IBM Midrange System DS4000 Series

80 IBM Midrange System Storage Hardware Guide
򐂰 Power LED (green)
– On: The subsystem is powered on.
– Off: The subsystem is powered off.
RAID controller LEDs
There are LEDs on the RAID controllers that serve as indicators of key information (refer to
Figure 3-58, Table 3-5, and Table 3-6 for LED status details).
Figure 3-58 DS5020 RAID controller LEDs
Host SFP LEDs
򐂰 LED #0 (green): Host channel speed L1
򐂰 LED #1 (green): Host channel speed L2
Table 3-5 FC host SFP status LED definitions
Disk Channel SFPs LEDs
Table 3-6 FC disk expansion port SFP LED definitions
LED#0 LED#1 Port status
OFF OFF Link down
ON OFF Link rate 2 Gbps
OFF ON Link rate 4 Gbps
ON ON Link rate 8 Gbps
LED#0 LED#1 Port status
OFF OFF Link down
ON OFF Reserved
OFF ON Link rate 2 Gbps
ON ON Link rate 4 Gbps
HOST BOARD
PORTS
BBU
CRU
Host 1 SFP
LED0 LED1
Host 2 SFP
LED0 LED1
EXP 0 SFP
Bypass
Encoded Rate LEDs
LED0 LED1
EXP 1 SFP
Bypass
Ready to remove (blue)
Fault (amber)
Cache active (green)
Seven segment display
Gb ETH 0
Link rate
Activity
Gb ETH 1
Debug
port