Volume Relationships; Fibre Channel Concepts - Overland Storage SnapSAN S1000 User Manual

SnapSAN S1000 User Guide
Type
RAID 10
RAID 30
RAID 50
RAID 60
JBOD

Volume Relationships

The following graphic describes the relationship of RAID components. One RAID Group
consists of a set of virtual disks and owns one RAID level attribute. Each RAID Group can be
divided into several virtual disks. The virtual disks in one group share the same RAID level,
but may have different volume capacities. All virtual disks share the Cache Volume (CV) to
execute the data transaction. Logical Unit Number (LUN) is a unique identifier, in which
users can access through SCSI commands.

Fibre Channel Concepts

Fibre Channel is a gigabit-speed network technology which transports SCSI commands over
Fibre Channel networks. Fibre Channel was primarily concerned with simplifying the
connections and increasing distances, but later designers added the goals of connecting SCSI
disk storage, providing higher speeds and far greater numbers of connected devices.
The SnapSAN S1000 Fibre Channel controller only supports loop networks. It does not work
with Fabric networks.
A Fibre Channel Arbitrated Loop (FC-AL) is a Fibre Channel network in which up to 126
systems and devices are connected in a loop topology, with each transmitter connecting to
the receiver of the device on its logical right. The Fibre Channel Arbitrated Loop protocol
used for transmission is different from Fibre Channel switched and point-to-point protocols.
Multiple FC-AL loops can be connected via a fabric switch to extend the network.
10400310-003 01/2013
Description
Disk striping of a RAID 1 group.
Disk striping of a RAID 3 group.
Disk striping of a RAID 5 group.
Disk striping of a RAID 6 group.
Independently address a drive.
©2010-13 Overland Storage, Inc.
Fibre Channel Concepts
Min. No. of Drives
At least four
At least six
At least six
At least eight
At least one
1-7
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