Explain how and where kern.cam.ada.write_cache can be set in practical
situations. Reviewed by: hrs Approved by: mav
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2020-12-20 02:59:44 +00:00
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@ -25,7 +25,7 @@
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.\"
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.\" $FreeBSD$
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.\"
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.Dd February 8, 2012
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.Dd February 21, 2014
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.Dt ADA 4
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.Os
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.Sh NAME
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@ -129,8 +129,13 @@ The default is currently enabled.
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These variables determines whether device write cache should be enabled
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globally or per-device or disabled.
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Set to 1 to enable write cache, 0 to disable, -1 to leave it as-is.
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Values modified in runtime take effect only after device reset.
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The global default is currently enabled.
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Values modified at runtime take effect only after device reset
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.Pq using the reset subcommand of Xr camcontrol 8 .
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Because of that, this setting should be changed in
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.Pa /boot/loader.conf
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instead of
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.Pa /etc/sysctl.conf .
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The global default is currently 1.
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The per-device default is to leave it as-is (follow global setting).
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.El
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.Sh FILES
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