ATTO Technology S-Class manual Configuring a fully-populated array, To set up RAID Level 5 groups

Page 70
Rebuilding RAID Level Configurations

6.4 RAID Level 5

RAID Level 5 increases reliability while using fewer disks than mirroring by employing parity redundancy. Distributed parity on multiple drives provides the redundancy to rebuild a failed drive from the remaining good drives.

CAUTION

Selecting RAID configuration causes all previous drive data on the Diamond Storage Array to be erased. Make sure all information is backed up before configuring RAID groups.

In RAID Level 5, parity data is added to the transmitted data at one end of the transaction, then the parity data is checked at the other end to make sure the transmission has not had any errors.

In the Diamond Storage Array, transmitted data with the added parity data is striped across disk drives. A hardware XOR engine computes parity, thus alleviating software processing during reads and writes.

The array uses parity declustering, a special case of RAID Level 5. Parity information is spread across each LUN, not concentrated on one drive or sled.

When you initially set up RAID groups using the QuickRAID command, groups are synchronized automatically because there is no pre-existing data on the drives. However, drives may display as “degraded, and you need to set all LUNs to OK status. Refer to

on page 63.

Configuring a fully-populated array

You may set up a fully-populated Diamond (12 sleds) into one, two, three or four RAID Level 5 groups, with or without hot spare sleds, using the QuickRAID 5 command.

To set up RAID Level 5 groups

1Connect to Diamond Storage Array services via the RS-232 port or the optional Ethernet management services card (refer to Accessing the Array on page 17). You should now be in the CLI.

2Continue with the CLI or access the RAID page of the ExpressNAV interface (refer to ATTO ExpressNAV: Browser-based Interface on page 25).

Note

Because the ExpressNAV pages take you through this process easily, the following instructions are based on the CLI commands. Use these instructions as a guide in ExpressNAV.

3Decide how many RAID Level 5 groups you want (1, 2, 3 or 4)..

4Type set QuickRAID5 [01234] 0 returns the array to JBOD

5Type SaveConfiguration Restart to save the RAID Level 5 configuration.

6A Ready prompt displays. You must zero all drives and parity to make all RAID Level 5 drives coherent. Type RAID5ClearData all

CAUTION

This is a destructive operation: all information stored on these drives is lost.

DO NOT interrupt power until the RAID5ClearData operation has completed (three to six hours).

7Information displays on the screen while the array updates NVRAM ending with a Ready*.

8Type SaveConfiguration.

9Type FirmwareRestart to reboot the array.

10Reboot the host computer connected via Fibre Channel or SCSI to the array.

11The array is now configured. To verify the configuration, type DriveInfo. If any sleds are missing, the sled slots are reported as offline.

To set up one RAID Level 5 group with one Hot Spare sled

1Connect to Diamond Storage Array services (refer Accessing the Array on page 17) and use the Command Line Interface or enter ATTO ExpressNAV browser interface Advanced CLI Configuration page.

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ATTO Technology Inc. Diamond Storage Array Installation and Operation Manual

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Contents Diamond Storage Array Class Page Page Contents In-band CLI Over the Fibre Channel Serial Port Configuration Commands Configuring Drives RAID Interleave Parameters Appendix D Specifications Vii Appendix E Warranty ViiiPreface Atto Technology, IncPage Diamond Storage Array features Diamond Storage Array Product OverviewFibre Channel model Scsi modelAdxt Powers ATA to New Levels Diamond Storage Array Technical OverviewATA Interface Engine AIE The interface to each Set up the Ethernet connection Installation InstructionsPhysical setup Connect to EthernetSet up RAID configuration Floor model ComponentsRack mount Components Rack mount cabinets with stationary shelf or tray Physical Set UpSpaced rail pairs in some rackmount cabinets Sliding shelf or tray type systems should neverGeneral instructions Autoconfiguration Connecting a Fibre Channel ArrayManual configuration Fibre Channel connections Bus speed, MB/sec Bus width Max. bus lengths Max. device Connecting a Scsi ArrayTo connect a Scsi array BitsScsi connections Logical numbering Determining Drive and Sled DesignationsPhysical numbering Numbering conventionsRAID Level 10 QuickRAID10 The QuickRAID10 ExamplesUnique serial number for each LUN RAID Level 5 QuickRAID5 with a fullyAtto ExpressNAV Accessing the ArrayCommand Line Interface RS-232 portSnmp Details In-band CLI Over the Fibre ChannelInitiator Host Diamond Array Invalidparameterincdb will be returned Initiator/Host Diamond Storage ArraySerial Port Access Serial port access To use Telnet Ethernet Access Telnet and Snmp ProtocolsTo connect to the Ethernet port To use SnmpType SaveConfiguration restart to reboot the array Traps are generated for the following situationsOpening an ExpressNAV session Atto ExpressNAV Browser-based InterfaceBrowser compatibility Navigating ExpressNAVInformation Sidebar ExpressNAV Pages Logical Units ConfigurationClear Data RebuildCommand Line Interface Use and Guidance Command Line Interface actions and responsesPage Summary of CLI Commands Command Defaults ExampleCommand Defaults Example General Use Commands General CLI commands Ethernet Commands TelnetTimeout TelnetPasswordTelnetUsername Fibre Channel Configuration Commands FcPortName FcPortInfoFcPortList FcWWNameSerialPortHandshake Serial Port Configuration CommandsSerialPortBaudRate SerialPortEchoSerial port CLI commands Diagnostic Commands SMARTData SledFaultLEDTemperature VirtualDriveInfoMaxEnclTempAlrm Maintenance CommandsFcScsiBusyStatus MinEnclTempAlrmMaintenance CLI commands Drive Configuration Commands LUNState DriveWipeIdeTransferRate QuickRAID0RAID5ClearDataStatus RestoreModePagesRAID5ClearData RAIDInterleaveExamples, refer to Information Commands Results on Jbod Just a Bunch of Disks Configuring DrivesRAID Level Hot Spare sleds InterleaveEnhancing performance To set up the Jbod configuration JbodJbod RAID Level Sled-based versus disk-basedTo remove RAID Level 0 groups LUNs virtual drive numbersPage Page Type SaveConfiguration Storage Management To set up RAID Level 1 groupsType SaveConfiguration To remove RAID groupsTo set up RAID Level 1 with Hot Spare sleds Type set QuickRAID 1To set up RAID Level 5 groups Configuring a fully-populated arrayTo set up one RAID Level 5 group with one Hot Spare sled To set up two RAID Level 5 groups with two Hot Spare sleds Type set QuickRAID5 1 Type SaveConfiguration RestartType set QuickRAID5 2 Type SaveConfiguration Restart LUN Type set QuickRAID5 ALL Type SaveConfiguration Restart Removing RAID groupsTo set up RAID Level 10 groups Type set QuickRAID10 0 1 2To set up RAID Level 10 with Hot Spare sleds Type set QuickRAID10 1 Type SaveConfiguration RestartRebuilding RAID Configurations Set AutoRebuild disabled saveconfiguration restart To synchronize mirrored drives manuallyRAID Interleave Parameters To change the RAID Interleave parameterRAID interleave Hardware Maintenance Maintenance Hot Swap Operating Instructions Disk drivesTo replace a blower assembly Power suppliesBlower assemblies Type set QuickRAID1 Type SaveConfiguration Restart Optional Hot Spare SledTo set up two RAID Level 5 groups with Hot Spare sleds Virtual Drive Hot Spare sledsProcedure Copying DrivesCopy drives Updating firmware using the RS-232 serial port Updating FirmwareCd c\diamond\flash Type put ....imaSystem Monitoring and Reporting Power supply monitoring System fault LED and error codesNumber of blinks Windows 2000 special instructions Error messages TroubleshootingCommand Line Interface messages Specific situations and suggestions If LUNs do not display on the host Type FirmwareRestartFactory Default Resetting DefaultsDefault To return to Default settingsCommand Default Reset if default Reset during Chosen Feature Fibre ChannelAppendix B Information Commands Results DriveInfo sled ID drive IDInfo all V80DTESCLUNInfo LUN LunInfoVirtualDriveInfo active planned Virtual Drive ID VirtualDriveInfoSafety compliances EMC specifications Radio and television interferenceFloor mount dimensions Rack mount dimensionsEnvironmental and physical Manufacturer limited warranty Contact Atto Technology, Inc

S-Class specifications

ATTO Technology S-Class is a comprehensive solution designed to optimize storage and networking performance for digital content creation and enterprise environments. This product line specializes in high-performance connectivity, facilitating seamless data transfer and management.

One of the key features of the S-Class is its advanced RAID (Redundant Array of Independent Disks) capabilities. This incorporates various levels of RAID configurations, enabling users to choose the right balance between performance and redundancy. The technology ensures data integrity while maximizing throughput, a crucial aspect for workflows dealing with large files such as video editing and graphic design.

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The S-Class also incorporates intelligent storage management features. The ATTO ConfigTool offers a user-friendly interface for monitoring and configuring storage settings, allowing for real-time adjustments and performance tuning. This ensures that users can effectively manage their storage resources, balancing capacity and performance according to their specific needs.

Furthermore, the technology employs a robust set of data protection mechanisms, including snapshot and backup capabilities. This ensures that critical data is safeguarded against potential loss, enhancing operational reliability. The integration of these features supports comprehensive workflow solutions, benefiting industries that require continuous access to high-volume data.

Lastly, the S-Class is built to integrate seamlessly with popular operating systems and platforms, providing versatility and ease of deployment. Whether used in a small studio or a large enterprise environment, ATTO Technology's S-Class stands out as a solution that combines speed, reliability, and manageable performance, making it a top choice for professionals who demand the best in their storage and network infrastructure.

In summary, ATTO Technology S-Class is not just a storage solution; it's a gateway to unlocking peak performance in data management, tailored for the challenges of today’s data-driven landscape.
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