Seven-Segment Numeric Display Leds - IBM System Storage DS5020 Installation, User's, And Maintenance Manual

Table 17. Rear controller LEDs, controls, and connectors (continued)
LED
Ethernet Link Activity
Drive Channel Port Bypass
(One LED per port)
Note: The drive channel
consists of two FC ports. This
LED indicates the drive port
bypass status of one of the
two FC ports that comprise a
drive channel. The other drive
channel port has its own
Drive Channel Port Bypass
LED.
Drive Channel Speed - L1
Drive Channel Speed - L2
The L1 and L2 LEDs for each Fibre Channel host and drive channel combine to
indicate the status and the operating speed of each host and drive channel.
Table 18. Host and drive channel LED definitions
L1
Off
On
Off
On

Seven-segment numeric display LEDs

The numeric display consists of two seven-segment LEDs that provide information
about enclosure identification and diagnostics. Figure 72 on page 110 shows the
numeric display and the diagnostic LED.
Normal Status
On - link established
Off - no link established
Flashing - activity
Off
(Also off if no SFP
connected)
See Table 18.
See Table 18.
L2 Definition
Off When both LEDs for a host or drive channel are off, this indicates one or more
of the following conditions:
v The host or drive channel ports are bad or the SFPs are faulty.
v An SFP module is inserted with no Fibre Channel cable attached.
Note: If the SFP is inserted in a drive port with no Fibre Channel attached,
the associated drive port bypassed LED will also be lit. In addition, the L1
and L2 LEDs will be unlit.
v No SFP module is inserted in one or both of the host or drive ports in the
channel.
Off The host is operating at 2 Gbps. The drive channel is operating at 1 Gbps.
Note: This pattern is not applicable in the drive port because the DS5020 does
not support 1 Gbps Fibre Channel speed.
On The host is operating at 4 Gbps. The drive channel is operating at 2 Gbps.
On The host is operating at 8 Gbps. The drive channel is operating at 4 Gbps.
Problem Status
Not applicable
On - No valid device detected
and port is bypassed
Chapter 4. Operating the storage subsystem
109