Memory dump setup
To configure Windows to produce a memory dump, see
http://support.microsoft.com/kb/254649
The configuration process includes specifying the name and location for the dump file, as well as the type
of the dump. The type should be a kernel memory dump, although the larger complete memory dump is
acceptable. Do not select the small memory dump. If a bug check occurs, then after a reboot the file can
be retrieved and sent for diagnosis.
Driver debug dump setup
Generating a driver debug dump log file requires installing checked drivers and the DebugView
application. This is an advanced technique. For instructions, see
Preparing to generate Windows driver
Bug checks
Following a bug check, restart the system and retrieve the kernel dump for transmission to Hewlett
Packard Enterprise. If driver debug dumps were enabled, retrieve the driver debug log file for
transmission to Hewlett Packard Enterprise.
Hangs
If the system hangs, the system can be configured to allow forcing a system crash from the keyboard.
This is explained in
http://msdn.microsoft.com/en-us/library/ff545499(v=VS.85).aspx
If the system hangs after configuring, force the crash and reboot. Retrieve the kernel dump for
transmission to Hewlett Packard Enterprise.
Linux logs and troubleshooting tools
Dumping cached reservation information
The Linux advanced path failover driver tracks reservation information for tape libraries to enable
rebuilding the reservations if a failure requires changing the drive that is hosting the library control path.
These commands dump the reservation information cache buffers to the
/var/log/messages
file and
the console.
Procedure
1.
To dump legacy reservations:
echo legacy > /sys/class/pfo/pfo4/ctrl
2.
To dump persistent reservations:
echo persistent > /sys/class/pfo/pfo4/ctrl
3.
To dump prevent allow medium removal conditions:
echo prevent > /sys/class/pfo/pfo4/ctrl
Controlling the level of debug output sent to the console
This procedure controls the level of debug messages being sent to the console.
The default output level is
minimum
.
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Memory dump setup
