Defining mount and fetch messages: MNTMSG

Use the MNTMSG command to tailor mount and fetch messages so they display the volume serial number, rack number, and pooling decision. The pooling decision can be a pool prefix, pool name, or storage group name. The operator can use this information to pull and mount volumes.

MNTMSG is an optional parmlib command. Specify a MNTMSG command for any message you want DFSMSrmm to update. When you specify the MNTMSG command, you must include all the MNTMSG operands.

DFSMSrmm inserts the required information within the message text (if the message has no continuation lines) or at the end of the message based on the value you use with the RACK operand. For nonspecific mount requests, if you have defined a pool name with the VLPOOL command, DFSMSrmm provides a pool name or storage group name rather than a pool prefix in the message. DFSMSrmm updates mount messages with a pool name only when DFSMSrmm updates messages at the end of the message text.

Use the VOLUME operand to define the position of the volume serial number in a message. Figure 1 shows examples of the parmlib member EDGRMMxx MNTMSG command specified with the VOLUME operand defined for 4-digit device numbers. If your definitions specify a volume serial number offset 1 less than the value shown in the examples, your definitions are from z/OS supported 3-digit device numbers and should be updated to match the position of the volume serial number when 4-digit device numbers are used.

Figure 1. Parmlib member EDGRMMxx MNTMSG command examples for 4-digit devices

     /* MNTMSG - Add RACK= or POOL= at end of WTOs            */
MNTMSG  MSGID(IEF233A)      ID(1) VOLUME(16) RACK(999)
MNTMSG  MSGID(IEF233D)      ID(1) VOLUME(16) RACK(999)
MNTMSG  MSGID('IEF234E K')  ID(1) VOLUME(16) RACK(999)
MNTMSG  MSGID('IEF234E R')  ID(1) VOLUME(16) RACK(999)
MNTMSG  MSGID('IEF234E D')  ID(1) VOLUME(16) RACK(999)
MNTMSG  MSGID('IEF455D')    ID(1) VOLUME(16) RACK(999)
MNTMSG  MSGID(IEC501A)      ID(1) VOLUME(16) RACK(999)
MNTMSG  MSGID('IEC502E K')  ID(1) VOLUME(16) RACK(999)
MNTMSG  MSGID('IEC502E D')  ID(1) VOLUME(16) RACK(999)
MNTMSG  MSGID('IEC502E R ') ID(1) VOLUME(16) RACK(999)
MNTMSG  MSGID('IEC502E RD') ID(1) VOLUME(17) RACK(999)
MNTMSG  MSGID('IEC502E RK') ID(1) VOLUME(17) RACK(999)
MNTMSG  MSGID(IAT5110) ID(1) VOLUME(44) RACK(999)
MNTMSG  MSGID(IAT5210) ID(1) VOLUME(50) RACK(999)
MNTMSG  MSGID(IAT5410) ID(1) VOLUME(20) RACK(999)

JES3 Considerations: When you use the JES3 IATUX71 exit, use the RACK operand to determine if you want the rack number to replace the volume serial number in the message or appended to the end of the message. If the RACK operand value indicates a position within the length of the message, DFSMSrmm replaces the volume serial number in the message with the required information. If the RACK operand value exceeds the message length, DFSMSrmm appends the information to the end of the message.

When the JES3 IATUX71 exit is not used, use the TYPE=MCS keyword on at least one CONSOLE statement in the JES3 parmlib. This activates JES3 MCS console support so JES3 issues messages as WTO messages rather than directly to JES3 consoles.