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LSI Nytro MegaRAID Application Acceleration Card User Guide

August 2012

Nytro MegaRAID Card Characteristics

Flash Memory Capacity

Chapter 3: Nytro MegaRAID Card Characteristics

All of the Nytro MegaRAID cards contain the same connectors and headers. Therefore, there is only one board

illustration and description given in this chapter.

3.1 Flash Memory Capacity

The differences between the Nytro MegaRAID cards are the amount of Flash memory as shown in the following table.

3.2 LEDs

The Nytro MegaRAID card contain two surface mounted LEDs and two headers for LEDs.

3.2.1 Dirty Cache LED Header (J1)

J1 is an optional two-pin header for connecting an LED to indicate a write command is pending. This LED is know as

Write Pending LED. Use this LED with the write-back cache feature. The dirty cache signal is driven by GPIO(5) of the

LSISAS2208. The table below shows how to connect an LED to the J1 header.

Table 2 Nytro MegaRAID Board Sizes

Nytro MegaRAID Card Flash Capacity

Nytro MegaRAID8100-4i 128 GB

Nytro MegaRAID8110-4i 256 GB

Nytro MegaRAID8120-4i 1 TB

Table 3 Dirty Cache Header J1

Pin # Name Description

1 DIRTY_PU Anode of LED

2 DIRTY Cathode of LED

Illustration of how to connect the LED

1 2 ... 9 10 11 12 13 14 15 16 17 18 19 ... 22 23

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