NonStop NS-Series Operations Guide (H06.12+)

Before You Begin
• You must have a second processor connected to a terminal or workstation with a running
command interpreter. The processor in which the TACL command interpreter is running
performs the dump.
• If dumpfile already exists, it must be empty. (Its end-of-file pointer, or EOF, must be zero.)
• You must not prime or reset the processor before performing a processor dump.
To prepare for a disk dump:
1. Verify that a disk is available with enough space to store the dump.
A processor dump requires 256 extents. Each extent should equal slightly more than 1/256
the size of the processor memory. For example, for a processor with 256 megabytes of main
memory, you need 256 extents of at least 512 pages each.
2. To empty an existing dumpfile:
> FUP PURGEDATA dumpfile
A processor dump can be made to one, two, or three files, with file names ending with an A, B,
or C to designate which Blade Element the processor element was dumped from.
Using RCVDUMP to Dump a Processor to Disk
The RCVDUMP command has several new parameters for Integrity NonStop systems. See “Dumping a
Processor to Disk” (page 116) for how they might be used for some possible dump scenarios.
The parallel parameter enables you to dump and reload individual physical processors without
affecting the continuing operation of the other processor elements in that logical processor
grouping.
To dump a processor to disk on a running system:
1. Log on to a TACL session as the super ID (255,255).
2. At a TACL prompt, run the RCVDUMP utility, choosing the parameters and options
appropriate for your scenario:
RCVDUMP filename, cpuNum [, BLADE bladeId]
[, START startAddress][, END endAddress]
[, ONLINE | PARALLEL]
filename is the name of the disk file to which the dump is to be written.
cpuNum is the number of the logical processor from which a processor element
is to be dumped. Specify cpuNum as an integer in the range from 0
through 15.
BLADE bladeId is the identification of the Blade Element from which the processor
element is to be dumped. Valid values are A or B or C or ALL. Note
that ALL may not be used with the parallel method of dumping.
START n... is the byte address where the dump will start. The default value is 0.
END n... is the byte address where the dump will stop. Using a value of -1 is
the same as specifying the end of memory. The default value is -1.
ONLINE If this option is specified, a dump can be taken of a processor while it
is running. You may use either PARALLEL or ONLINE but not both.
PARALLEL If this option is specified, a dump may be taken of a single processor
element while the other PEs in that logical processor are reloaded and
continue normal operations. You may use either PARALLEL or ONLINE
but not both.
For more information, see the HP NonStop TACL Reference Manual.
Recovery Operations for Processors 117