Troubleshooting 5U enclosures 105
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 Table 22, the Module Fault LED on the Ops panel will light amber to indicate a
fault. See also “5U enclosure Ops panel” (page 37). All alarms also report via SES.
For information about replacing modules, see “Module removal and replacement” (page 116).
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 Table 22 (page 105).
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 “USB
device connection” (page 153) for more information.
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 5U alarm conditions
Status Severity
PSU alert–loss of DC power from a single PSU Fault–loss of redundancy
Cooling module fan failure Fault–loss of redundancy
SBB I/O module detected PSU fault Fault
PSU removed Configuration error
Enclosure configuration error (VPD) Fault–critical
Low temperature warning Warning
High temperature warning Warning
Over-temperature alarm Fault–critical
Under-temperature alarm Fault–critical
I
2
C bus failure Fault–loss of redundancy
Ops panel communication error (I
2
C) Fault–critical
RAID error Fault–critical
SBB I/O module fault Fault–critical
SBB I/O module removed Warning
Drive power control fault Warning–no loss of drive power
Drive power control fault Fault–critical: loss of drive power
Insufficient power available Warning
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