RAID 1E types

There are several types of RAID 1E: RAID 1E near, RAID 1E interleaved and RAID 1E far. Usually, RAID 1E type is not specified in a controller documentation. Any type of RAID 1E can survive a failure of one member disk or any number of nonadjacent disks (more info on RAID 1E failures). Let's consider each RAID 1E type in details.

RAID 1E near

RAID 1E near can be created only using odd number of disks. If a number of disks is even, RAID 1E near turns into RAID 10. It is possible to create RAID 1E near using md-raid (Linux).

RAID 1E near

RAID 1E interleaved

RAID 1E interleaved can be created by a controller, e.g. IBM or Promise. This RAID 1E type can be implemented using either even or odd number of member disks.

RAID 1E near

RAID 1E far

This RAID 1E type can be created using any number of disks. In fact RAID 1E far is the same as RAID 10 far. As of now, ReclaiMe Free RAID Recovery cannot automatically recover configuration for RAID 1E far. To recover such RAID you should use host protected area (HPA) to cut a half of member disks and then recover RAID 0.

RAID 1E near