4
Fan fault
Number of power supplies shipped in a DS4243 disk shelf
The type of the disk drives used in DS4243 disk shelves determines the number of power supplies
required to ensure proper cooling, airflow, and power.
•
DS4243 disk shelves that have solid-state disks (SSDs), or disk drives that are slower than
10,000 RPM, require two power supplies and two power supply blanks to fill the four power
supply bays in the disk shelf.
These disk shelves require two power outlets.
•
DS4243 disk shelves that have disk drives that are 10,000 RPM or faster—typically SAS disk
drives—require four power supplies in the disk shelf.
These disk shelves require four power outlets.
What the power supply LEDs mean
You can determine the status of the power supplies by understanding the meaning of the power
supply LEDs when they are illuminated.
Note: The following table describes the LED behavior when the disk shelf is not in H0 shelf
mode. The
How the H0 shelf mode and LEDs work section has information about the H0 shelf
mode.
Icon
LED
Color
When illuminated
PSU OK
Green
Power supply is functioning normally.
Note: The other three LEDs are not illuminated.
Fan fault
Amber
An error occurred with the function of the fan.
AC fault
Amber
The power supply is not turned on or the AC power cord is not plugged in.
DC fault
Amber
The power supply cannot provide DC voltage to the disk shelf within margin.
Power supply console error messages
When an SES element on a power supply fails, an error message appears on your system console
and the fault LED on the failed power supply illuminates.
ses.status.psError
Description
This message occurs when the system detects a critical condition in the indicated storage
disk shelf power supply.
The power supply might fail.
Corrective action
1. Verify that power input to the disk shelf is correct.
If separate events of this type are reported simultaneously, the common power
distribution point might be at fault.
2. If the disk shelf is in a system cabinet, verify that the power distribution unit is ON and
functioning properly.
Make sure that the disk shelf power cords are fully inserted and secured, the supply is
fully seated and secured, and the supply is switched ON.
DS4243, DS2246, DS4486, and DS4246 Installation and Service Guide
44
Monitoring disk shelf components
