Table 18. Rear LEDs, controls, and connectors
Number
LED
Normal Status
Problem Status
1
ESM Power
On
Off
2
ESM Fault
Off
On
3
ESM Service Action
Allowed (OK to Remove)
Off
On
4
ESM Port 1 In Bypass
(This port is labeled 1A)
Off - Cable connected
On - No cable connected
On, when a fibre channel
cable is connected
5
ESM Ports 1 & 2
2 or 4 Gbps Data Rate
One LED is lit if 2 Gbps
Both LEDs are lit if 4
Gbps
N/A
6
ESM Port 2 In Bypass
(This port is labeled 1B)
Off - Cable connected
On - No cable connected
On, when a fibre channel
cable is connected
7
ESM Port 3 In Bypass
(This port is labeled 2A)
This port is reserved for
future use
On, flashing for 30
seconds
8
ESM Ports 3 & 4
2 or 4 Gbps data rate
One LED is lit if 2 Gbps
Both LEDs are lit if 4
Gbps
N/A
9
ESM Port 4 In Bypass
(This port is labeled 2B)
This port is reserved for
future use.
On, flashing for 30
seconds
Seven-segment numeric display
The numeric display consists of two seven-segment LEDs that provide information
about enclosure identification and diagnostics. Figure 32 on page 55 shows the
numeric display and the diagnostic LED.
A
ESM
B
ESM
exp81022
4
5
6
2
3
1
7
8
9
4
6
5
3
2
1
7
9
8
Figure 31. Rear LEDs, controls, and connectors
54
IBM System Storage DS3950 EXP395 Storage Expansion Enclosure: Installation, User’s, and Maintenance Guide
Summary of Contents for DS3950
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