Benefits of device parity protection
RAID 5
- Lost data is automatically reconstructed by the IOA after a disk failure.
- The system continues to run after a single disk failure.
- A failed disk unit can be replaced without stopping the system.
- Device parity protection reduces the potential number of
objects that could be damaged when a disk fails.
- Only one disk unit of capacity stores parity data in a parity
set.
RAID 6
- Lost data is automatically reconstructed by the IOA after
a disk failure.
- The system continues to run after two disks fail.
- Two failed disk units can be replaced without stopping the
system.
- Device parity protection reduces the potential number of
objects that could be damaged when a disk fails.
- Two disk units of capacity are dedicated to storing parity
data in a parity set.