Chapter 3: About Your RAID Controller ● 33
About the Adaptec RAID 31205
The Adaptec RAID 31205 is a SAS RAID controller with these features:
Form Factor Half-size
Bus compatibility PCIe
PCIe bus width x8
PCIe bus speed 2.5 Gb/s
Phys (Unified Serial Ports) 12
Standard cache 256 MB DDR2
Connectors, internal 3 mini-SAS x4 (SFF-8087)
Maximum number of disk drives 12 (or up to 100 with expanders)
Enclosure Support I2C and SGPIO
Onboard speaker Yes
Battery Backup Module Adaptec Battery Module 800 (sold separately—see page 19)
Mounting bracket
PCIe x8 connector
3 internal
SAS connectors
Battery connector
Activity LED Phys and connectors
F
E
Mode 0 Flash connector
Alarm connector
Aggregate LED connectors
C
B
A
Activity LED Phys and connectors
Activity LED Phys and connectors
F = CN2
E = CN1, CN0
Aggregate LED connectors
C = CN2
B = CN1
A = CN0
CN0
CN1
CN2
I2C connector for CN0
I2C connector for CN1
I2C connector for CN2
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