Recovering from Windows software RAID failure
Array health states
RAID volumes can be in one of four states:
Healthy - the default. Everything is A-OK.
Rebuild - the system is rebuilding the array, and is thus at risk of data loss until the array has completely rebuilt. This will occur when the array is initially built, and while recovering from a failure.
Failed RAID - redundancy has failed, but the array is recoverable. You will need to replace the failed disk, or reactivate a disk with errors, to rebuild the array.
Failed - the array has failed. No rebuilding is possible and you have lost all data on the array. Replace the failed hardware and recover the data from backups.
