Apple NMB-003 manual Storage Capacities for Xserve RAID Schemes

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Storage Capacities for Xserve RAID Schemes

RAID Level	Capacity

RAID 0	Total of all drives

RAID 1	Total of one drive

RAID 0+1	One-half the total capacity of all drives (sum of RAID 1 member
	sets)

RAID 3	Total of all drives minus one drive (parity disk)

RAID 5	Total of all drives minus one drive (distributed parity)

RAID 10	One-half the total of all drives

RAID 30	Total of all drives minus two drives

RAID 50	Total of all drives minus two drives

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Contents User’s Guide Apple Computer, Inc Apple Computer, Inc. All rights reservedContents Using the Xserve RAID System Installing the SystemConnecting Xserve RAID to a Host System and a Network Installing or Replacing ComponentsData Storage Methods Installing Xserve RAID Hardware and SoftwareConnecting a 14-Drive System to a Host Computer or Switch RAID OverviewGlossary Appendix a Specifications Appendix B Safety, Maintenance, and ErgonomicsAbout 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 Your System at a Glance-Back Panel RAIDRedundant, 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 Precautions for Handling the System Preparing to Install Xserve RAID in a RackGuidelines for Installation Use your leg muscles to liftLift with a smooth motion don’t jerk the load up or down Choosing the System’s Location in the RackElectrical Power Rack StabilityOperating Environment SecurityMounting 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 Two mounting screws for attaching the system to the rack Assemble the Brackets and ExtendersTighten 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 Using the Xserve RAID System Starting Up the SystemUsing Status Lights and Other Indicators Turning Off the SystemLight 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 Replacing a Power Supply Follow these steps to replace 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 Xserve RAID Hardware and Software Setting Up the Xserve RAID SystemInstalling the system in a rack or cabinet RAID OverviewScalability for expansion of storage Connecting to an Ethernet networkAbout RAID Storage How RAID WorksData Storage Methods RAID 0+1 requires a minimum of four drives RAID LevelsRAID 3 requires a minimum of three drives RAID 5 requires a minimum of three drivesHardware and Software RAID What’s Next? Tools for Configuring the Xserve RAID System Planning RAID Storage For 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 RAID System With Seven Drive ModulesDisk 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 Four-Drive System to a Host Computer or Switch Connecting a 14-Drive System to a Host Computer or SwitchGlossary Common RAID TermsPage RAID Controller Specifications Fibre Channel PCI Card SpecificationsSpeciﬁcations Ethernet Specifications Apple Drive Module SpecificationsDimensions and Operating Environment UPS Interface SpecificationsPin D connector Power Supply Specifications Cooling Module SpecificationsBattery Module Optional Information Safety, Maintenance, and Ergonomics Important Safety InformationPower Supply Cleaning Your EquipmentHandling Your System Safety, Maintenance, and Ergonomics Page Complies with European Directive 89/336/EEC