![Dot Hill Systems SANnet II 200 Скачать руководство пользователя страница 17](http://html1.mh-extra.com/html/dot-hill-systems/sannet-ii-200/sannet-ii-200_installation-operation-and-service-manual_2524262017.webp)
Chapter 1 Product and Architecture Overview
1-5
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 Appendix A.
1.5
Field-Replaceable Units (FRUs)
This section describes the FRUs contained in the SANnet II 200 SCSI array.
1.5.1
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.
SANnet II 200 SCSI array I/O controller modules are hot-serviceable. SANnet II 200
SCSI array RAID controller modules provide four SCSI ports. Single-controller and
dual-controller models are available. Each RAID controller is configured with 1
gigabyte (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 gigabyte of Synchronous
Dynamic Random Access Memory (SDRAM) with Error Control Check (ECC)
memory. In addition, each controller supports 64 megabytes (Mbyte) of on-board
memory. One Application Specific Integrated Circuit (ASIC) controller chip handles
the interconnection between the controller bus, DRAM memory, and Peripheral
Component Interconnect (PCI) internal buses. It also handles the interface between the
on-board 2-Mbyte flash, 32-Kbyte nonvolatile random access memory (NVRAM) RS-
232 port chip, and 10/100 BASE-T Ethernet chip.
The RAID I/O controller module is a multifunction board. I/O controller modules
include the SCSI Accessed Fault-Tolerant Enclosure (SAF-TE) logic and the RAID
controller. The SAF-TE logic monitors various temperature thresholds, fan speed from
each fan, voltage status from each power supply, and the FRU ID.
Each RAID I/O controller module incorporates the SAF-TE direct-attached capability
to monitor and maintain enclosure environmental information. The SAF-TE controller
chip monitors all in12 and +5 voltages, various temperature sensors located
throughout the chassis, and each fan. The SAF-TE also controls the front-panel and
back-panel LEDs and the audible alarm. Both the RAID chassis and the expansion
chassis support dual SAF-TE failover capabilities for fully redundant event
monitoring.
Содержание SANnet II 200
Страница 1: ...SANnet II 200 SCSI Array Installation Operation and Service Manual June 2005 83 00002359 Revision C...
Страница 32: ...3 4 SANnet II 200 SCSI Array Installation Operation and Service Manual June 2005...
Страница 64: ...4 32 SANnet II 200 SCSI Array Installation Operation and Service Manual June 2005...
Страница 74: ...5 10 SANnet II 200 SCSI Array Installation Operation and Service Manual June 2005...
Страница 106: ...7 22 SANnet II 200 SCSI Array Installation Operation and Service Manual June 2005...
Страница 130: ...B 20 SANnet II 200 SCSI Array Installation Operation and Service Manual June 2005...
Страница 146: ...E 10 SANnet II 200 SCSI Array Installation Operation and Service Manual June 2005...
Страница 154: ...F 8 SANnet II 200 SCSI Array Installation Operation and Service Manual June 2005...
Страница 160: ...G 6 SANnet II 200 SCSI Array Installation Operation and Service Manual June 2005...
Страница 178: ...I 10 SANnet II 200 SCSI Array Installation Operation and Service Manual June 2005...
Страница 180: ...J 2 SANnet II 200 SCSI Array Installation Operation and Service Manual June 2005...
Страница 186: ...6 SANnet II 200 SCSI Array Installation Operation and Service Manual June 2005...