Category Archives: cephadm

Cephadm: Activate existing OSDs

Posted on February 6, 2025 by ebl

A frequent question in the community is, what do I need to do when the operating system of one of my Ceph servers fails, but the OSDs are intact? Can I revive it? The answer is yes! And it’s quite … Continue reading →

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Cephadm: migrate block.db/block.wal to new device

Posted on February 5, 2025 by ebl

A couple of years ago, before cephadm took over Ceph deployments, we wrote an article about migrating the DB/WAL devices from slow to fast devices. The procedure has become much easier than it used to be, thanks to ceph-bluestore-tool (or … Continue reading →

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PGs not deep-scrubbed in time

Posted on September 6, 2024 by ebl

Every now and then, Ceph users or operators stumble across this warning: # ceph health detail HEALTH_WARN 1161 pgs not deep-scrubbed in time [WRN] PG_NOT_DEEP_SCRUBBED: 1161 pgs not deep-scrubbed in time pg 86.fff not deep-scrubbed since 2024-08-21T02:35:25.733187+0000 … Although I … Continue reading →

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