This Intel web page describes how Intel RST verifies and repairs RAID volumes:
http://www.intel.com/support/chipsets/imsm/sb/CS-023081.htm
It says that for RAID 1 and 10, RST does the following:
"Data on the mirror is compared to data on the source. If the data on the mirror does not match the data on the source, the data on the mirror is overwritten with the data on the source."
It says that for RAID 5, RST does the following:
"Parity is recalculated and compared to the stored parity for that stripe. If the newly calculated parity does not match the stored parity, the stored parity is overwritten with the newly calculated parity."
My questions are:
1) For RAID 1 and RAID 10, what if it's the source that contains corrupted data - will it really copy that corrupted data onto the mirror, causing the correct data to be lost?
2) For RAID 5, what if corrupted data was used to recalculate the parity - will it really overwrite the old correct parity with the new incorrect parity?