HP Application Recovery Manager software A.06.10 Concepts guide (March 2008)

2 Replication techniques
Disk array basics
The replication techniques available depend on the type of disk array and the
firmware/software installed.
Disk arrays support disk virtualization techniques, which enable the creation of virtual
disks, logical volumes, and so on.
An array of physical disks is configured in such a way that it appears as one large
block of data storage. This can then be divided into a number of virtual storage
blocks, which are presented to the host/operating system.
These blocks can have different names, but basically the techniques for their production
are similar and, for simplicity, in this manual, are considered as storage volumes.
RAID technology
Disk arrays use RAID technology which is applied to the available storage by the
RAID system, to provide data redundancy and improved data protection.
Concepts guide 21