|
A physical disk group is configured with a certain level of protection against disk failures. This is called the Requested Protection Level and can be set to the following values:
When a physical disk group lacks storage space to provide the requested protection level, the actual protection level will be lower. SAN administrators will want to ensure the actual protection level matches their internal policy.
The ProtectionLevel parameter of the SEN_EVA_PHYSICALDISKGROUPS class represents the actual protection level (0 = None, 1 = Single, 2 = Double). This parameter will trigger a warning when the actual protection level is lower than the requested protection level. In case of a warning, SAN administrators will need to add disks to the physical disk group to restore the data protection level.
 | A VRAID0 virtual disk hosted on a physical disk group with a protection level set to None will lose all of its data upon a disk failure. |
| 
