TACL Reference Manual

UTILS:TACL Commands and Functions
HP NonStop TACL Reference Manual—429513-018
8-132
RCVDUMP Program (Super-Group or Super ID
Only)
RCVDUMP Program (Super-Group or Super ID Only)
Use the RCVDUMP program to dump the memory of a processor to a disk file. The
processor being dumped can be running or halted. The processor from which the
RCVDUMP program is run must have X or Y fabric (G-series and H-series RVUs) or X
bus or Y bus (D-series RVUs) access to the processor being dumped.
For G-series and H-series RVUs, you must have the super ID (255,255) to issue this
command. For D-series RVUs, you must have a super-group user ID (255,user-id-
number).
Beginning with the H06.07 RVU in H-series releases and with all J-series RVUs,
RCVDUMP and ONLINDMP (which is run by RCVDUMP to do an ONLINE dump or a
PARALLEL dump) terminate immediately, if run under other than a super-group user
ID. As normally installed, RCVDUMP can only be run under the super ID (255,255). If
on a particular system you want to allow RCVDUMP to be run under any super-group
user ID (255, user-id-number), you can use FUP to license the RCVDUMP and
ONLINDMP files located in the relevant $SYSTEM.SYSnn subvolume.
When a processor is dumped to disk, the RCVDUMP utility copies the dump in a
compressed format from the specified processor to a disk file.
Pressing the BREAK key while the RCVDUMP program is running causes RCVDUMP
to abend or stop, and leaves the memory dump unfinished. If this happens, you must
purge the dump file and restart the RCVDUMP program
The hardware architecture of H-series systems requires a change of terminology.
H-series uses logical processors that consist of one to three physical processors
known as processor elements (PEs). The logical processor is what used to be called
the CPU. For availability issues, the processor elements are all located on different
circuit boards. These boards are known as blades (or slices) and are identified by the
letters A, B, or C. With this particular command you may be concerned with dumping
one or more PEs from one or more slices. The PARALLEL method is a time-saving way
to dump the memory of a single PE.
Extracted Memory Dump
The RCVDUMP utility enables dumping of a subset of the full memory in an extracted
dump file that should almost always be sufficient to analyze the processor halt. An
extracted dump file may or may not be created in addition to or instead of a full dump
file. An extracted dump file can be transferred to the Global Mission Critical Solution
Center (GMCSC) or Development in a shorter time than it would take to transfer a full
dump file. When a full dump file is not created, overall dumping elapsed time and
overall disk space used are also reduced. If it is determined that a useful extracted
dump file cannot be created, no error is reported and only a full dump file is created
instead.
The RCVDUMP HELP output summarizes when a full dump file or an extracted dump
file or both are created.