What is enclosure loss protection?

When you create using the feature, all of the disk drives in the array are found in different expansion drawers. Enclosure loss protection provides more data protection if access to the enclosure is lost. This feature is used by default when you choose the automatic configuration option.

Enclosure loss protection depends on the number of enclosures that are available and the value set for the level. Configuring your arrays to have enclosure loss protection is recommended. If your configuration supports the minimum number of expansion drawers for your RAID level, create your arrays to have enclosure loss protection.

RAID Level Criteria for Enclosure Loss Protection
RAID Level 0 No enclosure loss protection (RAID Level 0 does not provide redundancy).
RAID Level 1 or RAID Level 10 For RAID Level 1, the array must use a minimum of two disk drives found in separate enclosures. For RAID Level 10, the array must use a minimum of four disk drives found in separate enclosures.
RAID Level 3 The array must use a minimum of three disk drives found in separate enclosures.
RAID Level 5 The array must use a minimum of three disk drives found in separate enclosures.
RAID Level 6 The array must use a minimum of five disk drives, with a maximum of two disk drives in any enclosure.