The h/w monitor on the Sun Java Workstation W1100z/W2100z may incorrectly detect "0 RPM" causing the system to shut down. This may result in an unnecessary fan replacement.

This issue can occur on the following platforms:

• Sun Java Workstation W1100z/W2100z with bios R01B3S1 (found on supplemental CD 1.3) or bios R01B4S0 (found on supplemental CD 2.0) and without bios R01B4S3 (found on the Supplemental CD 2.2)

Note: The bios R01B4S2 (found on supplemental CD 2.1), address the false fan readings, however may result in a small amount of Chassis fans (370-7716) to cause all the system fans to "pulse". During this "pulse", mouse and keyboard activity may become sluggish.

Both the false fan readings and the "pulse" issue are addressed with bios R01B4S3 (found on the Supplemental CD 2.2).

Should the described issue occur, the system will shut down at initial power-on during SCSI adapter initialization. The Fault light on the front bezel will be illuminated, as well as the rear fan fault led on the mother board. The "dmilog" will show an entry similar to the following:

    10/29/2005  15:36:12   System rear fan1 fault

There is no workaround. Please see the "Resolution" section below.

This issue is addressed on the following platforms:

• Sun Java Workstation W1100z/W2100z with bios R01B4S3 or later (Bios R01B4S3 can be found on the Supplemental CD 2.2)

Sun Java Workstation W1100z/2100z supplemental CD 2.2 or later is available for download at:

• http://www.sun.com/desktop/workstation/w1100z/downloads.html

To update the bios, do the following:

1. Insert the Supplemental cd 2.2 or higher.

2. Reboot the workstation.

3. Select option 2 from the Supplemental CD menu (Flash BIOS).

3(a). Enter "Y" to confirm the flashing of the bios.

4. After flash is complete press <Any key> to reboot the workstation.

5. Upon reboot the following error will appear:

    0270 real time clock error
    0251 System CMOS checksum bad

5(a). Press <f2> to enter bios.

6. Press <f9> to load Default bios settings.

7. Press <f10> to save and exit.

• Updated Resolution section

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