IBM 74Y4064 Handbook

Voltage
3.3 V
Form factor
Short, low-profile with standard size bracket
FC compatibility
2, 4, 8 Gigabit
Cables
Cables are the responsibility of the customer. Use multimode fibre optic cables with short-wave
lasers that adhere to the following specifications:
v OM3: Multimode 50/125 micron fibre, 2000 MHz x km bandwidth
v OM2: Multimode 50/125 micron fibre, 500 MHz x km bandwidth
v OM1: Multimode 62.5/125 micron fibre, 200 MHz x km bandwidth
Because core sizes are different, OM1 cables can only be connected to other OM1 cables. For best
results, OM2 cables should not be connected to OM3 cables. However, if an OM2 cable is
connected to an OM3 cable, the characteristics of the OM2 cable apply to the entire length of the
cables.
The following table shows the supported distances for the three different cable types at the three
different link speeds.
Table 17. Supported cable distances by link speed
Cable type 2.125 Gbps 4.25 Gbps 8.5 Gbps
OM3 0.5 m - 500 m 0.5 m - 380 m 0.5 m - 150 m
OM2 0.5 m - 300 m 0.5 m -150 m 0.5 m - 50 m
OM1 0.5 m - 150 m 0.5 m - 70 m 0.5 m - 21 m
Adapter LED
Green and yellow LEDs can be seen through openings in the adapter mounting bracket. Green indicates
firmware operation and yellow signifies port activity. Table 18 summarizes the link rate conditions. There
is a 1-second pause when the LED is off between each group of fast flashes (2, 3, or 4). Observe the LED
sequence for several seconds to be sure that you have correctly identified the state.
Table 18. Normal LED states
Green LED Yellow LED State
Slow flash Off Normal, link inactive or not started
On 2 fast flashes 2 Gbps link rate - normal, link active
On 3 fast flashes 4 Gbps link rate - normal, link active
On 4 fast flashes 8 Gbps link rate - normal, link active
Power-on self test (POST) conditions and results are summarized in Table 19. These states can be used to
identify abnormal states or problems. Follow the action to be taken for each condition.
Table 19. POST conditions and results
Green LED Yellow LED State Action to be taken
Off Off Wake-up failure (dead board) Perform AIX, Linuxor IBM i operating system
diagnostics.
Off On POST failure (dead board) Perform AIX, Linuxor IBM i operating system
diagnostics.
Off Slow blink Wake-up failure monitor Perform AIX, Linuxor IBM i operating system
diagnostics.
30 Managing PCIe adapters

IBM 74Y4064 Specifications

General

Brand	IBM
Model	74Y4064
Category	Adapter
Language	English