HP 3000 Manuals HP 3000 Manuals
Recovery limitations
Device recovery
The NMS uses all available device features to aid in device recovery,
either automatically (following a device power failure) or manually
triggered by an operator.
* The CIPER devices support page checkpoints. The spooler uses the
checkpoints to recover quickly to a specific page. Refer to
appendix D for detailed information on checkpoints.
* The HP 2680, HP 2688, and HP 5000 series perform Page Level
Recovery (PLR), which uses a silent run technique from the
beginning of the file to the point of recovery. The devices's
knowledge of pages ensures that output resumes correctly. Refer
to appendix D for detailed information on Page Level Recovery.
* A serial printer has no feedback to tell the spooler of its page
location. Output may not resume at the correct page boundary, or
the page boundary may be shifted.
A full discussion of paging exists in the description of the
SPOOLER...;RESUME command in chapter 4.
Spool file recovery
* The system preserves output spool files for all system startups
except INSTALL.
* Job input spool files have a one-to-one correspondence with job
master table (JMAT) entries. The JMAT is still a CM table, so it
is still rebuilt for updates and START NORECOVERY. Whenever an
update or START NORECOVERY occurs, the system purges all input
spool files.
* The NMS retains output spool files until the device positively
notifies the spooler that paper output is in the output station
and error free.
See appendix C for more information about recovery.