Dot Hill Systems II 200 FC - Manual (Page 28)

1-8 SANnet II 200 FC, SATA, and SATA SE Array Installation, Operation, and Service Manual • March 2005
in a JBOD array. For example, “SANnet II 200 D1000” identifies a JBOD array with
SES firmware version 1000 and “SANnet II 200F A1000” identifies a SANnet II 200
FC RAID array with firmware version 1000.
For a list of supported racks and cabinets, refer to the SANnet II Family Rack
Installation Guide for 2U Arrays.
Reliability, availability, and serviceability (RAS) are supported by:
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Redundant components
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Notification of failed components
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Components that are replaceable while the unit is online
For information about specifications and agency approvals, see “SANnet II 200 FC,
SATA, and SATA SE Array Specifications” on page A-1.
1.2 Field-Replaceable Units
This section describes the field replaceable units (FRUs) contained in the SANnet II
200 FC, SATA, and SATA SE arrays.
1.2.1 RAID I/O Controller Modules
A dual-controller configuration offers increased reliability and availability because it
eliminates a single point of failure, the controller. In a dual-controller configuration, if
the primary controller fails, the array automatically fails over to the second controller
without an interruption of data flow.
The FC, SATA, and SATA SE array I/O controller modules are hot-serviceable. Hot-
serviceable means that the module can be replaced while the array and hosts are
powered on, but the connected hosts must be inactive.
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SANnet II 200 FC array RAID controller modules provide six Fibre Channel ports.
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SANnet II 200 SATA array I/O controller modules provide eight Fibre Channel
ports.
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SANnet II 200 SATA SE array I/O controller modules provide six Fibre Channel
ports.
Single- and dual-controller models are available, with the dual-controller version
supporting active/passive and active/active configurations. Each RAID controller is
configured with 1 Gbyte of cache.
In the unlikely event of an I/O controller module failure, the redundant RAID
controller immediately begins servicing all I/O requests. The failure does not affect
application programs.
Each RAID I/O controller module can support up to 1 Gbyte of Synchronous Dynamic
Random Access Memory (SDRAM) with Error Control Check (ECC) memory. In
addition, each controller supports 64 Mbyte of on-board memory. Two Application-