[lustre-discuss] OST "D" status - only 1 OSS mounting

Andreas Dilger adilger at whamcloud.com
Sun Oct 31 21:11:57 PDT 2021

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 them.

On Oct 31, 2021, at 19:28, Sid Young via lustre-discuss <lustre-discuss at lists.lustre.org<mailto:lustre-discuss at lists.lustre.org>> wrote:

Hi all,

I have a really odd issue, only 1 OST appears to mount despite there being 4 OSTS available and ACTIVE.

[root at hpc-login-01 home]# lfs df -h
UUID                       bytes        Used   Available Use% Mounted on
home-MDT0000_UUID           4.2T       40.2G        4.1T   1% /home[MDT:0]
home-OST0000_UUID          47.6T       37.8T        9.8T  80% /home[OST:0]
home-OST0001_UUID          47.6T       47.2T      413.4G 100% /home[OST:1] D
home-OST0002_UUID          47.6T       35.7T       11.9T  75% /home[OST:2]
home-OST0003_UUID          47.6T       39.4T        8.2T  83% /home[OST:3]

filesystem_summary:       190.4T      160.0T       30.3T  85% /home

[root at hpc-login-01 home]# lfs check osts
home-OST0000-osc-ffffa10c8f483800 active.
home-OST0001-osc-ffffa10c8f483800 active.
home-OST0002-osc-ffffa10c8f483800 active.
home-OST0003-osc-ffffa10c8f483800 active.

Should be 191TB... only shows 1 OST.. at o2ib:/home     48T   48T  414G 100% /home

Where should I look?

Cheers, Andreas
Andreas Dilger
Lustre Principal Architect

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