•Supports STP to enable communication with a SATA II device through an attached expander
•Provides a serial,
•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 |
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Specification |
| SAS | SAS | SAS | SAS | SAS | SAS | SAS |
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Maximum virtual | 16 | 16 | 64 | 64 | 64 | 64 | 64 | |
drives per controller |
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Maximum drive groups | 8 | 8 | 16 | 16 | 16 | 16 | 16 | |
per controller |
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Maximum virtual | 16 | 16 | 16 | 16 | 16 | 16 | 16 | |
drives per drive group |
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Maximum drives per | 16 | 16 | 32 | 32 | 32 | 32 | 32 | |
drive group |
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Summary of SAS RAID Controller Characteristics |
Copyright © 2009 by LSI Corporation. All rights reserved.