3          fence
    0062   98 Character    8 MDCMBIAS       BIAS for main storage
    006A  106 Character    1 MDCS4          fence
          The following sequence handles messages 7339-01, 7339-02,
          7339-03.
    006B  107 Character    1 MDCXSTOR (0)
    006B  107 Character    8 MDCXSMIN       Minimum of xstore
    0073  115 Character    1 MDCS5          fence
    0074  116 Character    8 MDCXSMAX       Maximum of xstore
    007C  124 Character    1 MDCS6          fence
    007D  125 Character    8 MDCXSUSE       Amount in use of xstore
    0085  133 Character    1 MDCS7          fence
    0086  134 Character    8 MDCXBIAS       BIAS for XSTORE
    008E  142 Character    1 MDCS8          fence
    008F  143 Character    8 MDCXSMXP       Maximum pending of xstore
    0097  151 Character    1 MDCS9          fence
    0098  152 Character    8 MDCXSMNP       Minimum pending of xstore
    00A0  160 Character    1 MDCS10         fence
          The following sequence handles messages 1921-01, 1921-03,
          7336-01, 7336-02.
    0034   52 Character    4 MDCBDEVL       Low/only device in range
    0038   56 Character    1 MDCB1          fence
    0039   57 Character    4 MDCBDEVH       High device in range
    003D   61 Character    1 MDCB2          fence
          The following sequence handles message 7341-01.
    002A   42 Character    3 MDCLPATH       MDC availability (on,off)
    002D   45 Character    1 MDCL1          fence
    002E   46 Character    7 MDCLMSTT       Status of minidisk
    0035   53 Character    1 MDCL2          fence
    0036   54 Character    8 MDCLUSER       Userid owning minidisk
    003E   62 Character    1 MDCL3          fence
    003F   63 Character    4 MDCLVDEV       Owning vdev number
    0043   67 Character    1 MDCL4          fence
          The following sequence handles message 7342-01.
    002A   42 Character    4 MDCQIDEV       Input vdev number
    002E   46 Character    1 MDCQ0          fence
    002F   47 Character    3 MDCQPATH       MDC availability (on,off)
    0032   50 Character    1 MDCQ1          fence
    0033   51 Character    7 MDCQMSTT       Status of minidisk
    003A   58 Character    1 MDCQ2          fence
    003B   59 Character    8 MDCQUSER       Userid owning minidisk
    0043   67 Character    1 MDCQ3          fence
    0044   68 Character    4 MDCQVDEV       Owning vdev number
    0048   72 Character    1 MDCQ4          fence
    0049   73 Character    9 MDCQRSTT       Status of rdev
    0052   82 Character    1 MDCQ5          fence
    0053   83 Character    4 MDCQRDEV       Rdev number
    0057   87 Character    1 MDCQ6          fence
          The following sequence handles message 0003-01.
    0034   52 Character    8 MDCOPT         Invalid option entered
    003C   60 Character    1 MDCO1          fence
          The following sequence handles message 1921-05.
    0034   52 Character    6 MDCSSYS        System
    003A   58 Character    1 MDCSS1         fence
    003B   59 Character    4 MDCSSYSC       Code number
    003F   63 Character    1 MDCSS2         fence
              00000015       MDCSIZE        (*-MDCBK+7)/8 Size, in
                                            doublewords, of MDCBK

#### MDCBK Storage Layout

    *** MDCBK - Storage area for SET MDC/Q MDC cmnds
    *
    *     +------+------+------+------+------+--------------------+
    *   0 |:FLAG1|:FLAG2|:FLAG3|:FLAG4|:FLAG5|////////////////////|
    *     +------+------+------+------+------+--------------------+
    *   8 |         MDCDEVL           |         MDCDEVH           |
    *     +---------------------------+---------------------------+
    *  10 |                       MDCNAME                         |
    *     +-------------------------------------------------------+
    *  18 |                       MDCTOK1                         |
    *     +-------------------------------------------------------+
    *  20 |                       MDCTOK2                         |
    *     +-------------+-----------------------------------------+
    *  28 |  MDCDEVC    |                 MDCACT                  |
    *     +-------------+      +------+---------------------------+
    *  30 |                    |MDCA1 |         MDCAUSR-          |
    *     +--------------------+------+------+--------------------+
    *  38 |          -(034)           |MDCA2 |     MDCADEVL-      |
    *     +------+------+-------------+------+------+------+------+
    *  40 |-(03D)|MDCA3 |         MDCADEVH          |MDCA4 |(047)-|
    *     +------+------+---------------------------+------+------+
    *  48 |                   -MDCMNMIN                    |MDCS1 |
    *     +------------------------------------------------+------+
    *  50 |                       MDCMNMAX                        |
    *     +------+------------------------------------------------+
    *  58 |MDCS2 |                   MDCMNUSE-                    |
    *     +------+------+-----------------------------------------+
    *  60 |-(059)|MDCS3 |               MDCMBIAS-                 |
    *     +------+------+------+----------------------------------+
    *  68 |   -(062)    |MDCS4 |            MDCXSMIN-             |
    *     +-------------+------+------+---------------------------+
    *  70 |      -(06B)        |MDCS5 |        MDCXSMAX-          |
    *     +--------------------+------+------+--------------------+
    *  78 |          -(074)           |MDCS6 |      (07D)-        |
    *     +---------------------------+------+------+-------------+
    *  80 |            -MDCXSUSE             |MDCS7 |   (086)-    |
    *     +----------------------------------+------+------+------+
    *  88 |               -MDCXBIAS                 |MDCS8 |(08F)-|
    *     +-----------------------------------------+------+------+
    *  90 |                   -MDCXSMXP                    |MDCS9 |
    *     +------------------------------------------------+------+
    *  98 |                       MDCXSMNP                        |
    *     +------+------------------------------------------------+
    *  A0 |MDCS10| A1
    *     +------+
    *
    *** MDCBK - Storage area for SET MDC/Q MDC cmnds

    *** Overlay for MDCSUB in MDCBK
    *
    *                                 +---------------------------+
    *  30 ...                      34 |         MDCBDEVL          |
    *     +------+--------------------+------+------+-------------+
    *  38 |MDCB1 |         MDCBDEVH          |MDCB2 | 3E
    *     +------+---------------------------+------+
    *
    *** Overlay for MDCSUB in MDCBK

    *** Overlay for MDCACT in MDCBK
    *
    *                   +--------------------+------+-------------+
    *  28 ...        2A |     MDCLPATH       |MDCL1 |   (02E)-    |
    *     +-------------+--------------------+------+-------------+
    *  30 |            -MDCLMSTT             |MDCL2 |   (036)-    |
    *     +----------------------------------+------+------+------+
    *  38 |               -MDCLUSER                 |MDCL3 |(03F)-|
    *     +--------------------+------+-------------+------+------+
    *  40 |     -MDCLVDEV      |MDCL4 | 44
    *     +--------------------+------+
    *
    *** Overlay for MDCACT in MDCBK

    *** Overlay for MDCACT in MDCBK
    *
    *                   +---------------------------+------+------+
    *  28 ...        2A |         MDCQIDEV          |MDCQ0 |(02F)-|
    *     +-------------+------+--------------------+------+------+
    *  30 | -MDCQPATH   |MDCQ1 |            MDCQMSTT-             |
    *     +-------------+------+----------------------------------+
    *  38 |   -(033)    |MDCQ2 |            MDCQUSER-             |
    *     +-------------+------+------+---------------------------+
    *  40 |      -(03B)        |MDCQ3 |         MDCQVDEV          |
    *     +------+-------------+------+---------------------------+
    *  48 |MDCQ4 |                   MDCQRSTT                     |
    *     +------+      +------+---------------------------+------+
    *  50 |             |MDCQ5 |         MDCQRDEV          |MDCQ6 |
    *     +-------------+------+---------------------------+------+
    *  58
    *
    *** Overlay for MDCACT in MDCBK

    *** Overlay for MDCSUB in MDCBK
    *
    *                                 +---------------------------+
    *     ...                      34 |         MDCOPT-           |
    *     +---------------------------+------+--------------------+
    *  38 |          -(034)           |MDCO1 | 3D
    *     +---------------------------+------+
    *
    *** Overlay for MDCSUB in MDCBK

    *** Overlay for MDCSUB in MDCBK
    *
    *                                 +---------------------------+
    *     ...                      34 |         MDCSSYS-          |
    *     +-------------+------+------+--------------------+------+
    *  38 |   -(034)    |MDCSS1|         MDCSSYSC          |MDCSS2|
    *     +-------------+------+---------------------------+------+
    *  40
    *
    *** Overlay for MDCSUB in MDCBK

#### MDCBK Cross Reference

    Symbol         Dspl Value
    -------------- ---- -----
    MDCACT         002A
    MDCADEVH       0042
    MDCADEVL       003D
    MDCALL         0001 01
    MDCAUSR        0034
    MDCA1          0033
    MDCA2          003C
    MDCA3          0041
    MDCA4          0046
    MDCBDEVH       0039
    MDCBDEVL       0034
    MDCBIAS        0003 01
    MDCB1          0038
    MDCB2          003D
    MDCDET         0003 10
    MDCDEVC        0028
    MDCDEVH        000C
    MDCDEVL        0008
    MDCDEVS        0008
    MDCDEVSZ       0008 00000004
    MDCDFOFF       0003 04
    MDCDFON        0003 08
    MDCDRCT        0000 01
    MDCERRNG       0003 02
    MDCFLAG1       0000
    MDCFLAG2       0001
    MDCFLAG3       0002
    MDCFLAG4       0003
    MDCFLAG5       0004
    MDCFLUSH       0000 20
    MDCINS         0003 20
    MDCLMSTT       002E
    MDCLPATH       002A
    MDCLUSER       0036
    MDCLVDEV       003F
    MDCL1          002D
    MDCL2          0035
    MDCL3          003E
    MDCL4          0043
    MDCMAIN        0047
    MDCMAX         0001 08
    MDCMBIAS       0062
    MDCMDISK       0000 04
    MDCMNMAX       0050
    MDCMNMIN       0047
    MDCMNST        0001 20
    MDCMNUSE       0059
    MDCNAME        0010
    MDCNMSZ        0010 00000008
    MDCNOLOG       0003 40
    MDCOFF         0000 40
    MDCON          0000 80
    MDCOPT         0034
    MDCO1          003C
    MDCPLEN        0020 00000028
    MDCPLIST       0000
    MDCQIDEV       002A
    MDCQMSTT       0033
    MDCQPATH       002F
    MDCQRDEV       0053
    MDCQRSTT       0049
    MDCQUSER       003B
    MDCQVDEV       0044
    MDCQ0          002E
    MDCQ1          0032
    MDCQ2          003A
    MDCQ3          0043
    MDCQ4          0048
    MDCQ5          0052
    MDCQ6          0057
    MDCRDLCK       0002 40
    MDCRDV         0000 08
    MDCRECRD       0004 80
    MDCSIZE        003F 00000015
    MDCSIZE1       0001 04
    MDCSIZE2       0001 02
    MDCSSYS        0034
    MDCSSYSC       003B
    MDCSS1         003A
    MDCSS2         003F
    MDCSUB         0034
    MDCSYS         0000 10
    MDCS1          004F
    MDCS10         00A0
    MDCS2          0058
    MDCS3          0061
    MDCS4          006A
    MDCS5          0073
    MDCS6          007C
    MDCS7          0085
    MDCS8          008E
    MDCS9          0097
    MDCTCLCK       0002 80
    MDCTOKSZ       0018 00000008
    MDCTOK1        0018
    MDCTOK2        0020
    MDCUSER        0001 40
    MDCWORD1       0000
    MDCWORD2       0004
    MDCXBIAS       0086
    MDCXSMAX       0074
    MDCXSMIN       006B
    MDCXSMNP       0098
    MDCXSMXP       008F
    MDCXST         0001 10
    MDCXSTOR       006B
    MDCXSUSE       007D
    MDC1DEV        0000 02
    MDC1OK         0003 80

This information is based on z/VM V5R2.0. Last updated on 12 Apr 2006 at 17:04:48 EDT.
Copyright IBM Corporation, 1990, 2005