NEC Express5800 Series Installation Manual page 21

Chapter 1 Installing Windows
System partition size
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Specify a drive other than the system drive for "Dedicated Dump File".
Create the registry shown below by using the Registry Editor and specify the name of
Dedicated Dump File.
<For example: "dedicateddumpfile.sys" in drive D>
Key : HKEY_LOCAL_MACHINE\SYSTEM
\CurrentControlSet\Control\CrashControl
Name : DedicatedDumpFile
Type : REG_SZ
Data : D:\dedicateddumpfile.sys
Note the following when specifying Dedicated Dump File:

The setting is applied after restarting the system.

Specify a drive that has free space of "installed memory size + 400 MB"
("installed memory size + 1,800 MB" when the installed memory size is 4TB or
more) or more.

Dedicated Dump File cannot be placed in dynamic volumes.

Dedicated Dump File is only used for collecting memory dump, and is not used
as memory. Specify the paging file size so that sufficient virtual memory can be
allocated in the entire system.
The system partition size can be calculated by using the following formula.
Size required to install the OS + paging file size + dump file size + application size
Desktop Experience
Size required to install the OS
Paging file size (recommended)
Dump file size
Application size
Server Core
Size required to install the OS
Paging file size (recommended)
Dump file size
Application size
For example, if the installed memory size is 8 GB (8,192 MB), and application size is 100 MB,
the partition size is calculated as follows:
15,900MB + (8,192MB + 400MB) + 8,192MB + 400MB + 100MB
= 33,184MB
Installation Guide (Windows Server 2022)
3. Installing Windows Server 2022
= 15,900 MB
= installed memory size + 400MB
= installed memory size + 400MB
(installed memory size is 4 TB or less)
= installed memory size + 1,800MB
(installed memory size is exceeding 4 TB)
= as required by the application
= 10,700MB
= installed memory size + 400MB
= installed memory size + 400MB
(installed memory size is 4 TB or less)
= installed memory size + 1,800MB
(installed memory size is exceeding 4 TB)
= as required by the application
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