Apple NMB-003 manual RAID 0+1 and RAID 10 Schemes

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RAID 0+1 and RAID 10 Schemes

On the Xserve RAID system, RAID 0+1 is a stripe of mirrored pairs. An example of this conﬁguration is shown at the top of the illustration below.

Using a combination of the hardware controller and software, you conﬁgure the system using RAID 10 with two drive modules on each controller. The drive modules on each side can be either striped together or mirrored.

RAID 0+1

Appears

as

RAID 0+1

Disk 1

RAID 10

Appears

as

Mirror

Mirror

Disk 1

Use software RAID to stripe

two RAID sets together.

RAID 10 (alternate configuration)

Appears

as

Stripe

Stripe

Disk 1

Use software RAID to mirror two RAID sets.

Planning RAID Storage for the Xserve RAID System

69

Image 69

Contents User’s Guide Apple Computer, Inc. All rights reserved Apple Computer, IncContents Connecting Xserve RAID to a Host System and a Network Installing the SystemUsing the Xserve RAID System Installing or Replacing ComponentsConnecting a 14-Drive System to a Host Computer or Switch Installing Xserve RAID Hardware and SoftwareData Storage Methods RAID OverviewAppendix B Safety, Maintenance, and Ergonomics Glossary Appendix a SpecificationsAbout This Guide Page Introducing Xserve RAID Unpacking the System Introducing Xserve RAID Your System at a Glance-Front Panel Indicates temperature status green is OK, red is failure RAID Your System at a Glance-Back PanelRedundant, hot-swappable cooling module cools the system Your System at a Glance-Mounting Hardware Use this bar to fasten extenders C and D for a deep rack Page Guidelines for Installation Preparing to Install Xserve RAID in a RackPrecautions for Handling the System Use your leg muscles to liftChoosing the System’s Location in the Rack Lift with a smooth motion don’t jerk the load up or downRack Stability Electrical PowerSecurity Operating EnvironmentMounting Xserve RAID in a Rack Getting Ready to Install the System Determine the Position for the System in the Rack Installing the System Prepare the System for InstallationFollow the instructions in Unpacking the System on Assemble the Brackets and Extenders Two mounting screws for attaching the system to the rackTighten the screws and then remove the template Repeat this procedure for the second bracket and extender Six short screws for assembling two brackets and extenders Secure each bolt with a washer Adjust the mounting Mounting Xserve RAID in a Rack Mount the System in the Rack Secure the System in the Rack or Cabinet Moving the Xserve RAID System System and a Network Installing the Host Bus Adapter Card in the Host System Connecting Xserve RAID to a Host System or SwitchAbout Fibre Channel Connections and Cables Connecting the System to Xserve or a Power Mac G4 Connecting Xserve RAID to a Switch or Hub Removing Cables From the Xserve RAID and Host Systems Connecting to a Network Connecting Power to the System Connecting an Uninterruptible Power Supply Plug one of the system’s power cords into the UPSFollow these steps to connect a UPS unit to the system Starting Up the System Using the Xserve RAID SystemTurning Off the System Using Status Lights and Other IndicatorsLight manually check If the System Has a Problem Installing or Replacing an Apple Drive Module Follow these steps to install or replace a drive moduleAbout Replacing Components Security lock Follow these steps to replace a power supply Replacing a Power SupplyReplacing a Cooling Module Installing or Replacing Components Replacing a RAID Controller Module Installing or Replacing a Battery Module Obtaining Additional Replacement Components Installing the system in a rack or cabinet Setting Up the Xserve RAID SystemInstalling Xserve RAID Hardware and Software RAID OverviewAbout RAID Storage Connecting to an Ethernet networkScalability for expansion of storage How RAID WorksData Storage Methods RAID Levels RAID 0+1 requires a minimum of four drivesRAID 3 requires a minimum of three drives RAID 5 requires a minimum of three drivesHardware and Software RAID What’s Next? Planning RAID Storage For the Xserve RAID System Tools for Configuring the Xserve RAID SystemRAID Controllers and Drive Modules Drive modules Controllers Xserve RAID Schemes RAID RAID 0+1System With Four Drive Modules RAID 1 Schemes RAID 3 or RAID 0+1 and RAID 10 Schemes System With Seven Drive Modules RAIDDisk Mirror Mirror Mirror Hot spare RAID 3 or 5 Hot spare RAID 3 or Disk System With 14 Drive Modules RAID 0+1 Disk Hot spare RAID 1 and RAID 3 or Disk Mirrors RAID1 Hot spare RAID RAID 30 and 50 Schemes Storage Capacities for Xserve RAID Schemes Xserve RAID Hardware Connections Connecting a 14-Drive System to a Host Computer or Switch Connecting a Four-Drive System to a Host Computer or SwitchCommon RAID Terms GlossaryPage RAID Controller Specifications Fibre Channel PCI Card SpecificationsSpeciﬁcations Dimensions and Operating Environment Apple Drive Module SpecificationsEthernet Specifications UPS Interface SpecificationsPin D connector Power Supply Specifications Cooling Module SpecificationsBattery Module Optional Information Important Safety Information Safety, Maintenance, and ErgonomicsPower Supply Cleaning Your EquipmentHandling Your System Safety, Maintenance, and Ergonomics Page Complies with European Directive 89/336/EEC