gtpm1m3yTPF V4R1 Migration Guide: 3.1 to 4.1

Block Checking Mode

Block checking mode is a debugging tool that flags certain coding errors, such as writing beyond the end of a block, passing blocks chained to other blocks, and using storage that has already been released.

When block checking mode is turned on:

You can turn on and turn off block checking mode by using the ZSTRC command without re-IPLing the TPF 4.1 system.

Note:
You should use block checking mode with caution in a production system, because block checking mode degrades CPU performance and depletes working storage.

To Turn On Block Checking Mode

  1. Issue the ZSTRC ALTER BLKCHK command by entering ZSTRC ALTER BLKCHK.

To Turn Off Block Checking Mode

  1. Issue the ZSTRC ALTER NOBLKCHK command by entering ZSTRC ALTER NOBLKCHK.