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Summary of Contents for easyRAID Q12-U4R2
- Page 1 Q12 Hardware User Manual Ultra 320 SCSI to Serial ATA & Fibre Channel to Serial ATA Disk Array Systems Version 1.0...
- Page 2 Q12-U4R2 Ultra 320 SCSI to Serial ATA Disk Array System & easyRAID Q12-F2R2 Fibre Channel to Serial ATA Disk Array System Hardware User Manual...
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Page 4: Table Of Contents
Table of Contents Preface........................i Chapter 1 Overview Features ........................ 2 Understanding RAID ..................... 3 NRAID ......................3 Just a Bunch Of Disks ..................3 RAID Levels ..................... 3 Hot Spare Disks ....................6 RAID Combinations ..................6 Summary of RAID Levels ................. 7 System Requirements ................... -
Page 6: Preface
Preface About this Manual This manual is designed to make the disk array system as easy to use as possible. Information contained in this document has been checked for accuracy, but no guarantee is given that the con- tents are correct. Information and specifications are subject to change without notice. Conventions Caution This symbol is used to remind users to pay attention to important... - Page 7 ERQ12-U4R2 & ERQ12-F2R2 Serial ATA Disk Array Systems Important Safety Instructions, Care and Handling Before starting, take a few minutes to read this manual. Read all of these instructions and save this manual for later reference. Protect the disk array system from extremely high or low temperatures.
- Page 8 ERQ12-U4R2 & ERQ12-F2R2 Serial ATA Disk Array Systems The appliance must be grounded. The disk array system is equipped with a 3-wire grounded type of power cord. This power cord will only fit into a grounded type of power outlet. If an extension cord or a power center is used with the disk array system, make sure that the total current con- sumption of all products plugged into the wall outlet...
- Page 9 ERQ12-U4R2 & ERQ12-F2R2 Serial ATA Disk Array Systems Placement Notes • The disk array system LCD panel can be damaged by exposure to direct sunlight. Limit exposure to subdued or indirect sunlight only. • The disk array system should be used only in clean environments that are free from airborne contaminants such as dust, dirt, and smoke.
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Page 10: Chapter 1 Overview
1 Overview The disk array system uses groups of inex- pensive disks to provide flexibility when balancing data availability, access rate, and capacity management needs. High data availability is achieved by using the fault tolerance features of RAID (Redundant Array of Inexpensive Disks); hot spare disks with automatic on-line rebuild;... -
Page 11: Features
ERQ12-U4R2 & ERQ12-F2R2 Serial ATA Disk Array Systems Features The main features of the disk array system are listed as follows. Refer to the specifications table on page 31 for more detailed information. • Operating system independent • NRAID, JBOD, RAID 0, 1, 3, 5, 0+1, 30, or 50 array groups •... -
Page 12: Understanding Raid
ERQ12-U4R2 & ERQ12-F2R2 Serial ATA Disk Array Systems Understanding RAID Read this section to understand how to balance data availability, access rate, and capacity man- agement needs. NRAID NRAID (Non-RAID) is an array that concatenates the space of all hard disks linearly and forms a large, logical disk. - Page 13 ERQ12-U4R2 & ERQ12-F2R2 Serial ATA Disk Array Systems but makes availability lower, since there are more disks and failure of a single disk causes failure of the array. A RAID 0 array is unsuitable for data that can not easily be reproduced, or for data that must be available for critical system operation.
- Page 14 ERQ12-U4R2 & ERQ12-F2R2 Serial ATA Disk Array Systems RAID 3 In RAID 3, data is divided into pieces; the parity of these pieces is calculated; and the pieces are written to separate disks in parallel with the writing of the parity to a dedicated disk. This process is called striping with parity.
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Page 15: Hot Spare Disks
ERQ12-U4R2 & ERQ12-F2R2 Serial ATA Disk Array Systems RAID 5 In RAID 5, data is divided into pieces; the parity of these pieces is calculated; and the pieces and parity are written to separate disks in parallel. The parity is written to a different disk each time. Parity provides redundant information about the data on other disks. -
Page 16: Summary Of Raid Levels
ERQ12-U4R2 & ERQ12-F2R2 Serial ATA Disk Array Systems Summary of RAID Levels The following table summarizes the performance characteristics of each RAID level. A high availability or access rate number indicates high availability or quick access rate. Array Access Capacity Availability Description Group... -
Page 17: System Requirements
ERQ12-U4R2 & ERQ12-F2R2 Serial ATA Disk Array Systems System Requirements Ensure that the following requirements are met before installing the disk array system. Operating Environment • 15 cm (6-inches) of space around the disk array system for proper ventilation • ambient temperature of 5°C to 40°C (40°F to 104°F) •... -
Page 18: Host Interface
ERQ12-U4R2 & ERQ12-F2R2 Serial ATA Disk Array Systems Host Interface The disk array system has either dual SCSI interfaces or dual fibre channel interfaces. Refer to the following sections to understand host interface system requirements. Small Computer Systems Interface The SA-7230 has dual Ultra320 SCSI interfaces that are compatible with previous SCSI stan- dards. -
Page 20: Chapter 2 Basic Configuration
2 Basic Configuration This chapter describes disk array system connections and disk installation. Unpacking Contact your supplier if any of the following items are missing or damaged. Caution The disk array system is heavy. Be careful when lifting and moving it. Front Panel Keys Disk Array System HPD to HPD Ultra320 SCSI... -
Page 21: Components
ERQ12-U4R2 & ERQ12-F2R2 Serial ATA Disk Array Systems Components Closed Front Panel 5 6 7 Name Description Displays warning, operating, and configuration LCD panel information. Power-on indicator Indicates the disk array system power is on. Power supply fail indicator Indicates a failed power supply. Indicates data transfer between the disk array sys- Host computer access indicator tem and the host computer. -
Page 22: Open Front Panel
ERQ12-U4R2 & ERQ12-F2R2 Serial ATA Disk Array Systems Open Front Panel 10 11 12 Name Description 1-12 Disk trays 1 to 12 Removable hot swap disk trays. Front panel door Protects the disks and houses the LCD Panel. -
Page 23: Disk Tray
ERQ12-U4R2 & ERQ12-F2R2 Serial ATA Disk Array Systems Disk Tray Front Name Description Power/Error indicator LED Different colors indicate different disk states: • Blue – Disk access • Green – Disk online • Orange – Disk full • Red – No disk Access indicator LED Indicates that the disk is being accessed. -
Page 24: Erq12-U4R2 Rear View
ERQ12-U4R2 & ERQ12-F2R2 Serial ATA Disk Array Systems ERQ12-U4R2 Rear View Host Port 2 Host Port 1 Term MODEM Name Description Cooling fan 1 System cooling fan Host Port 2 Connects to the host server. (Primary SCSI channel) Host Port 1 Connects to the host server. -
Page 25: Erq12-F2R2 Rear View
ERQ12-U4R2 & ERQ12-F2R2 Serial ATA Disk Array Systems ERQ12-F2R2 Rear View Term MODEM Name Description Cooling fan 1 System cooling fan Port select switch Selects speed for host ports 1 and 2: • Up – 1 Gbps • Down – 2 Gbps Host Port 1 Connects to the host server. -
Page 26: Installing Disks
ERQ12-U4R2 & ERQ12-F2R2 Serial ATA Disk Array Systems Installing Disks This section describes how to install disks in the disk array system. Read “Understanding RAID” on page 3 to decide how many disks are required. 1 Unlock the front panel door, then pull it open. 2 Push the button (A) to release the disk tray handle. - Page 27 ERQ12-U4R2 & ERQ12-F2R2 Serial ATA Disk Array Systems 5 Slide the disk tray back into the empty slot (A), then slowly close the disk tray handle (B). 6 Repeat steps 2 to 5 until all of the required disks have been installed. 7 Push the front panel door closed, and lock it.
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Page 28: Making Connections
ERQ12-U4R2 & ERQ12-F2R2 Serial ATA Disk Array Systems Making Connections After the required number of disks have been installed, external connections to the disk array system must be made. This section describes how to make all of the necessary connections. Connecting the Host Interface The disk array system has either dual SCSI interfaces or dual fibre channel interfaces. - Page 29 ERQ12-U4R2 & ERQ12-F2R2 Serial ATA Disk Array Systems Fibre Channel Interface The ERQ12-F2R2 has dual 2 Gbit fibre channel interfaces. Each interface can be used with optical or copper transceivers and cables. Follow these instructions to make optical connections. 1 Insert fibre cable into the ERQ12-F2R2 host port 1 (primary fibre channel) at the rear of the disk array system.
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Page 30: Connecting A Network
ERQ12-U4R2 & ERQ12-F2R2 Serial ATA Disk Array Systems Connecting a network Connect the network cable to the RJ-45 port at the rear of the unit. -
Page 31: Connecting And Turning On The Power
ERQ12-U4R2 & ERQ12-F2R2 Serial ATA Disk Array Systems Connecting and Turning on the Power 1 Plug a power cable (A) to a power connector at the rear of the unit, then plug the second power supply cable into the second power connector (B). Note The system is equipped with auto switching power supplies that can run on 100 to 240 VAC. -
Page 32: Mounting In A Rack
ERQ12-U4R2 & ERQ12-F2R2 Serial ATA Disk Array Systems Mounting in a Rack When the disk array system is completely set up, it can be installed in a standard 19-inch rack. Follow the instructions in this section to install the disk array system in a rack. 1 Clip eight rack nuts supplied with your rack, into the rack, taking care that they corre- spond with the mounting points on the rails. -
Page 33: Installing The Rail Extenders
ERQ12-U4R2 & ERQ12-F2R2 Serial ATA Disk Array Systems Installing the Rail Extenders Follow these instructions to fit the rail extenders if required. 1 If required, bolt the rail extenders into place as shown using the small bolts provided. 2 Slide the disk array system into the rack and bolt it into place with the supplied fixing screws. -
Page 34: Chapter 3 Maintenance
3 Maintenance Replacing a Disk A disk failure is indicated when the Power/Error LED at the front of the drive tray turns red and the audible alert sounds. Note Turn off the audible alert by pressing the Up and Down function but- tons on the front panel twice simultaneously. -
Page 35: Replacing A Power Supply
ERQ12-U4R2 & ERQ12-F2R2 Serial ATA Disk Array Systems Replacing a Power Supply The disk array system is equipped with a Power Supply Fail Indicator LED at the front of the unit that turns red when one of the power supplies fails. The message “Power x failure” also appears on the LCD panel, where x refers to power supply 1, or 2, and an audible alert sounds. - Page 36 ERQ12-U4R2 & ERQ12-F2R2 Serial ATA Disk Array Systems 4 Pull the power supply handle out. 5 Remove the faulty power supply by pulling the power supply handle and pressing the release catch. Release catch 6 Insert a new power supply. 7 Push the power supply handle into place.
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Page 37: Upgrading Memory
ERQ12-U4R2 & ERQ12-F2R2 Serial ATA Disk Array Systems Upgrading Memory The disk array system takes a single 200 pin PC200 DDR SDRAM SO-DIMM with a maximum capacity of 1 GB. Follow these instructions to upgrade the memory. 1 Loosen the screws holding the controller cage in place. 2 Lift the handle and slide the controller-cage out of the chassis. - Page 38 ERQ12-U4R2 & ERQ12-F2R2 Serial ATA Disk Array Systems 5 Gently push the new DIMM into the socket at 45 degrees, then push the corners of the DIMM down. The DIMM is secured by the DIMM retaining clips. Note The DIMM module will fit in only one direction. Do not force the DIMM into place.
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Page 40: Appendix
Appendix Hardware Specifications Item Specification Host Interface SCSI Ultra320 (ERQ12-U4R2) or Fibre Channel (ERQ12-F2R2) Disk Interface 12 x SATA, 150 MB/s Dimensions 88 mm (H) x 446 mm (W) x 498 mm (D) Weight 25 Kg without disks RAID Functions •... - Page 41 SA-7230 & SA-7231 Serial ATA Disk Array Systems Item Specification Controller Intel i80321 64-bit RISC microprocessor Disk Interface Serial ATA I Disk Channels 12 channels Disk Interface Chipset Marvell MV88SX8050 Memory Type PC200 DDR 200-pin SO-DIMM Memory Sockets Memory Size Up to 1 GB LCD Interface One LCD panel, 2 lines by 16 characters...
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