Raid Concept; Raid Set; Volume Set - Areca ARC-1110 User Manual

Internal PCI-Express RAID Card Comparison (ARC-12XX)
RAID processor
Host Bus Type
RAID 6 support
Cache Memory
Drive Support
Disk Connector

1.3 RAID Concept

1.3.1 RAID Set

A RAID Set is a group of disks connected to a RAID controller. A
RAID Set contains one or more Volume Sets. The RAID Set itself
does not define the RAID level (0, 1, 1E, 3, 5, 6, etc); the RAID
level is defined within each Volume Set. So, Volume Sets are con-
tained within RAID Sets and the RAID Level is defined within the
Volume Set. If physical disks of different capacities are grouped
together in a RAID Set, then the capacity of the smallest disk will
become the effective capacity of all the disks in the RAID Set.

1.3.2 Volume Set

Each Volume Set is seen by the host system as a single logical
device (in other words, a single large virtual hard disk). A Volume
Set will use a specific RAID level, which will require one or more
physical disks (depending on the RAID level used). RAID level
refers to the level of performance and data protection of a Volume
Set. The capacity of a Volume Set can consume all or a portion
of the available disk capacity in a RAID Set. Multiple Volume Sets
can exist in a Raid Set.
For the SATA RAID controller, a volume set must be created either
on an existing RAID Set or on a group of available individual disks
(disks that are about to become part of a raid set). If there are
pre-existing RAID Sets with available capacity and enough disks
1230ML
YES
One DDR2 DIMM (Default 256MB, Upgrade to 2GB)
12 * SATA ll
3*Min SAS 4i 4*Min SAS 4i
INTRODUCTION
1260ML
IOP341
PCI-Express X8
YES
16 * SATA ll 24 * SATA ll
6*Min SAS 4i
1280ML
YES
24 * SATA ll
24*SATA
1280
YES
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