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LSI Nytro MegaRAID Application Acceleration Card User Guide

August 2012

Overview of the LSI Nytro MegaRAID Card

Overview

 Nytro Flash module helps protect cache in the event of power fail — no battery required

 SuperCap kit (option) to protect DRAM content in the event of power failure

 Faster rebuilds will occur due to servicing most storage requests from Nytro Flash module

 Compatible with existing MSM management interfaces

 Zero administrative overhead

1.1.2 Configuration Scenarios

You can use the Nytro MegaRAID cards in the following scenarios:

 Low-end, internal SATA configuration:

In this configuration, use the RAID card as a high-end SATA, SATA II, or SATA III compatible card that directly-

connects up to four drives or an internal expander. This configuration is mostly for low-end or entry servers.

Enclosure management is provided through an out-of-band I

C bus.

 Midrange internal SAS configuration:

This configuration is like an internal SATA configuration, but with high-end SAS drives. This configuration is more

suitable for low-range to midrange servers.

The following figure illustrates a direct-connect configuration. The Inter-IC (I

C) interface communicates with

peripherals. The external memory bus provides a 32-bit memory bus, parity checking, and chip select signals for

pipelined synchronous burst static random access memory (PSBRAM), non-volatile static random access memory

(NVSRAM), and Flash ROM. The card can connect to an internal drive bay that uses an expander.

Figure 2 Example of an Nytro MegaRAID Card with Direct-Connect Application

PCI Express Interface

Nytro Flash Module

SAS

PCI Express

RAID Controller

Flash ROM/

PSBRAM/

NVSRAM

32-Bit

Memory

Address/Data

Bus

Interface

SAS/SATA Device

PCI Express Interface

Nytro Flash Module

SAS

PCI Express

RAID Controller

Flash ROM/

PSBRAM/

NVSRAM

32-Bit

Memory

Address/Data

Bus

Interface

SAS/SATA Devices

Internal Drive Bay

with

LSI SAS Expander

SAS/SATA Devices

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