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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">Dear Lustre,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">Recently we had a degraded(Not failed) RAID and had to wait longer to get compatible disk, as we had received incompatible one and it took over a week to get the correct one
back in place. <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">During this wait I ended up disabling the OST first and then noticed continuous IO to the OST and thought of disabling object creation on it as well. Everything looked normal
after that and once the disk was replaced I reenabled object creation and enabled OST. Since then I started seeing these messages on OST<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">…(ofd_dev.c:1784:ofd_create_hdl()) scratch0-OST0029: unable to precreate: rc = -52<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">And following messages on MDS<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">…(osp_precreate.c:1282:osp_precreate_thread()) scratch0-OST0029-osc-MDT0000: cannot precreate objects: rc = -116<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">…(osp_precreate.c:657:osp_precreate_send()) scratch0-OST0029-osc-MDT0000: precreate fid [0x100290000:0x101b39a:0x0] < local used fid [0x100290000:0x101b39a:0x0]: rc = -116<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">These messages don’t seem to stop. I am wondering what impact could these errors have in long run? I have noticed I am not able to create files on this particular OST using lfs
setstripe, when I do so it gets me an object on another OST by default. Just want to make sure this is not causing any data loss for files the currently on them and new requests?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">We plan to upgrade to 2.12 in the summer downtime and assuming that has a fix based on LU-9442 & LU-11186. Currently running servers on lustre 10.4.1 over ZFS-0.7.9-1<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">Any help is greatly appreciated.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">Thank you,<br>
Amit<o:p></o:p></span></p>
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