If a Volume is Degraded
A degraded volume is either not providing full performance or has lost its ability to
guarantee data protection. All data on a degraded volume is available, but data will be
lost if a disk fails. A volume’s status is listed as degraded:
Â While the volume is being created. This is normal, and the volume’s status changes
from degraded to good as soon as initialization is finished.
Â When a disk fails in the RAID 1, RAID 5, or RAID 0+1 set that the volume is based on.
The volume remains in a degraded state until you replace the faulty drive or until an
available spare is integrated into the RAID set.
Â While the RAID set that the volume is based on is recovering from a loss of data
redundancy. The volume’s status changes from degraded to good as soon as the
recovery process in finished.