Areca ARC-1110 Computer Hardware User Manual


 
INTRODUCTION
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In the illustration, volume 1 can be assigned a RAID level 5 of
operation while volume 0 might be assigned a RAID level 1E of
operation. Alterantively, the free space can be used to create vol-
ume 2, which could then be set to use RAID level 5.
1.3.3 Ease of Use Features
1.3.3.1 Foreground Availability/Background Initial-
ization
RAID 0 and RAID 1 volume sets can be used immediately af-
ter creation because they do not create parity data. However,
RAID 3, 5 and 6 volume sets must be initialized to generate
parity information. In Backgorund Initialization, the initializa-
tion proceeds as a background task, and the volume set is fully
accessible for system reads and writes. The operating system
can instantly access the newly created arrays without requir-
ing a reboot and without waiting for initialization to complete.
Furthermore, the volume set is protected against disk failures
while initialing. If using Foreground Initialization, the initializa-
tion process must be completed before the volume set is ready
for system accesses.
1.3.3.2 Array Roaming
The SATA RAID controllers store RAID conguration information
on the disk drives. The controller therefore protect the congu-
ration settings in the event of controller failure. Array roaming
allows the administrators the ability to move a completele RAID
set to another system without losing RAID conguration infor-