Repairing a Mirrored System Volume to Enable Boot
The failure of a mirrored drive may prevent your system from booting. Typically, this happens when you're mirroring the system or boot volume, or both, and the primary mirror drive has failed. To correct this problem, you need to replace the failed drive and then use an emergency boot disk for the system or a similarly configured system to enable system boot. This should not be confused with the emergency repair disk, which is mainly used to fix registry corruption. Creating an emergency boot disk is covered in Chapter 14.
Editing BOOT.INI for the Mirror
Once you have an emergency boot disk, you need to edit the BOOT.INI file it contains so that the operating system loads from the secondary mirror. This file contains entries that look like this:
[boot loader] timeout=30 default=multi(0)disk(0)rdisk(0)volume(2)\WIN2000
[operating systems]multi(0)disk(0)rdisk(0)volume(2)\WIN2000="Windows 2000Server"
If the secondary mirror drive was on drive 2, you could update the BOOT.INI file shown earlier as follows:
[boot loader] timeout=30 default=multi(0)disk(0)rdisk(1)volume(2)\WIN2000
[operating systems]multi(0)disk(0)rdisk(1)volume(2)\WIN2000=""Windows 2000Server"
Note: For a more detailed explanation of BOOT.INI, see the section of Chapter 10 entitled "Updating the Boot Disk."
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