Dell SCSI 6/IR manual Example of Integrated Mirroring RAID

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Integrated Mirroring

With Integrated Mirroring (RAID 1), data written to one disk is simultaneously written to another disk. If one disk fails, the contents of the other disk can be used to run the system and rebuild the failed physical disk. The primary advantage of Integrated Mirroring is that it provides 100 percent data redundancy. Because the contents of the disk are completely written to a second disk, it does not matter if one of the disks fails. Both disks contain the same data at all times. Either physical disk can act as the operational physical disk.

NOTE: Mirrored physical disks improve read performance by read load balance.

Figure 1-3. Example of Integrated Mirroring (RAID 1)

Stripe element 1 Stripe element 2 Stripe element 3 Stripe element 4

Stripe element 1 Duplicated Stripe element 2 Duplicated Stripe element 3 Duplicated Stripe element 4 Duplicated

Overview

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Contents User’s Guide August JM360 Contents Replacing and Rebuilding a Degraded Virtual Disk Contents Corporate Contact Details Taiwan Only Contents Safety Instructions Safety GeneralSafety Protecting Against Electrostatic Discharge SAS 6/iR Adapter Hardware Architecture OverviewIntegrated Striping About RAIDRAID Terminology RAID LevelsExample of Integrated Mirroring RAID Integrated MirroringOverview SAS 6/iR Features RAID 0, RAID Installing the SAS 6/iR Adapter Hardware InstallationInstalling a SAS 6/iR Adapter Connecting the Cable Hardware Installation Creating a Driver Diskette Driver InstallationBoot the system using the Microsoft Windows Installation CD Installing a Windows Driver for a New SAS 6/iR ControllerUpdating an Existing Windows Driver Creating a Driver Diskette Installing From the Dell Operating System MediaInstalling the Red Hat Linux Driver Installing the Driver Using an Update RPM Installing the DriverInstalling the Suse Linux Enterprise Server Driver Driver Installation Upgrading the Kernel Post Messages SAS 6/iR BiosBios Fault Code Messages Functions Performed Configuration UtilityStarting the Configuration Utility Create New Array Integrated RAID Configuration and Management ScreensNavigating the Configuration Utility Select New Array TypeCreated Exit Screen View ArrayManage Array Creating an Integrated Striping Virtual Disk Performing Configuration TasksCreating a Integrated Mirroring Virtual Disk Activating a Virtual Disk Viewing Virtual Disk PropertiesSynchronizing a Virtual Disk Replacing and Rebuilding a Degraded Virtual Disk Deleting a Virtual DiskHot Spare Failover SAS 6/iR Bios General Problems TroubleshootingBios Boot Order Other disk in the virtual disk Physical Disk Related IssuesConfiguration Utility Error Messages Press Ctrl+C to Enable Bios Bios Error MessagesSpinning up the device Bios Updating the Firmware Firmware Update UtilityUpdating the Firmware Obtaining Assistance Technical Support and Customer ServiceGetting Help Automated Order-Status Service Online ServicesDell Enterprise Training Problems With Your Order Before You Call Regulatory Notices Regulatory Notices Regulatory Notice Regulatory Notices Corporate Contact Details Taiwan Only Regulatory Notices Adapter GlossaryDkms Nvdata Post Smart Glossary ESD IndexWindows, 19 drivers, 19 updating drivers