Solaris Troubleshooting – System Panics, Hangs and Crashes


I have started ( aka in 2009 as my own personal reference blog, and later sometime i have realized that my leanings might be helpful for other unixadmins if I manage my knowledge-base in more user friendly format. And the result is today's' You can connect me at -

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12 Responses

  1. Naresh says:

    hi Ram

    I would like to know difference between “SERVER DOWN and SERVER HANG”


    • Gurkulindia says:

      @Naresh – Server Hang is nothing but “server is still in powered on state but not responding to any user requests. and mainly causes due to CPU / MEM / Network / IO overload. Server down means Operating system completely down to powered off state, and mainly causes due to hardware(CPU/MEM/System Board ..etc) failures. And most of the times you have to login to console, to check whether it is server hang or server down.

  2. santhu says:

    pkginfo: ERROR: cannot start pkgserv daemon: Bad file number in solaris 10?
    what could be the root cause of this errorr ??

  3. santhu says:

    prtdiag: failed to open SMBIOS: System does not export an SMBIOS table?

    What prerequisites should i add to run prtdiag in x86 machine??

    thanks in advance to who ever replise to the above two querys..

  4. Shahul says:

    Hello Experts….One of our X86 server running Solaris 10 crashed and Vendor suggested for OS restore…Could some help me on the steps or share a doc please…

  5. Ramdev says:

    Sahul, what level of server backup you have and what backup it is?

  6. santhu says:

    Hi Ram , could u please tell the root cause of this error and solution for it pkginfo: ERROR: cannot start pkgserv daemon: Bad file number in solaris 10?
    what could be the root cause of this error???

  7. praveen says:

    HI Ramdev,
    Could you please describe what is the difference between
    unix.0 and vmcore.0 in crash directory?

  8. Ramdev says:

    Hi Praveen, unix.0 is the dump file for solaris kernel data where as vmcore.0 is the dump of memory data.

  9. Sanket says:


    How to restore the server from failed OS patching scenario ?

  10. satya says:

    Hi Ram,

    The server is unresponsive and it is hang state. is any way to collect crash dump using putty ( I connected to console via putty), how can i generate crash dump using console putty.
    i am not at server room to use serial port.
    i want to collect crash dump remotely using console putty when server hangs. please suggest.
    Thanks in advance.

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