Data may still be recovered using our RAID recovery service. See "Chapter 20: RAID Recovery Services."

RAID Controller Failure

A hardware RAID controller may fail. When the bad controller is replaced by a new controller, the original RAID configuration is usually lost. Other events causing further complication include the following:

• A different model of RAID controller is used.
• The RAID is inadvertently reinitialized.
• The disks are connected to the new controller in a different order.

System Update

A software RAID may be lost during an upgrade of Windows.

Incorrect RAID Level

Sometimes a RAID intended to be level 5 was erroneously configured as a RAID 0. When one disk fails and cannot be physically repaired, data is lost because there is no redundancy.