System Debug Reference Manual (32650-90888)

518 Chapter12
Dump Analysis Tool (DAT)
Operating DAT
3. Create the dump. A request will appear on the system console to mount the dump tape.
The following example creates the dump EXAMP.
$nmdat>GETDUMP examp
Please mount dump volume #1.
4. Mount the dump tape when prompted by the message on the system console. Press
RETURN. As the dump is being loaded, DAT will display a series of messages about the
dump indicating GETDUMP progress:
Tape created by SOFTDUMP 99999X A.00.00
MPE-XL B.05.09 dumped on SAT, OCT 20, 1990, 1:44 AM
Dump Tape Contents
------------------
PIM00 4.0 Kbytes
MEMDUMP 32.0 Mbytes
VM001 59.5 Mbytes
This dump will require approximately 32.1 Mbytes (#131387
sectors) of disc
space.
Please stand by for disc space allocation.
0 100%
Loading tape file PIM00 : +....+....+
Loading tape file MEMDUMP : +....+....+
Loading tape file VM001 : +....+....+
Please stand by while dump pages are posted to disk.
Dump disc file space reduced by 59% due to LZ data compression.
$nmdat>
5. Open the dump. The following example opens the dump EXAMP.
$nmdat>OPENDUMP examp
Dump Title: System failure during performance testing.
Last PIN : 7 On ICS stack -- Dispatcher running
$nmdat>
6. Analyze the dump, using the commands and DAT macros described later in this
chapter. If the dump file set was opened successfully, you can display the machine
registers, any data locations (using physical, secondary and virtual addressing modes),
and the basic tables used in the virtual address translation process.
7. When finished with a dump file set, you can exit the utility or open another file set. All
dump file sets remain in the system until you explicitly purge them with the