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List:       ceph-users
Subject:    [ceph-users] Re: High ceph_osd_commit_latency_ms on Toshiba MG07ACA14TE HDDs
From:       Michael Fladischer <michael () fladi ! at>
Date:       2020-06-27 20:45:19
Message-ID: 0d5bdb6e-07c3-91c7-2819-7121fb5a2223 () fladi ! at
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Am 24.06.2020 um 18:08 schrieb Marc Roos:
> I can remember reading this before. I was hoping you maybe had some
> setup with systemd scripts or maybe udev.

We use udev to disable write cache once a suitable disk is detected, 
base on the MODEL_ID from udev environment:

ACTION=="add", SUBSYSTEM=="block", ENV{DEVTYPE}=="disk", 
ENV{ID_MODEL}=="WDC_WUH721414ALE6L4", RUN+="/usr/sbin/smartctl -s 
wcache,off $kernel"

HTH,
Michael
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