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Chaparral G5312/G7313, K5312/K7313 manual Managing Spares, Managing Dedicated Spares

Models: K5312/K7313 G5312/G7313

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Managing Spares

Chaparral RAID controllers automatically reconstruct redundant (fault-tolerant) arrays (RAID 3, RAID 4, RAID 5, RAID 50, and mirrored) if an array becomes critical and a properly sized spare drive is available. An array becomes critical when one or more member drives fails.

You can set up two types of spare drives:

✁Dedicated—available drive that is assigned to a specific array. See page 6-1.

✁Pool—available drive that is assigned to the pool, which can provide a spare for any failed drive in any redundant array. See page 6-5.

In addition, if you enable the Dynamic Spares option and a drive fails, you can replace the drive and the controller will rescan the bus, find the new disk drive, and automatically start reconstruction of the array. See page 6-3.

The controller looks for a dedicated spare first. If it does not find a properly sized dedicated spare, it looks for a pool spare.

If a reconstruct does not start automatically, it means that no valid spares are available. To start a reconstruct, you must:

1Replace the failed drive, if no other drive is available.

2Add the new drive or another available drive as a dedicated spare to the array or as a pool spare.

Remember that any pool spares added might be used by any critical array, not necessarily the array you want

Managing Dedicated Spares

Dedicated spares are unused disk drives that you assign as a spare to a specific array. The disk must be as large as the smallest member of the array. You cannot use a dedicated spare drive in an array or as a pool spare.

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Chaparral G5312/G7313, K5312/K7313 manual Managing Spares, Managing Dedicated Spares

Contents

User’s Guide Page Trademarks CopyrightChanges Technical SupportCanadian Compliance Statement Contents Hardware Installation Monitoring System Status Managing Disk Drives and Enclosures Glossary K-Series User’s Guide Viii About This Guide IntroductionConventions Product FeaturesMotherboard CPU Subsystem G-Series Motherboard Ultra2 Scsi Channels G-SeriesHardware Configuration and Management Support G-Series Battery Interface G-SeriesMotherboard Disk Cache G-Series Daughterboard G-Series Onboard Connectors G-SeriesMotherboard CPU Subsystem K-Series Motherboard Ultra2 Scsi Channels K-SeriesMotherboard Disk Cache K-Series Integrated Battery Backup and Interface K-SeriesHardware Configuration and Management Support K-Series Fibre Channel FeaturesOnboard Connectors K-Series Fibre Channel Connection K-SeriesSpecifications SpecificationsPhysical G-Series Electrical G-SeriesEnvironmental G-Series 3shows the environmental specifications of the controllersBattery G-Series Electrical K-Series Physical K-SeriesEnvironmental K-Series 7shows the environmental specifications of the controllersBattery K-Series External Documents Reference DocumentsChaparral Documents K-Series User’s Guide Connecting the Controller Hardware InstallationConnecting to the Scsi Port Connecting to the Fibre Channel PortTo connect to the Fibre Channel port Connecting to the RS-232 PortTo connect to the RS-232 port K-Series User’s Guide Setting Value Accessing the Disk Array Administrator SoftwareSettingValue Do this Navigating the Disk Array Administrator SoftwareChanging the Screen Display Disk Array Administrator Menu TreeSelect Function Menu tree K-Series User’s Guide Creating Arrays Creating and Managing ArraysMinimum Maximum RAID Level No. Drives To create an array Creating and Managing Arrays RAID Type screen displays Scsi ID K-Series User’s Guide Creating and Managing Arrays Viewing Array Status Managing ArraysTo view the status of an array To view the array statistics Viewing Array StatisticsCreating and Managing Arrays To reset array statistics Resetting Array StatisticsTo view drive status Viewing Drive StatusTo stop the array initialization process Stopping the Array Initialization ProcessSelect Abort Initialization and press Enter To verify an array Verifying an ArrayTo view verification status Viewing Verification StatusTo stop the verification process Reconstructing an ArrayRAID Level Number of Drives You Can Add Expanding Array CapacityTo expand an array To view expand status Viewing Expand StatusTo change the array LUN Changing the Array LUNTrusting an Array Changing the Array NameTo change the array name To trust an array To delete an array Deleting an ArrayDisplaying the Event Log Monitoring System StatusViewing One Event at a Time Viewing the Most Recent EventSelect View Event Log and press Enter To display one event at a timeCapturing the Event Log File Viewing a Whole Screen of EventsTo display a whole screen of events To capture the event log fileGroup Field What displays Displaying Hardware and Configuration InformationLUN Capi SEP To display hardware information onlyPress Esc to return to the Utilities Menu To display hardware and configuration information Displaying Overall Statistics To access the general array statistics To access the read/write histogram To reset overall statistics Resetting Overall StatisticsManaging Dedicated Spares Managing SparesTo add a dedicated spare Adding a Dedicated SpareDeleting a Dedicated Spare Enabling Dynamic SparesTo delete a dedicated spare drive To enable dynamic spares Adding a Spare to the Spare Pool Managing the Spare PoolTo add a pool spare To delete a spare from the spare pool Deleting a Spare from the Spare PoolSelect Delete Pool Spare and press Enter To display the spare pool Displaying the Spare PoolSelect Display Pool Spares and press Enter K-Series User’s Guide Rebooting the Controller Configuring the ControllerTo shut down and restart the controller Changing the Date and TimeTo set the controller’s date To set the controller’s time Understanding LUNs Configuring the Controller Changing the Controller’s Target ID and LUN Do this To change the controller’s target ID and LUNKeep the same Loop ID for the channel at all times To configure the channel Configuring the Scsi ChannelsK-Series User’s Guide 1shows an example of how you can use LUN zoning Working with LUN ZoningTo view known WWNs Viewing Known WWNsSelect Display Host List and press Enter To create or change names for WWNs Creating Names Aliases for Server WWNsSelect Add or Name Host and press Enter To set up LUN zoning Configuring LUN ZoningK-Series User’s Guide To change the sample rate Changing the Sample RateAlarm threshold What to do when the alarm sounds Changing the Alarm Mute SettingSoftware To enable or disable the alarmTo lock the cache setting Locking the Cache SettingTo change the battery setting Enabling and Disabling the BatteryChanging the Utility Priority To change Utility priority Rescanning All ChannelsSelect Utility Priority and press Enter To rescan all channels Pausing I/OTo pause I/O Restoring Default SettingsSelect Restore Defaults and press Enter To restore the default settingsUpgrading Firmware Upgrading the Controller’s FirmwareSee Chaparral Technical Support on To upgrade the controller’s firmwareK-Series User’s Guide Managing Disk Drives Managing Disk Drives and EnclosuresDisplaying All Drives Displaying Drive InformationTo display all drives To view drive status Clearing Metadata from a DriveEnabling and Disabling Write-back Cache To change the write-back cache settingTo clear metadata from a drive K-Series User’s Guide To display disk cache status Displaying Disk Cache StatusEnabling and Disabling Smart Changes To enable or disable Smart changesTo blink a drive Blinking a Drive LEDTo take down a drive Taking Down a DriveManaging SAF-TE Enclosures Testing a DriveTo test a drive To change the SEP LUN Changing the SEP LUNDo this To change the SEP settings Changing the Additional SEP SettingsManaging Disk Drives and Enclosures K-Series User’s Guide Terminal Emulator and COM Port Problems TroubleshootingProblem Screen continuously puts out garbage characters Chaparral Technical SupportProblem Screen is updated, but won’t respond to keystrokes Array ProblemsProblem Array is much smaller than it should be Problem The host Scsi Bios scan hangs Host Scsi Channel ProblemsTo change the backoff percentage Problems During Bootup Device Scsi Channel ProblemsProblem Controller failed the onboard memory test Controller ProblemsProblem One of the Post diagnostic test failed Problem The system hangs at CTsrv startingProblem The controller reports a Battery error Problem The controller reports a Sdram memory errorCritical Event Definition Recommended ActionWarn ErrorsUsing the Loader Utility Menu Using the Loader Diagnostics MenuUnderstanding Scsi Errors Disk ErrorsDescriptions Sense Key DescriptionDisk Channel Errors Error Code Description Voltage and Temperature Errors and Warnings K-Series User’s Guide Array Types Array BasicsRAID 0 Striped Disks RAID RAID 1, RAID 1/O Mirrored DisksArray Basics Comparing RAID Levels Volume SetsMin No Description Strengths Weaknesses Level Drives RAID 3 RAID Mixing Disks on Different RAID Controller Channels Glossary K-Series User’s Guide Glossary K-Series User’s Guide Glossary K-Series User’s Guide Index K-Series User’s Guide Index K-Series User’s Guide Index Scsi ID Index K-Series User’s Guide