Re: High ceph_osd_commit_latency_ms on Toshiba MG07ACA14TE HDDs

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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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