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The "D" status means the OST is marked in "Degraded" mode, see the lfs-df(1) man page. The "lfs check osts" is only checking the client connection to the OSTs, but whether the MDS creates objects on those OSTs really depends on how the MDS is feeling about
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<div class="">On Oct 31, 2021, at 19:28, Sid Young via lustre-discuss <<a href="mailto:lustre-discuss@lists.lustre.org" class="">lustre-discuss@lists.lustre.org</a>> wrote:</div>
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<div class="">Hi all,</div>
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<div class="">I have a really odd issue, only 1 OST appears to mount despite there being 4 OSTS available and ACTIVE.</div>
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[root@hpc-login-01 home]# lfs df -h<br class="">
UUID bytes Used Available Use% Mounted on<br class="">
home-MDT0000_UUID 4.2T 40.2G 4.1T 1% /home[MDT:0]<br class="">
home-OST0000_UUID 47.6T 37.8T 9.8T 80% /home[OST:0]<br class="">
home-OST0001_UUID 47.6T 47.2T 413.4G 100% /home[OST:1] D<br class="">
home-OST0002_UUID 47.6T 35.7T 11.9T 75% /home[OST:2]<br class="">
home-OST0003_UUID 47.6T 39.4T 8.2T 83% /home[OST:3]<br class="">
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filesystem_summary: 190.4T 160.0T 30.3T 85% /home<br class="">
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<div class="">[root@hpc-login-01 home]# lfs check osts<br class="">
home-OST0000-osc-ffffa10c8f483800 active.<br class="">
home-OST0001-osc-ffffa10c8f483800 active.<br class="">
home-OST0002-osc-ffffa10c8f483800 active.<br class="">
home-OST0003-osc-ffffa10c8f483800 active.<br class="">
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<div class="">Should be 191TB... only shows 1 OST..</div>
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<div class="">10.140.93.42@o2ib:/home <b class="">48T </b> 48T 414G 100% /home<br class="">
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<div class="">Where should I look?</div>
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<div>Cheers, Andreas</div>
<div>--</div>
<div>Andreas Dilger</div>
<div>Lustre Principal Architect</div>
<div>Whamcloud</div>
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