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    <div class="moz-cite-prefix">On 05/07/18 12:23, Ravi Sankar wrote:<br>
    </div>
    <blockquote type="cite"
cite="mid:CAJyymtVVXwypzK4gtw97PQKU5Bd14unsYi51E5NzbQLYfJTfPQ@mail.gmail.com">
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        <span
style="font-size:12.8px;text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">Dear
          Support,</span>
        <div dir="auto"
style="font-size:12.8px;text-decoration-style:initial;text-decoration-color:initial"><br>
        </div>
        <div dir="auto"
style="font-size:12.8px;text-decoration-style:initial;text-decoration-color:initial">I
          would like to introduce myself,Ravi,working as DBA,located in
          Singapore.</div>
        <div dir="auto"
style="font-size:12.8px;text-decoration-style:initial;text-decoration-color:initial">We
          recently hit an issue with DRBD after upgrade kernel,unable to
          mount DRBD.</div>
        <div dir="auto"
style="font-size:12.8px;text-decoration-style:initial;text-decoration-color:initial"><br>
        </div>
        <div dir="auto"
style="font-size:12.8px;text-decoration-style:initial;text-decoration-color:initial">Kindly
          refer below details of our env.</div>
        <div dir="auto"
style="font-size:12.8px;text-decoration-style:initial;text-decoration-color:initial"><br>
        </div>
        <div dir="auto"
style="font-size:12.8px;text-decoration-style:initial;text-decoration-color:initial">OS-Rhel
          6.2,kernel 2.6.32-220</div>
        <div
style="font-size:12.8px;text-decoration-style:initial;text-decoration-color:initial">Kernel
          Upgrade to  <span style="font-size:12.8px">2.6.32-754</span></div>
        <div dir="auto"
style="font-size:12.8px;text-decoration-style:initial;text-decoration-color:initial">Current
          DRBD version-8.3.12</div>
        <div dir="auto"
style="font-size:12.8px;text-decoration-style:initial;text-decoration-color:initial"><br>
        </div>
        <div dir="auto"
style="font-size:12.8px;text-decoration-style:initial;text-decoration-color:initial">Based
          on the above info,can kindly shed some light?.Please advice
          any compatibilty issue with Kernel update?.</div>
        <div dir="auto"
style="font-size:12.8px;text-decoration-style:initial;text-decoration-color:initial">After
          switch back to original kernel version,we were able to bring
          up DRBD.</div>
      </div>
    </blockquote>
    <br>
    Well, first, good news for updating into the 21st century ;-)<br>
    <br>
    Where did you get your drbd packages from? Or did you install from
    source? Depending on how you installed, the solution will be
    different.<br>
    <br>
    If it came from the ELRepo yum repository then you would have a
    package installed called something like <br>
    <br>
    kmod-drbd83.x86_64                  
    8.3.16-3.el6.elrepo                     elrepo<br>
    <br>
    though in your case it would be considerably older than that. If you
    have that installed now then re-enable the ELRepo repo and re-run
    yum update to pick up their latest build.<br>
    <br>
    If you built from source then you will need to rebuild against the
    latest kernel-{headers/devel} packages. Be aware that there may be
    code changes on the DRBD source side required in order to compile
    against the 6.10 kernels so you should probably update to the latest
    8.3 source and build from that.<br>
    <br>
    You will also find that ELRepo offer kmod-drbd84 packages that are
    far more up to date - 8.3 has had no maintenance for several years
    now I think. Going from 8.3 to 8.4 is not difficult but there are
    some config file changes that may need to be made to get there.<br>
    <br>
    Linbit themselves also have packaged versions of DRBD for their
    paying customers and you may be using those now and will need to
    update.<br>
    <br>
    <br>
    Trevor<br>
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