Single-Controller Models; Dual Redundant Model - Rorke Data Galaxy 16i User Manual

NOTE:
Please check to see that you have the correct model. If you have a
different model to the one you have ordered, please contact your
sales representative immediately.

1.1.1 Single-Controller Models

The single controller Galaxy 16i subsystems, the Galaxy 16i
GAL16IR-U3DS and the Galaxy 16i GAL16IR-FC2S, combine
either 2Gbps Fibre Channel (FC) or SCSI-160 host channels with
16 SATA drives in a single storage subsystem. These models are
ideal for applications that require greater performance than data
availability, and when full redundancy is not a critical
requirement.

1.1.2 Dual Redundant Model

The dual redundant controller Galaxy 16i subsystem (Galaxy 16i
GAL16IR-FC2D) combines two, dual redundant, 2Gbps FC
controllers with 16 SATA drives in the Galaxy 16i subsystem.
When equipped with dual-redundant controllers, the subsystem is
capable of full redundancy and is able to sustain single failure of
any of its active components.
transparent to host computers and the failover process is
automatically managed by firmware.
The redundant model operates in a Dual-Active RAID controller
configuration. The two controllers work together to enhance the
overall performance of the subsystem.
supported and the data cached in memory is protected by a battery
module (BBU) that is able to sustain cache memory for up to 72
hours. An exact replica of the unfinished writes by hosts is
constantly cached in both controllers. This ensures that there is no
single point of failure when one controller fails. Users can freely
associate logical arrays with multiple target IDs.
1-2
RAID controller failure is
Cache coherency is
Galaxy 16i User's Manual