User manual

INTRODUCTION

of disk capacity available in a RAID Set. Multiple Volume Sets can

exist on a group of disks in a Raid Set.

In the illustration below, Volume 1 can be assigned a RAID 5 level

of operation while Volume 0 might be assigned a RAID (10) level

of operation.

1.3.3 Easy of Use Features

1.3.3.1 Instant Availability/Background Initializa-

tion

RAID 0 and RAID 1 volume set can be used immediately after the

creation. But the RAID 3 and 5 volume sets must be initialized to

generate the parity. In the Normal Initialization, the initialization

proceeds as a background task, the volume set is fully accessible

for system reads and writes. The operating system can instantly

access to the newly created arrays without requiring a reboot and

waiting the initialization complete. Furthermore, the RAID volume

set is also protected against a single disk failure while initialing.

In Fast Initialization, the initialization proceeds must be complet-

ed before the volume set ready for system accesses.

1.3.3.2 Array Roaming

The SATA RAID controller stores conﬁguration information both in

NVRAM and on the disk drives It can protect the conﬁguration set-

tings in the case of a disk drive or controller failure. Array roam-

ing allows the administrators the ability to move a completely raid

set to another system without losing RAID conﬁguration and data

on that raid set. If a server fails to work, the raid set disk drives

can be moved to another server and inserted in any order.