HP Media Vault - Manual (Page 101)

Understanding disk mirrors and concatenated
disks
Mirroring
The type of
mirroring supported on the media vault is called Redundant Array of Independent Disks (RAID) RAID-
1.
In RAID-1 mirroring, an identical copy of data written to a volume on one hard disk is written to a volume on a
second hard disk. Mirroring volumes reduces your total hard disk storage capacity by half. The advantage is that
if one hard disk fails, you have a copy of your data on the second hard disk.
Disk Concatenation
Disk
concatenation (also called JBOD ) is another type of advanced storage configuration. This type of
configuration combines the available space from two or more hard disks into one large logical volume .