I would suggest checking the logs and seeing the exact reason its being marked out.

If the disk is being hit hard and their is heavy I/O delays then Ceph may see that as a delayed reply outside of the set windows and mark as out.

There is some variables that can be changed to give an OSD more time to reply to a heartbeat, but I would definitely suggest checking the OSD log at the time of the disk being marked out to see exactly what's going on.

As the last thing you want to do is just patch an actually issue if there is one.

---- On Fri, 06 Sep 2019 02:11:06 +0800 solarflow99@gmail.com wrote ----

no, I mean ceph sees it as a failure and marks it out for a while

On Thu, Sep 5, 2019 at 11:00 AM Ashley Merrick <singapore@amerrick.co.uk> wrote:

Is your HD actually failing and vanishing from the OS and then coming back shortly?

Or do you just mean your OSD is crashing and then restarting it self shortly later?

---- On Fri, 06 Sep 2019 01:55:25 +0800 solarflow99@gmail.com wrote ----

One of the things i've come to notice is when HDD drives fail, they often recover in a short time and get added back to the cluster.  This causes the data to rebalance back and forth, and if I set the noout flag I get a health warning.  Is there a better way to avoid this?

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