Adaptec 2420SA User Guide - Page 20
About the Adaptec 4805SAS, The Adaptec 4805SAS is a SAS RAID controller with these features
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Chapter 3: About Your RAID Controller ● 20 About the Adaptec 4805SAS The Adaptec 4805SAS is a SAS RAID controller with these features: Charge LED (for battery backup module) Alarm connector Two 4-wide internal Mode 0 Flash connector Mounting SAS connectors bracket Activity LED connector (top 2 left/right pins) 1 external SAS connector Battery connector PCIe connector Diag LED Activity LED Power LED Activity LED Phy 7 6 54 3 21 0 Back side of Controller Bus compatibility PCIe x8 I/O processor clock frequency 500 MHz Standard cache 128 MB DDR21 Maximum number of disk drives 8 (or up to 100 with expanders) External Connector mini-SAS 4x multilane (SFF-8470) Internal Connector 2x SAS 4x multilane (SFF-8484) Battery backup module Adaptec Battery Module 600 (sold separately-see page 17) Audible alarm Yes 1 256 MB also available Note: Although this controller has an onboard speaker, you can connect it to an internal speaker with these specifications: 3.0 V, 90.0 mA. The internal speaker is not required, as the onboard speaker volume is appropriate for most environments.