When a member of a RAID 5 volume fails, the operating system directs the reading and writing all of new data to the remaining members of the volume. A single member failure will not result in data loss, but reduces overall performance of a RAID 5 volume. Repairing a RAID 5 volume restores its performance by reconstructing the data of the failed member on another disk.

Here is a screenshot of a failed RAID 5 volume in Acronis Disk Director 11 Advanced Server and in Windows Disk Management:

Solution

To repair a RAID 5 column, make sure you have a new disk inserted instead of the failed one. The disk should be online and initialized:

1. Right-click on the failed RAID 5 volume and select Replace column:

   

2. Select the new disk and click OK:

   

3. Commit the operation:

   

More information

See also Dynamic Disk Types Support in Windows Editions.