Loading ...

AP7921 shutdown & throwing errors. | Racks, Rack Accessories, & Cooling

Home » Spaces » Racks, Rack Accessories, & Cooling » discussion » General » AP7921 shutdown & throwing errors.
Racks, Rack Accessories, & Cooling

Leave Space :

Are you sure you want to leave this space?

Join this space:

Join this space?

Add a new tab

Add a hyperlink to the space navigation. You can link to internal or external web pages. Enter the Tab name and Tab URL. Upload or choose an icon. Then click Save.

The name that will appear in the space navigation.
The url can point to an internal or external web page.
Login to follow, share, and participate in this space.
Not a member?Join now
Posted in: General

AP7921 shutdown & throwing errors.

Subscribe to RSS
  • quincy.hartgers

    Dear reader,

    Our APC is throwing the following errors:

    11/30/2011 11:10:00 Switched Rack PDU: Communications lost.
    11/30/2011 11:09:58 Switched Rack PDU: Communications established.
    11/30/2011 11:09:58 Switched Rack PDU: Communications lost.
    11/30/2011 11:09:56 Switched Rack PDU: Communications established.
    11/30/2011 11:09:46 System: Network service started. System IP is xxx.xxx.xxx.24 from manually configured settings.
    11/30/2011 11:09:46 System: Warmstart.
    11/30/2011 11:09:30 System: Restarting. Stack overrun - Task 10.Stack overrun.
    11/30/2011 10:40:32 Switched Rack PDU: Communications established.
    11/30/2011 10:40:32 Switched Rack PDU: Communications lost.

    Please ignore the datetimestamps; these are incorrect. Seems this either was reset or never set at all by my predecessor. Anyway; the PDU suddenly stopped functioning a couple of days ago causing all outlets to die (and subsequently, the attached servers). So I went searching in the event log of the PDU and, apart from the above, found nothing to go on. All I could find was this (seemingly unrelated to events):

    11/30/2011      17:21:26      2.0      2.4      2.0
    11/30/2011      17:11:26      2.1      3.0      0.0
    11/30/2011      16:59:33                      
    11/30/2011      16:49:33      0.0      0.0      0.0
    11/30/2011      16:39:33      0.0      0.0      0.0
    ...
    11/30/2011      11:49:33      0.0      0.0      0.0
    11/30/2011      11:39:33      0.0      0.0      0.0
    11/30/2011      11:29:33      0.0      0.0      0.0
    11/30/2011      11:19:33      0.0      2.1      0.0
    11/30/2011      11:05:05      2.0      2.2      2.0
    11/30/2011      10:55:05      2.1      2.2      2.0
    11/30/2011      10:45:05      2.1      2.1      0.0
    11/30/2011      10:35:05      2.0      2.2      2.0 

    Regardless, I did a bit of searching and concluded that there's three ways to go for me:

    1) 30-second power cycle on the PDU;

    2) Try to update the firmware;

    3) Replace the PDUs (obsolete model).

    Is this correct? Am I overlooking anything?

    In regards to option (2); where can I grab the most recent firmware for this specific model?

    Thanks a lot --

    Model Number:     AP7921
    Serial Number:     ZA0716000626
    Hardware Revision:     B2
    Manufacture Date:     04/21/2007
    MAC Address:     00 C0 B7 30 17 AF
    Management Uptime:     0 Days 0 Hours 7 Minutes

    # APC Module
    Name:     rpdu
    Version:     v3.3.3
    Date:     01/05/2007
    Time:     14:56:33

    # APC OS
    Name:     aos
    Version:     v3.3.4
    Date:     01/05/2007
    Time:     14:23:44

  • B-DoubleE

    Hi Quincy,

    The symptoms described sound like the starting of a failure of one or both of the internal power supplies. A switched PDU has multiple internal power supplies so if the network card reboots (as evident by the warmstart in the event log) the outlets will remain on. If there is an issue with the power supplies that can lead to issues like the one you explained. 

    This PDU is over 12 years old (and the expected life of a PDU is 8-10 years), so while trying to upgrade firmware and powercycle the unit are valid steps, I think a replacement is going to be your best option.

Page 1 of 1 (2 items)
Choose your language:  
powered by Communifire
Version 6.0.7263.6123