Hardware manual

Group Administration Storage solutions for all enterprises
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By default, a group provides a single pool of storage. If you have multiple members, you can divide group space
into different storage pools and then assign members. Pools help you organize storage according to usage and give
you a way to allocate resources, from a single-system management view.
You create volumes to a
ccess storage space in a pool, and you can modify volume size and attributes on-demand.
Cloning a volume enables you to make an exact copy of the volume.
Figure 1-1 shows a three-member group (three network connections on each member), with me
mbers and volumes
distributed across two pools, and two servers, with iSCSI initiators accessing the volumes.
Figure 1-1: Three-Member, Two Pool PS Series Group
High-end features in an affordable iSCSI san
To meet the storage requirements of businesses today, a PS Series group offers advanced storage capabilities in a
highly-available, cost-effective iSCSI SAN.
Modular hardware
A PS Series group can easily adjust to workload requirements; therefore, administrators purchase hardware only
when necessary. New product versions fully operate with previous arrays.
Depending on the model, a PS Series storage array provides t
he following features:
• Redundant hardware for no single point of failure. Redundant, hot-sw
appable hardware
components—disks, control modules, fans, and power supplies—offer the highest availability. Component
failover and disk sparing occur automatically without user intervention or disrupting data availability. In
addition, data in each array is kept safe by RAID technology.
• High-per
formance
control modules. Each control module has multiple Gigabit Ethernet interfaces. You can
configure multiple network interfaces for automatic failover. With dual control modules, the array mirrors data
between battery-backed write-back caches. If one control module fails, the other control module starts
operating—automatically and with no disruption to users.