Asset ID:	1-71-1004707.1
Update Date:	2010-07-06
Keywords:

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Solution Type  Technical Instruction Sure

Solution  1004707.1 :   Sun Fire[TM] V1280/Sun Fire[TM] E2900/Netra[TM] 1280: One fan always runs  


PreviouslyPublishedAs
206533

Description
One fan will always be running when there is power available to the
system, even if the system if turned off.

Steps to Follow
You may notice that if a Sun Fire[TM] V1280, Sun Fire[TM] E2900, or Netra[TM] 1280
system is plugged in, but not turned on, that a fan is spinning in the
front fan tray.

When the system is plugged in, an auxiliary power bus will immediately be
active to supply power to components in the system such as the System
Controller.
This bus will also provide power for Fan 3 on the front of the system to start
spinning in order to provide airflow to keep components such as the
System Controller cool.  If Fan 3 fails, Fan 1 will be activated in its place
until Fan 3 is restored.  One of these two fans must be running or you will
not be allowed to continue to power on the rest of the system.

Product
Sun Fire V1280 Server
Netra 1280 Server
Sun Fire E2900 Server

Internal Comments
Audited/updated 11/19/09 - roberto.morandi@Sun.COM, ESG Content Team


1280, fans, running, V1280, E2900, 2900
Previously Published As
70539

Change History
Date: 2005-11-30
User Name: 25440
Action: Approved
Comment:
Publishing.
Version: 3
Date: 2005-11-30
User Name: 25440
Action: Accept
Comment:
Version: 0
Date: 2005-11-30
User Name: 114416
Action: Approved
Comment: ready and needs to published
Version: 0
Product_uuid
6a74b2f9-bbd8-4b2c-870d-b6b73d6e224f|Sun Fire V1280 Server
e41a7084-3dbf-472d-918b-efb50dcbc220|Netra 1280 Server
63ff680d-0598-11d8-84cb-080020a9ed93|Sun Fire E2900 Server

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