IBM DS4800 User, Installation And Maintenance Manual page 137

Table 19. RAID controller LEDs (continued)
Legend LED
6 Drive 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
made up a drive
channel. The LED
marked 3 shows
the status of the
other port.
7 Service Action
Allowed
8 Needs Attention
9 Cache Active
10 Ethernet Link
Speed
Color Normal Status
Amber LED Off
Blue LED Off
Amber LED Off
Green LED On = Data in
cache
Off = No data in
cache
Green LED Off = 10BASE-T
On = 100BASE-T
Problem Status Procedure
On = Bypass
problem
v An SFP module
is inserted in the
port and the
connected fibre
channel is either
absent or not
properly
connected
v The storage
expansion
enclosure
connected to this
port is not
powered on
v There is a
problem with the
fibre channel
connection
between this port
and the fibre
channel port of
the connected
ESM in the
storage
expansion
enclosure.
On = Safe to "Replacing a controller"
remove on page 137
On = Controller "Troubleshooting the
needs attention storage subsystem" on
page 109
There is a controller
fault or a controller
is off-line.
Not applicable
Not applicable
Chapter 4. Operating the storage subsystem
115