Windows Knowledge Base

[DMX]How to backup VCM Database and review the database?

The symmaskdb command performs control and monitor operations concerning the device
masking database (VCMDB).  You can backs up the device masking database to a file on the host previously created by the init argument.

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[Hardware Ref] BIOS Beep Codes

I use these codes to trouble shoot hardware issues for years. Hope that will be useful to you.

When a computer is first turned on, or rebooted, its BIOS performs a power-on self test (POST) to test the system's hardware, checking to make sure that all of the system's hardware components are working properly. Under normal circumstances, the POST will display an error message; however, if the BIOS detects an error before it can access the video card, or if there is a problem with the video card, it will produce a series of beeps, and the pattern of the beeps indicates what kind of problem the BIOS has detected.
Because there are many brands of BIOS, there are no standard beep codes for every BIOS.

The two most-used brands are AMI (American Megatrends International) and Phoenix.

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