Sun Microsystems Sun Fire V20z - Manual (Page 23)

Chapter 1 Introduction to the Sun Fire V20z Server 1-13
1.7 Integrated Mirroring
With traditional mirroring (or RAID1), a drive has its data duplicated on two
different drives using either a hardware RAID controller or software (generally by
means of the operating system). If either drive fails, the other continues to function
as a single drive until the failed drive is replaced.
With integrated mirroring enhanced (IME) (also referred to as either Enhanced
RAID1 or RAID1E), instead of only being able to use only two drives, you can use
two to six drives, including the option of only using an odd number of drives.
Instead of mirroring at the disk level, the data is mirrored in stripes across the
drives. Thus, IME allows for more flexibility with mirroring data.
Not all operating systems support RAID on the Sun Fire V20z server at this time.
Refer to the Sun Fire V20z Server Release Notes,
817-5252-xx , for information on which
operating systems do not yet support the Sun Fire V20z RAID capabilities.