ATTO Technology SC 5700 operation manual RAID Level 1+0 striping, mirror spans two drives

Page 68

RAID Level 1+0: striping, mirror spans two drives

RAID Level 1+0 increases data transfer rates while ensuring security by writing the exact same data simultaneously to two or more different drives.

RAID Level 1+0 is used in applications requiring high performance and redundancy, combining the attributes of RAID Levels 1 and 0.

The ATTO FastStream supports an even number of 4 to 16 drives per RAID Level 1+0 group.

 

Disk 1

Disk 2

Disk 3

Disk 4

Stripe 1

Data 1

Data 1

Data 2

Data 2

Stripe 2

Data 3

Data 3

Data 4

Data 4

Stripe 3

Data 5

Data 5

Data 6

Data 6

 

RAID Level 4: striping, one parity drive

RAID 4 writes data across multiple drives or devices (striping) with parity blocks written to a single drive in the RAID group. This increases reliability while using fewer drives than mirroring.

RAID Level 4 is best suited for applications that perform mostly sequential access such as video applications.

You must have at least three drives to set up RAID Level 4.

 

Disk 1

Disk 2

Disk 3

Disk 4

Stripe 1

Data 1

Data 2

Data 3

Parity 1-3

Stripe 2

Data 4

Data 5

Data 6

Parity 4-6

Stripe 3

Data 7

Data 8

Data 9

Parity 7-9

 

RAID Level 5: striping, parity distributed among drives

RAID Level 5 increases reliability while using fewer drives than mirroring by using parity redundancy: parity is distributed across multiple drives.

The ATTO FastStream supports 3 to 16 drives per RAID Level 5 group.

 

Disk 1

Disk 2

Disk 3

Disk 4

Stripe 1

Data 1

Data 2

Data 3

Parity 1-3

Stripe 2

Data 5

Data 6

Parity 4-6

Data 4

Stripe 3

Data 9

Parity 7-9

Data 7

Data 8

Stripe 4

Parity 10-12

Data 10

Data 11

Data 12

xxi

ATTO Technology Inc. FastStream SC Installation and Operation Manual

Page 67 Page 69
Image 68
Page 67 Page 69
Contents FastStream SC Atto Technology, Inc Contents Configure Storage into RAID Groups Monitor Storage, ConfigurationsPhone Home Email Alerts Drive Diagnostics Scsi Enclosure Services SESManage Atto Devices, Configurations Appendix E Warranty XxviInterface Options Appendix B Design RAID Groups XixFastStream 5000 Series features RAID protection featuresAudio/video features Additional FastStream 5300 featuresAdditional FastStream 5500 features Additional FastStream 5700 featuresFastStream SC 5300 Physical Attributes Exhibit 1.1-1 The connector side of the FastStream SC5300 Reset/restore factory default switch Operating Temperature 5 C-40 CFastStream SC 5500 Physical Attributes SAS/SATA portsLEDs on the faceplate are Do not block the enclosure’s vents. FastStream SC 5700 Physical AttributesCooling and airflow Fibre Channel ports Page Install the FastStream Storage Controller Unpacking the packing box verifying contentsInstalling the FastStream Setting up Internet ExplorerUncheck the Require server verification check box Beginning initial configurationSelect Internet Options Select Initialize and Verify Drives Ensure Drive IntegrityBefore creating RAID groups After creating RAID groups Auto-Rebuild Configure Storage into RAID GroupsFeatures you may choose Fault Tolerance Selecting an applicationInitialization Preliminary stepsQuick Digital Video AudioGeneral Digital Video, General IT or Database Click CommitCreating a custom setup Page Page Changing current user name, password Creating a read-only user name, passwordModify System Values Changing system variablesWhen you have completed your changes, click on Commit Health and Status Monitor page appears Monitor Storage, ConfigurationsHealth and Status Monitor Configuration Display Scsi Enclosure Services SESPhone Home Email Alerts Click the Set up Error Notification buttonConfiguration Exhibit 6.1-1 The Error Notification Click the Read-Only Drive Test button Drive DiagnosticsRead only drive test Click on Identify Drive Drive performance and healthIdentifying a drive attached to the FastStream Scsi Enclosure Services SES Setting up SESIdentifying SES elements Monitoring SES elements Use the Health and Status MonitorSelect the Monitor Enclosure Services button Use the Manage menuModify Storage RAID group processesCreating RAID groups Deleting RAID groupsAdding drives to a RAID group Adding mirrors to a RAID configurationChanging RAID configuration RAID migration Modifying RAID group mapping Modifying RAID group partitionsRebuilding RAID groups Click on the Modify RAID Group Mapping buttonSelect the Add/Remove Hot Spares button FastStream process adding or removing Hot SparesModifying RAID options Removing RAID configuration data Advanced CLIPage Manage Atto Devices, Configurations Creating a unique name for your FastStreamDiscovering, managing other Atto devices Appliance NameSaving or restoring a configuration Click on the System Configuration Save/Restore buttonUsing the ExpressNAV Storage Manager Interface OptionsUsing the serial port Using TelnetType FastStream in the New Connection dialog box EnterUpdate Firmware Click UploadPage Symbol/Abbreviation Indicates Appendix a CLI Provides an ASCII-based InterfaceCLI error messages CLI summaryCommand Default Example IiiIpdhcp Command Default Example AutoResume CLI command explanationsAutoMap BlockDevClean Boot DelayDefaultInterleave BlockDevIdentifyDriveTestConfig DumpConfigurationEmailPassword DriveTestFCPortErrors EthernetSpeedEventLog EventLogFilterFCPortList FCSCSIBusyStatusFCTargets FCWWNameIPSubnetMask IsReservedMaxOpTemp MetricsPassword ReadOnlyPasswordResetFCPortErrors RestoreConfigurationRGCancelAddStorage RGAutoRebuildRGCommit RGCreateRGWaitTimeout RGPreFetchRGRebuild RGResumeConversionSaveConfiguration RMStatusRoute RouteDisplaySCSIPortReset SCSIPortResetOnStartupSerialPortBaudRate SerialPortEchoSESDiskFailureAlarm Default disabledSESEnclosures SESIdentifyTemperature TailEventLogTime TimeZoneDvraid Digital Video RAID Appendix B Design RAID GroupsJbod Just a Bunch of Disks RAID Level 1 plus additional mirroring RAID Level 0 striping, no redundancyRAID Level 1 mirroring duplicate drives RAID Level 5 striping, parity distributed among drives RAID Level 1+0 striping, mirror spans two drivesRAID Level 4 striping, one parity drive Disk Stripe Data Cable types Connecting Scsi devices to Scsi portsAppendix C Scsi Cabling Support Max Bits EndedAppendix D Standards and Compliances Declaration of ConformityAppendix E Warranty Manufacturer limited warranty
Top Page Image Contents