gtps4m2z | System Generation |
The LOGCAP macro is used to specify information relating to LOG/XCP processing. Values are entered to specify the online module ranges to be assigned to each of the LOG/XCP exception recording tapes. LOGCAP is required if the capture/restore facility is desired. Detailed explanations of how to initialize these fields are available in "File Capture and Restore" in the TPF Database Reference.
LOGCAP is required if the capture/restore facility is desired.
Format
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At least one of these parameters must be defined. It does not matter which one is supplied.
This range defines the valid disk low and high contiguous module numbers assigned to this tape for LOG/XCP capture/restore.
Tapes must cover all disk module numbers on the system without overlaps. For example, a system with 4 device A and 2 device B modules might be assigned:
RTV = (DEVA,0,DEVA,1) RTU = (DEVA,2,DEVA,3) RTY = (DEVB,0,DEVB,0) RTW = (DEVB,1,DEVB,1)
Examples
LOG/XCP recording is to be done to tape name RTV for device A. This device has two modules. All other values can default. Code the LOGCAP macro as follows:
LOGCAP RTV=(DEVA,0,DEVA,1)
Possible errors in assigning disk modules with the same system might be:
RTT = (DEVA,1,DEVA,3) RTY = (DEVB,0,DEVB,1) all modules not included
or,
RTY = (DEVA,0,DEVA,2) RTY and RTW overlap. They both attempt RTW = (DEVA,2,DEVA,3) to map DEVA 2. RTY = (DEVB,0,DEVB,1)
References