Asset ID:	1-73-1020830.1
Update Date:	2010-08-27
Keywords:

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Solution Type  FAB (standard) Sure

Solution  1020830.1 :   Netra ct900 running SunVTS should modify fan speed.  


PreviouslyPublishedAs
265650

Bug Id
<SUNBUG: 6852129>

Product
Sun Netra CT 900 Server

Date of Resolved Release
12-Aug-2009

ct900 can overheat if many blades running SunVTS (see details below).

Impact

The Netra ct900 can overheat if many internal cp3260 blades run SunVTS.

Contributing Factors

Netra ct900 with cp3260 blades running SunVTS.

Symptoms

If a Netra ct900 with cp3260 blades runs SunVTS for an extended period of time, it could overheat due to higher than normal resource utilization.  This issue is aggravated if the system is located at high altitudes (above 3000 feet or 915 meters), and is aggravated on a fully loaded chassis and blades with maximum memory.

Root Cause

SunVTS places a higher than normal resource load on the system, which can cause blades to have a higher than normal temperature.  This can cause cp3260s to operate above their specified temperature limit.

Corrective Action

Workaround:

See Resolution section below.

Resolution:

Modify the default fan settings ONLY while running SunVTS by commenting out the following line if ShMM file /etc/shelfman.conf with a # in collumn 1 and then reboot the ShMM:

   CARRIER_OPTIONS = SUNCT900

This setting is to be changed back after SunVTS completes and the ShMM rebooted.


References:

  Radiance ID: 71141190

For information about FAB documents, its release processes, implementation strategies and billing information, go to the following URL:

• http://tns.central/fab

For Sun Authorized Service Providers go to:

• http://tns.central/SPE/fab/

In addition to the above you may email:

• [email protected]

Internal Contributor/submitter
[email protected]

Internal Eng Responsible Engineer
[email protected] Responsible Manager: [email protected]

Internal Services Knowledge Engineer
[email protected]

Internal Eng Business Unit Group
SSG NSN (Netra Systems and Networking)

Internal Sun Alert & FAB Admin Info
10-Aug-2009: Completed draft and sent to Extended Review.
12-Aug-2009: No feedback from Ext Rvw - sending to Publish.
19-Nov-2009: Corrected Product Name to swoRDFish inconsistency.


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