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Chapter 3: About Your RAID Controller ● 21
About the Adaptec 2420SA
The Adaptec 2420SA is a SATA II RAID controller with these features:
Note: A low-profile bracket is included with this controller. However, this controller may not fit in
all low-profile systems.
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
Mounting bracket
Mode 0 Flash connector
LED connector
I2C connector
SATA ports
0
1
3
2
PCI-X connector
Battery connector
Activity LED connector
PCI-X jumper
Charge LED
(for battery
backup module)
SUM Activity LED
0
1
2
3
Activity LED
Phy
Back side of Controller
IRQ LED
3,3V LED
Diag LEDs