[conspire] 3rd Master Hard Disk Error

[paulz at ieee.org]

During POST and before GRUB, one of my computers gives the error message
    3rd Master Hard Disk Error
and says press F1 to continue.
Well this PC has 3 hard drives.  Which one is it?   Doing a web-search I find "information" in 2 categories:

* Access the BIOS to turn off the test.
* Replace "the hard drive".

At first I thought "3rd" meant a specific drive like /dev/hdc.   Apparently computers with only 1 drive generate the same message.

I have taken the precaution to make copies of important data on different physical drives.

What next?
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