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    <p>I don't think you use the --servicenode option when formatting an
      mgs-only disk, or the --fsname option. Neither of those apply for
      an mgs-only with multiple filesystems.<br>
    </p>
    <p>My command for a zfs backed mgs was:</p>
    <p><i><b>mkfs.lustre --mgs --backfstype=zfs MGT/mgt</b></i><br>
    </p>
    <p>Then I created 2 different sets of OSTs/MDTs with different
      fsnames, but the same mgsnode.</p>
    <p>Brian Andrus<br>
    </p>
    <br>
    <div class="moz-cite-prefix">On 11/1/2017 6:50 PM, Parag Khuraswar
      wrote:<br>
    </div>
    <blockquote type="cite"
      cite="mid:000001d3537d$07719ce0$1654d6a0$@citilindia.com">
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        <p class="MsoNormal"><span
style="font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Hi
            Raj,<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D">But
            I have two file system. And I think one mgt can be used for
            two filesystems. Correct me if I am wrong.<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span
style="font-family:"Calibri","sans-serif";color:#1F497D">Regards,<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-family:"Calibri","sans-serif";color:#1F497D">Parag<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
        <p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">
            Raj [<a class="moz-txt-link-freetext" href="mailto:rajgautam@gmail.com">mailto:rajgautam@gmail.com</a>] <br>
            <b>Sent:</b> Wednesday, November , 2017 4:57 PM<br>
            <b>To:</b> Parag Khuraswar; Lustre discussion<br>
            <b>Subject:</b> Re: [lustre-discuss] mdt mounting error<o:p></o:p></span></p>
        <p class="MsoNormal"><o:p> </o:p></p>
        <div>
          <p class="MsoNormal">The following can contribute to this
            issue:<o:p></o:p></p>
          <div>
            <p class="MsoNormal">- Missing FS name in mgt creation (it
              must be <=9 character long): --fsname=<o:p></o:p></p>
          </div>
          <div>
            <p class="MsoNormal"><span
style="font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D">mkfs.lustre
                <a href="mailto:--servicenode=10.2.1.204@o2ib"
                  moz-do-not-send="true">--servicenode=10.2.1.204@o2ib</a>
                <a href="mailto:--servicenode=10.2.1.205@o2ib"
                  moz-do-not-send="true">--servicenode=10.2.1.205@o2ib</a>
                <b>--fsname=home</b> --mgs /dev/mapper/mpathc</span><o:p></o:p></p>
          </div>
          <div>
            <p class="MsoNormal"><o:p> </o:p></p>
          </div>
          <div>
            <p class="MsoNormal"><span
style="font-size:13.5pt;font-family:"Calibri","sans-serif"">-
                verify if /mdt directory exists</span><o:p></o:p></p>
          </div>
          <div>
            <p class="MsoNormal"><o:p> </o:p></p>
          </div>
          <div>
            <p class="MsoNormal"><o:p> </o:p></p>
          </div>
        </div>
        <p class="MsoNormal"><o:p> </o:p></p>
        <div>
          <div>
            <p class="MsoNormal">On Wed, Nov 1, 2017 at 6:16 AM Raj <<a
                href="mailto:rajgautam@gmail.com" moz-do-not-send="true">rajgautam@gmail.com</a>>
              wrote:<o:p></o:p></p>
          </div>
          <blockquote style="border:none;border-left:solid #CCCCCC
            1.0pt;padding:0in 0in 0in
            6.0pt;margin-left:4.8pt;margin-right:0in">
            <p class="MsoNormal">What options in mkfs.lustre did you use
              to format with lustre?<o:p></o:p></p>
            <div>
              <div>
                <p class="MsoNormal">On Wed, Nov 1, 2017 at 6:14 AM
                  Parag Khuraswar <<a
                    href="mailto:parag_k@citilindia.com" target="_blank"
                    moz-do-not-send="true">parag_k@citilindia.com</a>>
                  wrote:<o:p></o:p></p>
              </div>
              <blockquote style="border:none;border-left:solid #CCCCCC
                1.0pt;padding:0in 0in 0in
                6.0pt;margin-left:4.8pt;margin-right:0in">
                <div>
                  <div>
                    <p class="MsoNormal"
                      style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Hi
                        Raj,</span><o:p></o:p></p>
                    <p class="MsoNormal"
                      style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
                    <p class="MsoNormal"
                      style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Yes,
                        /dev/mapper/mpatha available. </span><o:p></o:p></p>
                    <p class="MsoNormal"
                      style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I
                        could format and mount using ext4.</span><o:p></o:p></p>
                    <p class="MsoNormal"
                      style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
                    <p class="MsoNormal"
                      style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-family:"Calibri","sans-serif";color:#1F497D">Regards,</span><o:p></o:p></p>
                    <p class="MsoNormal"
                      style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-family:"Calibri","sans-serif";color:#1F497D">Parag</span><o:p></o:p></p>
                    <p class="MsoNormal"
                      style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
                    <p class="MsoNormal"
                      style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
                    <p class="MsoNormal"
                      style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">
                        Raj [mailto:<a href="mailto:rajgautam@gmail.com"
                          target="_blank" moz-do-not-send="true">rajgautam@gmail.com</a>]
                        <br>
                        <b>Sent:</b> Wednesday, November , 2017 4:39 PM<br>
                        <b>To:</b> Parag Khuraswar; Lustre discussion<br>
                        <b>Subject:</b> Re: [lustre-discuss] mdt
                        mounting error</span><o:p></o:p></p>
                  </div>
                </div>
                <div>
                  <div>
                    <p class="MsoNormal"
                      style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
                    <p class="MsoNormal"
                      style="mso-margin-top-alt:auto;margin-bottom:12.0pt">Parag,
                      <br>
                      Is the device /dev/mapper/mpatha available? <br>
                      If not, the multipathd may not have started or the
                      multipath configuration may not be correct. <o:p></o:p></p>
                    <div>
                      <div>
                        <p class="MsoNormal"
                          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">On
                          Wed, Nov 1, 2017 at 5:18 AM Parag Khuraswar
                          <<a href="mailto:parag_k@citilindia.com"
                            target="_blank" moz-do-not-send="true">parag_k@citilindia.com</a>>
                          wrote:<o:p></o:p></p>
                      </div>
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                        #CCCCCC 1.0pt;padding:0in 0in 0in
6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt">
                        <div>
                          <div>
                            <p class="MsoNormal"
                              style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
                                style="font-size:14.0pt;color:#365F91">Hi,</span><o:p></o:p></p>
                            <p class="MsoNormal"
                              style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
                                style="font-size:14.0pt;color:#365F91"> </span><o:p></o:p></p>
                            <p class="MsoNormal"
                              style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
                                style="font-size:14.0pt;color:#365F91">I
                                am getting below error while mounting
                                mdt. Mgt is mounted. </span><o:p></o:p></p>
                            <p class="MsoNormal"
                              style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
                                style="font-size:14.0pt;color:#365F91"> </span><o:p></o:p></p>
                            <p class="MsoNormal"
                              style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
                                style="font-size:14.0pt;color:#365F91">Please
                                suggest</span><o:p></o:p></p>
                            <p class="MsoNormal"
                              style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
                                style="font-size:14.0pt;color:#365F91"> </span><o:p></o:p></p>
                            <p class="MsoNormal"
                              style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
                                style="font-size:14.0pt;color:#365F91">[root@mds2
                                ~]# mount -t lustre /dev/mapper/mpatha
                                /mdt</span><o:p></o:p></p>
                            <p class="MsoNormal"
                              style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
                                style="font-size:14.0pt;color:#365F91">mount.lustre:
                                mount /dev/mapper/mpatha at /mdt failed:
                                No such file or directory</span><o:p></o:p></p>
                            <p class="MsoNormal"
                              style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
                                style="font-size:14.0pt;color:#365F91">Is
                                the MGS specification correct?</span><o:p></o:p></p>
                            <p class="MsoNormal"
                              style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
                                style="font-size:14.0pt;color:#365F91">Is
                                the filesystem name correct?</span><o:p></o:p></p>
                            <p class="MsoNormal"
                              style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
                                style="font-size:14.0pt;color:#365F91">If
                                upgrading, is the copied client log
                                valid? (see upgrade docs)</span><o:p></o:p></p>
                            <p class="MsoNormal"
                              style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
                                style="font-size:14.0pt;color:#365F91"> </span><o:p></o:p></p>
                            <p class="MsoNormal"
                              style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
                                style="color:#365F91">Regards,</span><o:p></o:p></p>
                            <p class="MsoNormal"
                              style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
                                style="color:#365F91">Parag</span><o:p></o:p></p>
                            <p class="MsoNormal"
                              style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
                                style="color:#365F91"> </span><o:p></o:p></p>
                            <p class="MsoNormal"
                              style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
                          </div>
                        </div>
                        <p class="MsoNormal"
                          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">_______________________________________________<br>
                          lustre-discuss mailing list<br>
                          <a
                            href="mailto:lustre-discuss@lists.lustre.org"
                            target="_blank" moz-do-not-send="true">lustre-discuss@lists.lustre.org</a><br>
                          <a
                            href="http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org"
                            target="_blank" moz-do-not-send="true">http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org</a><o:p></o:p></p>
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      <pre wrap="">_______________________________________________
lustre-discuss mailing list
<a class="moz-txt-link-abbreviated" href="mailto:lustre-discuss@lists.lustre.org">lustre-discuss@lists.lustre.org</a>
<a class="moz-txt-link-freetext" href="http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org">http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org</a>
</pre>
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