Programming Interface Information:
The Monitor Records are intended Programming Interfaces that
allow the customer to write programs to obtain services of z/VM.
Control Block Contents
DSECT NAME - IODALS FUNCTION - Map the Monitor Record for Domain 6, Record 10 LOCATED BY - Through the Monitor Control Area REFERENCED CONTROL BLOCKS - MRRECHDR Monitor Record Header NAME - MRIODALS DESCRIPTIVE NAME - Monitor Event Record Domain 6 - I/O Domain Record 10 - Automated Tape Library Statistics DESCRIPTION - Statistics data of the 3495 Tape Library Dataserver, obtained from the tape controller with a Read Subsystem Data CCW in response to an unsolicited unit check with an ERA code of x'7A' in the sense. NOTES: - The statistics data in IODALS_DATA pertains only to the 3495 device and not to a tape unit or tape control unit. The mapping of these statistics is documented in the hardware reference manual for the 3494 Tape Library Dataserver. - In order to collect this record on a regular basis, the entire range of tape units under the control of the 3495 Dataserver should be enabled for event monitoring in the I/O domain. - IODALS_CALDATOF should always be used to locate the IODALS_DATA data area. Its value may change.
MRIODALS Control Block ContentsOffsets Dec Hex Type Len Name (Dim) Description 0 0 Structure 24 IODALS Start of monitor record 0 0 Character 0 IODALS_MRHDR Record header. See MRRECHDR for details. 0 0 Character 20 MRHDR 0 0 Unsigned 2 MRHDRLEN record length in bytes 2 2 Unsigned 2 MRHDRZER field of zeros 4 4 Unsigned 1 MRHDRDM domain identifier 5 5 Unsigned 1 * 6 6 Unsigned 2 MRHDRRC record identifier 8 8 Character 8 MRHDRTOD Time at which this record was built. In time-of-day (TOD) clock format. See IBM System 370 XA Principle of Operation for explanation of format. 16 10 Character 4 * 20 14 Character 0 MRHDR_END End of header 20 14 Signed 2 IODALS_CALDATOF Byte offset, relative from the start of this record, to the IODALS_DATA library statistics area 22 16 Signed 2 IODALS_CALDATLN Length, in bytes, of the IODALS_DATA library statistics area 24 18 Character 0 IODALS_DATA Library Statistics data, as returned by the 3495 Control Unit. IODALS_CALDATOF should be used to get the correct location. IODALS_CALDATLN should be used to get the length.
MRIODALS Cross ReferenceHex Hex Name Offset Length Value IODALS 0 24 IODALS_CALDATLN 16 2 IODALS_CALDATOF 14 2 IODALS_DATA 18 0 IODALS_MRHDR 0 0 MRHDR 0 20 MRHDR_END 14 0 MRHDRDM 4 1 MRHDRLEN 0 2 MRHDRRC 6 2 MRHDRTOD 8 8 MRHDRZER 2 2
This information is based on z/VM V4R3.0.
Last updated on 1 May 2002 at 16:20:33.
Copyright IBM Corporation, 1990, 2002