Mirrored drive recovery after MB failure

Situation:
The motherboard failed on a Windows 2000 Server computer with the boot volume mirrored. After replacing the motherboard and trying to boot the computer, I get the following …
STOP: 0x0000007B (0xF741F84C,0xC0000034,0x00000000,0x00000000) INACCESSIBLE_BOOT-DEVICE
How can I get this mirrored volume to boot normally without loosing data?