Table 9. Troubleshooting (continued)
Problem
indicator Component Possible cause Possible solutions
Hard disk drive is
not visible in the
DS Storage
Manager software
Several
components
Drive failure Replace the failed drive or drives.
SAS cable failed Replace the SAS cable.
RAID controller
failure
Replace RAID controller. See
Chapter 5, “Replacing
components,” on page 93 for
more information.
Midplane failure Replace the DS3500. Contact
your IBM technical-support
representative.
A drive has an
interface problem
with the ESM or
controller.
Replace the drive. See
Chapter 5, “Replacing
components,” on page 93 for
more information.
Incorrect firmware
version
Make sure that the DS3500 has
the correct firmware version. See
“Software and hardware
compatibility and upgrades” on
page 11.
In a dual-controller
storage subsystem,
one controller has
failed, and in the
drive channel that
originates from the
other (functioning)
controller, an ESM
has failed.
Replace the failed controller and
ESM. See Chapter 5, “Replacing
components,” on page 93 for
more information.
Storage expansion
enclosure is not
detected
Storage
subsystem
Expansion
enclosure is not
supported
Verify that the expansion unit is
supported by the DS3500 storage
subsystem.
SAS cable failed Replace the SAS cable.
Solving problems in the EXP3500 expansion enclosure
The following table contains troubleshooting information to help you solve some
basic problems that you might have with the EXP3500 expansion enclosure.
Table 10. Troubleshooting information
Component Problem indicator Possible cause Possible solutions
Hard disk drive Amber fault LED lit Drive failure Replace the failed hard disk drive. See Chapter 5,
“Replacing components,” on page 93 for more
information.
ESM Board failure Replace the failed ESM. See Chapter 5, “Replacing
components,” on page 93 for more information.
Front panel General machine
fault
A status or fault LED is lit. Check for amber LEDs
on components. See “Checking the LEDs” on page
73.
132 System Storage DS3500 and EXP3500: Installation, User’s, and Maintenance Guide