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

1-11

Copyright © 2009 by LSI Corporation. All rights reserved.

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