You can use the Nytro MegaRAID controllers in three scenarios:
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Low-end, Internal SATA II and III Configurations – In these configurations, use the Nytro MegaRAID controller as a high-end SATA II and III-compatible controllers that connect, either directly or through a port expander. These configurations are mostly for low-end or entry servers. Enclosure management is provided through an out‑of‑band I2C bus. Side bands of both types of internal SAS connectors support the SFF-8485 (SGPIO) interface.
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Midrange Internal SAS Configurations – These configurations are like the internal SATA II and III configurations, but with high-end disks. These configurations are more suitable for low-range to midrange servers.
The following figure shows a direct-connect configuration. The I2C interface communicates with peripherals. The external memory bus provides a 32-bit memory bus, parity checking, and chip select signals for pipelined burst synchronous static random access memory (PBSRAM), nonvolatile static random access memory (NVSRAM), and Flash ROM.
Figure 1. Example of an LSI SAS Direct-Connect Application
NOTE The valid drive configuration combination also applies to hot spares. For hot spare information, see Hot Spares.
DB15-000988-01 - August 2012 |
Copyright© 2012 by LSI Corporation. All rights reserved. Advance copy – Not for General Distribution. |