Dot Hill Systems II 200 FC service manual Field-Replaceable Units, RAID I/O Controller Modules

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:

■Redundant components

■Notification of failed components

■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.

1.2Field-Replaceable Units

This section describes the field replaceable units (FRUs) contained in the SANnet II 200 FC, SATA, and SATA SE arrays.

1.2.1RAID I/O Controller Modules

Adual-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.

■SANnet II 200 FC array RAID controller modules provide six Fibre Channel ports.

■SANnet II 200 SATA array I/O controller modules provide eight Fibre Channel ports.

■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-

1-8SANnet II 200 FC, SATA, and SATA SE Array Installation, Operation, and Service Manual • March 2005