Finding the logrec and WTO recording control buffers

There are two recording control buffers (RCB) in the SQA. The system uses one buffer for logrec messages, and the other for WTO messages. The CVT+X'16C' (CVTRBCB) points to the recording buffers control block (RBCB). The RBCB contains the following information about the two recording control blocks (which are also referred to as RCBs or buffers):

For the logrec RCB:

RBCB+X'10' (RBCBLRCB) points to the logrec buffer.
RBCB+X'14' (RBCBLLEN) contains the length of the logrec buffer.

For the WTO RCB:

RBCB+X'18' (RBCBWRCB) points to the WTO buffer.
RBCB+X'1C' (RBCBWLEN) contains the length of the WTO buffer.

The logrec and WTO recording control buffers reside in fetch-protected SQA. Entries in these buffers have time stamps (8-byte TOD clock values) that allow you to look at a dump and create a chronological list of the logrec events and WTO messages.