208 day reboot bug
anthonyv 2000004B9K Comments (8) Visits (29126)
It is ironic that only days after I wrote that 497 is the IT number of the beast, I learn that Linux has another unfortunate number: 208.
The reason for this is a defect in the internal Linux kernel used in recent firmware levels of SVC, Storwize V7000 and Storwize V7000 Unified nodes. This defect will cause each node to reboot after 208 days of uptime. This issue exists in unfixed versions of the 6.2 and 6.3 level of firmware, so a large number of users are going to need to take some action on this (except those who are still on a 4.x, 5.x, 6.0 or 6.1 release). If you have done a code update after June 2011, then you are probably affected. This means that if you are an IBM client you need to read this alert now and determine how far you are into that 208 day period. If you are an IBMer or an IBM Business Partner, you need to make sure your clients are aware of this issue, though hopefully they have signed up for IBM My Notifications and have already been notified by e-mail.
In short what needs to happen is that you must:
To give you an example of the process, my lab machine is on software version 126.96.36.199 which you can see in the screen capture below. So when I check the table in the alert, I see that version 188.8.131.52 was made available on January 24, 2012, which means the 208 day period cannot possibly end before August 19, 2012.
Regardless, I need to know the uptime of my nodes, so I download the Software Upgrade Test Utility (in case you have an older copy, we need at least version 7.9) and run it using the Upgrade Wizard (NOTE! We are NOT updating anything here, just checking):
I Launch the Upgrade Wizard, use it to upload the tool and follow the prompts to run it, so that I get to see the output of that tool. The output in this example shows the uptime of each node is 56 days, so I have a maximum of 152 days remaining before I have to take any action. At this point I select Cancel. You can run this tool as often as you like to keep checking uptime.
Note if you are on 6.1 or 6.2 code you may see a timeout error when running the tool, especially for the first time. If you do see an error, please follow the instructions in the section titled "When running the the upgrade test utility v7.5 or later on Storwize V7000 v6.1 or v6.2" at the Test Utility download site.
As per the Alert:
*** Updated April 4, 2012 with links to fix levels ***
If you have any questions or need help, please reach out to your IBM support team or leave me a comment or a tweet.
*** April 10: The IBM Web Alert has been updated with new information on what to do if your uptime has actually gone past 208 days without a reboot. In short you still need to take action. Please read the updated alert and follow the instructions given there. ***