Hitachi HF-W2000 50, Instruction Manual

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8. MAINTENANCE OPERATIONS
8-6
8.2 Collecting Memory Dumps
When one of the errors in Table 8-2 occurs, this equipment records the contents of the system memory in a file (a
memory dump file). A blue screen then appears. By analyzing the data in the memory dump file, you can investigate
the cause of the failure.
Table 8-2 Errors that trigger memory dumps
Cause Description
Forced recovery from the
OS hanging When the OS hangs, press the NMI switch or input a remote reset signal to the external
contact RMTRESET
#1
. This causes the collection of the memory dump.
Hardware NMI When a serious failure (such as an uncorrectable memory error or a PIC bus parity check
error) occurs in the equipment hardware, a non- maskable interrupt (NMI) is generated,
and a memory dump is collected.
Windows
®
bug check When a fatal error occurs in the Windows
®
kernel, a memory dump is collected.
#1: Do not input a remote reset signal continuously to the external contact RMTRESET.
Doing so prevents this equipment from collecting a memory dump.
To select the memory dump file type, from the Control Panel, open System. You can select from the following five
types of memory dump file defined below. Because the memory dump file type determines the extent to which you
can analyze failures by using the dump file, we recommend selecting Complete memory dump whenever possible.
The factory default setting is Complete memory dump.
• Complete memory dump: The entire contents of the system memory are recorded. The boot volume
#2
must have
enough free space to hold a paging file equal to the size of the physical memory plus 1 MB.
• Kernel memory dump: The kernel memory is recorded. The boot volume
#2
must have a paging file that is at
least the size of the kernel memory.
•
Minimum memory dump: The minimum information necessary to identify what caused the equipment to stop is
recorded. The boot volume
#2
must have enough free space to hold a paging file greater than 2 MB in size.
• Automatic memory dump: Similarly to the kernel memory dump, the kernel memory is recorded. The
difference from the kernel memory dump is that the automatic memory dump can create an initial paging file that
is smaller than the physical memory size.
• Active memory dump: The contents of the memory assigned to virtual machines are filtered, and only the
contents of the memory used in Hyper-V hosts are recorded. Active memory dumps can record memory dump
files that are smaller than with a complete memory dump.
#2: The boot volume is a volume that contains the Windows
®
files and Windows
®
support files.
To collect a complete memory dump file, you need a memory dump file of a size comparable to the capacity of
the physical memory. In addition, the virtual memory (page file) and memory dump settings must be the ones
that are recommended for this equipment
#3
.