Table 3.8

Array Performance Features (Cont.)

 

 

 

 

 

MegaRAID SAS 9240, SAS 9260, SAS

Specification

 

9261, and SAS 9280 RAID Controllers

 

 

Maximum queue tags per drive

As many as the drive can accept

 

 

 

Stripe sizes

 

8 Kbytes, 16 Kbytes, 32 Kbytes, 64 Kbytes,

 

 

128 Kbytes, 256 Kbytes, 512 Kbytes, or

 

 

1 Mbyte

 

 

Maximum number of concurrent

255

commands

 

 

 

 

 

3.3.3Fault Tolerance

Table 3.9 lists the fault tolerance features for the MegaRAID 6Gb/s SAS RAID controllers.

Table 3.9 Fault Tolerance Features

 

MegaRAID SAS 9240, SAS 9260, SAS 9261,

Specification

and SAS 9280 RAID Controllers

 

 

Support for SMART1

Yes

Drive failure detection

Automatic

 

 

Drive rebuild using hot spares

Automatic

 

 

Parity generation and checking

Yes

 

 

1.The Self Monitoring Analysis and Reporting Technology (SMART) detects up to 70 percent of all predictable drive failures. In addition, SMART monitors the internal performance of all motors, heads, and drive electronics.

3.3.4Electrical Characteristics

This subsection provides the power supply requirements for the

MegaRAID 6Gb/s SAS RAID controllers.

3.3.4.1Power Supply Requirements for SAS 9240 RAID Controllers

All power is supplied to the SAS 9240 RAID controllers through the PCI Express 3.3V rails and the 12V rail. Onboard switching regulator circuitry operating from the 3.3V rails and the 12V rail provide the necessary

Technical Specifications

3-17

Copyright © 2009 by LSI Corporation. All rights reserved.

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LSI 25083 manual Electrical Characteristics, Fault Tolerance Features, Specification SAS 9280 RAID Controllers