LSI 25083 manual SAS Array Limitations, SAS RAID Controller Array Limitations

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Supports STP to enable communication with a SATA II device through an attached expander

Provides a serial, point-to-point, enterprise-level storage interface

Simplifies cabling between devices

Provides a scalable interface that supports up to 240 devices through the use of expanders

Note: The number of devices varies depending on the MegaRAID product. Check the LSI web site (http://www.lsi.com) for specific details about your product.

Supports wide ports consisting of 2, 3, or 4 PHYs within a single quad port

Supports narrow ports consisting of a single PHY

Transfers data using SCSI information units

1.6.2SAS Array Limitations

This section describes the array limitations of the MegaRAID 6Gb/s SAS RAID controllers. These limitations include the number of drives supported per controller, the maximum number of drives per controller, and the maximum number of virtual drives allowed per controller.

Table 1.1 lists the array limitations for the 6Gb/s SAS RAID controllers.

Table 1.1

SAS RAID Controller Array Limitations

 

 

 

 

 

 

 

 

 

 

 

 

 

 

9240-4i

9240-8i

9260-4i

9260-8i

9261-8i

9280 4i/4e

9280-8e

Specification

 

SAS

SAS

SAS

SAS

SAS

SAS

SAS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Maximum virtual

16

16

64

64

64

64

64

drives per controller

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Maximum drive groups

8

8

16

16

16

16

16

per controller

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Maximum virtual

16

16

16

16

16

16

16

drives per drive group

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Maximum drives per

16

16

32

32

32

32

32

drive group

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Summary of SAS RAID Controller Characteristics

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Copyright © 2009 by LSI Corporation. All rights reserved.

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Contents V e m b e r 2 0 0 USER’S GuideTrademark Acknowledgment Preface Organization AudienceMegaRAID SAS Software User’s Guide Document Number 80-00163-01 Rev. DRevision History ConventionsNotation Example Meaning and Use Fd1spSafety Instructions When Working Inside Your Computer Preface XPreface Contents Appendix a Glossary of Terms Abbreviations Customer Feedback XivContents Figures XviContents Tables XviiiContents Overview Chapter Overview2Overview SAS Controller Descriptions General Description General Description Configuration Scenarios Example of an LSI SAS Direct-Connect Application PCI Express Architecture Benefits of the SAS InterfaceOperating System Support Summary of SAS RAID Controller CharacteristicsSAS Features SAS RAID Controller Array Limitations SAS Array Limitations12Overview PCI Express Performance Sata II FeaturesUsability Features Drive Roaming Flexibility FeaturesDrive Migration 16Overview MegaRAID 6Gb/s SAS RAID Controller Features Hardware Specifications18Overview Mail Phone Support Technical Support20Overview Requirements Chapter MegaRAID SAS Hardware InstallationQuick Installation Detailed Installation Detailed InstallationBracket Screw Detailed Installation SAS Device Cables and Connectors After Installing the RAID ControllerSAS Device Cables and Connectors Sata II Connectors Serial Attached Scsi SAS Backplane Receptacle Connector Connecting the SAS 9260-8i RAID Controller to a Drive To Drive Enclosure Mini SAS Cable Plug Connector MegaRAID SAS Hardware Installation MegaRAID SAS 9240 RAID Controllers MegaRAID 6Gb/s SAS RAID Controller FamilyCard Layout for the MegaRAID SAS 9240-8i RAID Controller MegaRAID SAS 9260 RAID Controllers ConnectorsSAS 9240-4i/SAS 9240-8i RAID Controller Jumpers Jumper Type DescriptionCard Layout for the MegaRAID SAS 9260-8i RAID Controller JT1 SAS 9260-8i/SAS 9260DE-8i RAID Controller JumpersMegaRAID SAS Software User’s Guide for MegaRAID SAS 9261 RAID ControllerSAS 9261-8i RAID Controller Jumpers Card Layout for the MegaRAID SAS 9261-8i RAID ControllerJT6B2 MegaRAID SAS 9280 RAID ControllersSAS 9280-8e and SAS 9280DE-8e RAID Controllers Connector Description CommentsSAS 9280-8e and SAS 9280DE-8e RAID Controllers Card Layout for the MegaRAID SAS 9280-4i/4e RAID Controller SAS 9280-4i/4e RAID Controller ConnectorsIpmi MegaRAID 6Gb/s SAS RAID Controller Characteristics MegaRAID SAS 6Gb/s RAID Controller CharacteristicsData Transfer Rates Scsi Features Termination Flash SerialTechnical Specifications RAID Controller Specifications RAID Controller SpecificationsSpecification RAID Controllers MegaRAID SAS 9240, SAS 9260, SAS 9261, and SASArray Performance Features Array Performance FeaturesSpecification 9261, and SAS 9280 RAID Controllers MegaRAID SAS 9240, SAS 9260, SASElectrical Characteristics Fault ToleranceFault Tolerance Features Power Supply Requirements for SAS 9240 RAID ControllersPCI Edge Connector State 10 Power Supply for SAS 9240 RAID ControllersPower Supply Requirements for SAS 9260 RAID Controllers 11 Power Supply for SAS 9260 RAID Controllers 12 Power Supply for SAS 9261 RAID Controllers Power Supply Requirements for the SAS 9261 RAID ControllerPower Supply Requirements for SAS 9280 RAID Controllers 13 Power Supply for SAS 9280 RAID Controllers Safety CharacteristicsDevice driver ConfigurationDomain ValidationHost adapter HostBoard Hot spareRAID levels Peripheral devicesStriping SAS deviceStripe size Customer Feedback Excellent Good Average Fair Reader’s Comments