Adaptec 2420SA User Guide - Page 21
About the Adaptec 2420SA, The Adaptec 2420SA is a SATA II RAID controller with these features - jumpers
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Page 21 highlights
Chapter 3: About Your RAID Controller ● 21 About the Adaptec 2420SA The Adaptec 2420SA is a SATA II RAID controller with these features: Activity LED connector SATA ports 01 23 Mode 0 Flash connector LED connector Battery connector I2C connector PCI-X jumper PCI-X connector Mounting bracket SUM Activity LED Activity LED Phy 3 21 0 3,3V LED IRQ LED Charge LED (for battery backup module) Back side of Controller Diag LEDs Bus compatibility PCI-X, 3.3 V Bus width 64-bit Bus speed 133 MHz Standard cache 256 MB Maximum number of disk drives 4 Internal Connector 4x SATA connector Battery backup module Adaptec Battery Module 500 (sold separately-see page 17) Audible alarm Yes Note: A low-profile bracket is included with this controller. However, this controller may not fit in all low-profile systems.