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AIX6.1 hangs at starting kernel

  • 1.  AIX6.1 hangs at starting kernel

    Posted Thu July 01, 2010 10:10 AM

    Originally posted by: SystemAdmin


    System is a 9131-52A, with only one partition on this hardware. I was doing a migrations from AIX5300-06-12-0920 to AIX6.1 TL4 SP3. The migration appeared to finish without any issues but when the system booted up it reached the Welcome to AIX screen and the HMC showed "starting kernel" and there it sat. After 15 minutes I shutdown, brought it up in SMS selected the primary rootvg disk and normal boot, same results. Once more and selected the second disk of the rootvg, same results. I then shutdown, brought it up in SMS and selected the primary disk for the altinstall_rootvg and the system booted cleanly. Any help would be appreciated.
    #AIX-Forum


  • 2.  Re: AIX6.1 hangs at starting kernel

    Posted Thu July 01, 2010 11:08 AM

    Originally posted by: tony.evans


    Boot the partition into maintenance mode (using NIM or a DVD image), mount the root volume group and check the various boot logs to see what's happening at boot time.
    #AIX-Forum


  • 3.  Re: AIX6.1 hangs at starting kernel

    Posted Thu July 01, 2010 12:10 PM

    Originally posted by: bassemir


    How did you do the migration, from CD or from NIM?

    When you were able to boot from the alternate rootvg were you back on your original AIX 5.3 TL4? What is the output of lspv and what is the output of bootlist -m normal -o

    Not sure what you mean by primary rootvg disk. Is your rootvg a mirrored pair of hdisks?

    Maybe you can boot from the alternate rootvg and look at the boot logs on the "other rootvg disks" as Tony suggested.

    Rich
    #AIX-Forum


  • 4.  Re: AIX6.1 hangs at starting kernel

    Posted Thu September 09, 2010 09:51 PM

    Originally posted by: karunamandava


    I am also facing same problem AIX6.1 machine hangs at "starting kernel".
    After reboot LED screen is showing "starting kernel" message only.

    output of bootlist -m normal -o :

    hdisk0 blv=hd5

    output of lspv :

    hdisk0 00cd14ccab0a2c2a rootvg active
    hdisk1 00c6a33f03747df2 buildsvg
    #AIX-Forum


  • 5.  Re: AIX6.1 hangs at starting kernel

    Posted Fri September 10, 2010 09:24 AM

    Originally posted by: bassemir


    Things to check:
    Is the system you are installing it on an old system? What is the history, is this a migration or first installation? Is it at the latest firmware? Is there any chance the DVD is bad? Do you see any additional information in the boot log? Does this partition have sufficient memory assigned to it?

    I wonder how the original poster solved their problem....

    Rich
    #AIX-Forum


  • 6.  Re: AIX6.1 hangs at starting kernel

    Posted Fri September 10, 2010 11:26 AM

    Originally posted by: karunamandava


    Thanks for response actually i don't know much on AIX

    This machine is not migrated one this is fresh installation of 6.1 only.

    I installed only "bos" file sets from 6100-00-10-0939 service pack fix

    This is the OS before updating service pack
    #oslevel -s
    6100-00-00-0000
    After updating service pack it asked reboot and system came up without issue.
    #oslevel -s
    6100-00-10-0939

    we build our binaries with ACE and compiled and rebooted machine. After reboot machine is not coming up it is showing "kernel starting" message on LED screen

    Now i booted with CD in maintenance mode can you tell how to transfer boot log files to other machine.
    #AIX-Forum


  • 7.  Re: AIX6.1 hangs at starting kernel

    Posted Fri September 10, 2010 03:57 PM

    Originally posted by: bassemir


    So the system booted AIX 6.1 without a problem after installing SP 1. Your problem started after you compiled your binaries? I am not sure I understand what you mean by that. Did you install some additional code to the system?

    If you back out your change will the system boot? Is that an option to even back out the change?

    Rich
    #AIX-Forum


  • 8.  Re: AIX6.1 hangs at starting kernel

    Posted Fri September 10, 2010 05:46 PM

    Originally posted by: karunamandava


    can you help me to remove sp1
    #AIX-Forum


  • 9.  Re: AIX6.1 hangs at starting kernel

    Posted Fri September 10, 2010 07:35 PM

    Originally posted by: dukessd


    Simple, just restore the mksysb you took before the update.
    #AIX-Forum


  • 10.  Re: AIX6.1 hangs at starting kernel

    Posted Wed September 15, 2010 02:46 PM

    Originally posted by: cdarsey


    Just wandering if you got anywhere with this? I am on the phone with IBM with the same issue and not having much luck. I have another system doing the same thing and will be attempting to upgrade again this weekend. Hoping to get an answer.
    #AIX-Forum


  • 11.  Re: AIX6.1 hangs at starting kernel

    Posted Wed September 15, 2010 03:14 PM

    Originally posted by: bassemir


    Sorry cdarsey.... I was confused why you wanted to remove SP1 if it was booting with SP1 installed. At least that was the way I read your post. I did not know what advice to give because I still did not understand what you meant when you said

    "we build our binaries with ACE and compiled and rebooted machine. After reboot machine is not coming up it is showing "kernel starting" message on LED screen"

    It seemed to me that step, what ever it was, is what introduced the boot problem. But since I did not understand what you did, all I could suggest was to back that change off and see if you are able to boot again.

    The bottom line is that you are in contact with IBM and I would continue to work the problem through that channel. I obviously do not know enough about what you are doing to provide any additional suggestions.

    Rich
    #AIX-Forum


  • 12.  Re: AIX6.1 hangs at starting kernel

    Posted Wed September 15, 2010 03:21 PM

    Originally posted by: cdarsey


    No, hang on. I was replying to the very first post. I upgraded an AIX5.3 lpar to AIX6.1 TL4 SP3. On the first bootup, it stops at Starting Kernel, it will not boot up and has not ever booted up. I think this thread sortta went off on another tangent.
    #AIX-Forum


  • 13.  Re: AIX6.1 hangs at starting kernel

    Posted Wed September 15, 2010 03:48 PM

    Originally posted by: bassemir


    Yep, you are right I was reading one of the earlier posts and got you confused with earlier users. My mistake. Did you do your update from AIX 5.3 to 6.1 via a dvd migration installation or with an alternate disk installation approach? Is this installation on a partition using virtual resources (vio server) or all dedicated adapters? Did you happen to notice any errpt errors prior to the migration? What hardware and firmware level are you using? I have more questions than answers.... actually, if you have IBM support involved I would work the problem through them. I obviously don't know enough about the environment to offer any suggestions.

    Rich
    #AIX-Forum