SUPER MICRO Computer AOC-USAS-L4iR manual Rebuilding a Drive

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Add-on Card User's Guide

3.Use the arrow key to select Off or On for Disk WC (DWC) or Read Ahead.

4.When you see the prompt Change DWC or Change Read Ahead, use the arrow key to select Off or On, then press Enter to change the cache setting.

The settings are changed for all logical drives defined on the array.

3-4 Rebuilding a Drive

The MegaRAID BIOS CU enables you to rebuild a drive of a redundant array if the array has a failed drive. If the failed drive is still good (that is, if the drive is physi- cally present and its size is greater than or equal to the defined size of the array) it will be rebuilt. If the drive is small, an error message will appear and the MegaRAID BIOS CU will not allow the drive to be rebuilt. A rebuild cannot be started on a failed drive if its size is even 1 byte smaller than the defined size of the array.

Follow these steps to rebuild a drive:

1.Select Rebuild from the Management Menu.

2.When the list of drives appears, highlight the FAIL drive that you want to rebuild and press the Spacebar to select it.

3.After selecting the physical drive, press F10 and select Yes at the confirmation prompt.

The rebuild process begins, and a graph shows the progress of the rebuild until it is complete. Although the CU changes the disk drive state to Rebuild at this point, the change does not appear on the screen while the rebuild is in progress. If the CU detects a media error on the source drive during rebuild, it initiates a sector read for that block. If the sector read fails, the CU adds entries to the Soft Bad Block Management (SBBM) table, writes this table to the target drive, and displays an error message. Additional error messages are displayed if the SBBM table is 80% full or 100% full. If the SBBM table is completely full, the rebuild operation is aborted, and the drive is marked as FAIL.

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Contents AOC-USAS-L4i AOC-USAS-L4iR Manual Revision 1.0b Release Date October 17 Table of Contents MegaRAID Storage Manager SoftwareOverview and Installation Adding a Saved Storage Configuration Add-on Card Users Guide Operating Systems Supported Product FeaturesOverview An Important Note to UsersEurope Contacting SuperMicroHeadquarters Asia-PacificAn Important Note to Users ESD Safety GuidelinesGeneral Safety Guidelines Add-on Card Users Guide Front Connectors and Jumpers Front ConnectorsFront Connector and Pin Definitions #1. Internal SAS ConnectorJumper Settings Front Jumper Locations and Pin DefinitionsLED Indicators Front Pane LEDsRAID Minimum Drive Requirements RAID 1 ArraysAdd-on Card Users Guide Chapter Driver Installation Performing a Quick ConfigurationStarting the MegaRAID Bios CU Configuring Arrays and Logic DrivesUsing Easy Configuration Using New Configuration and View/Add Configuration Logical Drive ConfigurationSafety Information and Technical Specifications Creating a Global Hotspare Drive Initializing Logical Drives Logical Drive Submenu Setting the Hard Disk Write Cache and Read Ahead Policies Rebuilding a Drive Hot Plug Support Checking Data Consistency Viewing and Changing Device Properties Viewing and Changing Adapter Properties Viewing Physical Drive Properties Forcing Drives Online or OfflineViewing and Changing Logical Drive Properties Clearing a Storage Configuration Configuring a Bootable Logical DriveDeleting a Logical Drive Overview Creating Storage ConfigurationsMaintaining Storage Configurations Hardware and Software RequirementsMonitoring Storage Devices Installation Customer Information Screen Customer Information Screen Installing MegaRAID Storage Manager Software for Linux Linux Error Messages Add-on Card Users Guide Chapter MegaRAID Storage Manager Window and Menus Starting MegaRAID Storage Manager SoftwareSelect Server Window Select Server Window MegaRAID Storage Manager Window Physical/Logical View Panel Properties/Operations/Graphical View Panel Event Log PanelMenu Bar File MenuLog Menu Chapter Configuration Creating a New Storage ConfigurationFirst Screen Configuration Wizard Understanding Virtual Disk Parameters Using Auto Configuration Auto Configuration ScreenUsing Guided Configuration First Guided Conguration Screen Second Guided Configuration Screen Using Manual Configuration RAID Manual Configuration First Manual Configuration ScreenManual Configuration Defining a Virtual Disk Manual Configuration Adding a Hotspare Safety Information and Technical Specifications Using Manual Configuration RAID Using Manual Configuration RAID Adding Hotspare Disks Changing Adjustable Task Rates Changing Virtual Disk Properties Deleting a Virtual DiskSaving a Storage Configuration to Disk Clearing a Storage Configuration from a ControllerAdding a Saved Storage Configuration