Troubleshooting 5U Enclosures; Thermal Considerations; Usb Cli Port Connection; Fault Isolation Methodology - Lenovo ThinkSystem DS Series Hardware Installation And Maintenance Manual

Troubleshooting 5U enclosures

The table describes common problems that can occur with your enclosure system, together with possible solutions.
For all of the problems listed in
fault. See also
Table 22 5U alarm conditions
Status
PSU alert–loss of DC power from a single PSU
Cooling module fan failure
SBB I/O module detected PSU fault
PSU removed
Enclosure configuration error (VPD)
Low temperature warning
High temperature warning
Over-temperature alarm
Under-temperature alarm
I 2 C bus failure
Ops panel communication error (I
RAID error
SBB I/O module fault
SBB I/O module removed
Drive power control fault
Drive power control fault
Insufficient power available
For information about replacing modules, see

Thermal considerations

NOTE: Thermal sensors in the 5U enclosure and its components monitor the thermal health of the storage
system.
• Exceeding the limits of critical values will activate the over-temperature alarm.
• For information about 5U enclosure alarm notification, see

USB CLI port connection

DS Series controllers feature a CLI port employing a mini-USB Type B form factor. If you encounter problems
communicating with the port after cabling your computer to the USB device, you may need to either download a
device driver (Windows), or set appropriate parameters via an operating system command (Linux). See
device connection" (page 153)

Fault isolation methodology

DS Series and DS EXP/D3284 storage systems provide many ways to isolate faults. This section presents the basic
methodology used to locate faults within a storage system, and to identify the pertinent CRUs affected.
Table 22, the Module Fault LED on the Ops panel will light amber to indicate a
"5U enclosure Ops panel" (page
2 C)
for more information.
37). All alarms also report via SES.
Severity
Fault–loss of redundancy
Fault–loss of redundancy
Fault
Configuration error
Fault–critical
Warning
Warning
Fault–critical
Fault–critical
Fault–loss of redundancy
Fault–critical
Fault–critical
Fault–critical
Warning
Warning–no loss of drive power
Fault–critical: loss of drive power
Warning
"Module removal and replacement" (page
Table 22 (page
116).
105).
Troubleshooting 5U enclosures
"USB
105