Patch Information; Functionality Issues; Known Issues; Psu Does Not Automatically Turn On Again After Power Failure - Sun Microsystems SPARC Enterprise T5120 Product Notes

Note – The use of the External I/O Expansion Unit to connect the host server to an
external boot disk drive is not supported.

Patch Information

There are currently no patches that are specific for the External I/O Expansion Unit.
Patch requirements can be revised at any time. For the availability of patches, see
"Technical Support" on page vi.

Functionality Issues

This section lists known issues for the External I/O Expansion Unit.
Note – Additional issues regarding the External I/O Expansion Unit might be
found in the software release notes for your operating system or the hardware
product notes for your server.

Known Issues

PSU Does Not Automatically Turn On Again After Power
Failure
A PSU might not automatically turn on again after an interruption of AC power that
lasts at least 55 seconds. This failure can occur if the AC cord is temporarily
unplugged, or if the AC circuit temporarily loses input AC power. Note that turning
the PSU AC switch off and on manually does not cause this failure. When AC power
is restored, on the front of the PSU the AC LED will light, but the OK LED will remain
off.
The workaround is to turn off the PSU AC switch for approximately 15 seconds,
then turn the PSU AC switch on again. The green OK LED and the green AC LED on
the front of the PSU should light up.
2 External I/O Expansion Unit Product Notes for SPARC Enterprise T5xxx Servers • March 2010