IBM TotalStorage DS4300 Installation And User Manual page 132

Table 15. Storage server troubleshooting (continued)
Problem
indicator
One or more
green LEDs off
102
IBM TotalStorage DS4300 Fibre Channel Storage Server: Installation and User's Guide
Component Possible cause
Power supply Power cord
CRUs unplugged or
switches turned
off
All drive CRUs Midplane failure
Front panel Power supply
problem
Hardware failure
Battery Battery failure
Cache active The cache is
disabled
The cache
memory has
failed
The cache
battery has failed
There is no I/O
Host loop Host or switch is
off or has failed
Fibre-channel
cable has failed
SFP has failed
RAID controller
has no power or
has failed
Possible solutions
Make sure that the power cord is
plugged in and the power-supply
switches are turned on.
Have the midplane replaced
(service technician only).
Make sure that the cords are
plugged in and power supplies
are turned on.
If any other LEDs are on, replace
the midplane (service technician
only).
Replace the battery.
Use the storage-management
software to enable the logical
drive read and write cache
settings.
Replace the RAID controller.
Use the storage-management
software to check and replace
the battery.
Generate I/O.
Check if host or switch is on.
Replace attached devices that
have failed.
Ensure that the fibre-channel
cables are undamaged and
properly connected.
Ensure SFP is seated properly;
replace SFP.
Ensure that the unit is powered
on. Replace RAID controller.