Raid
Raid
RAID is an acronym for Redundant Array of Indexed Disks. It uses multiple hard disks storing the same data to protect against some degree of physical disk failure. The amount of protection it affords depends upon the type of raid used.
Software Raid
Installation
In Breezy Badger (5.10), installation can be completed entirely with the installation CD without using expert mode.
["Installation/LVMOnRaid"] ["Installation/RAID1"]
FakeRaid
Access
Device mapper raid can be used to access many of these volumes. It is provided by the dmraid package. dmraid is in the Universe repository.
After installing dmraid you can run the command <code>dmraid -r</code> to list the devices and raid volumes on your system. dmraid makes a device file for each volume and partition; these can be found in the /dev/mapper/ directory, and can be mounted and otherwise manipulated like normal block devices.
Installation
It is not advisable to install Ubuntu onto disks managed by a fake raid system; it is extremely difficult and the results will be disappointing compared to linux's md software raid system. If you really must do it to install Ubuntu on the same raid drive as an existing installation of another operating system see the following:
More Information
Hardware Raid
Real hardware raid systems are very rare, and are almost always provided by a card such as a PCI card.
Links
http://www.linuxmafia.com/faq/Hardware/sata.html