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Date:      Wed, 29 Feb 2012 20:53:57 +0300
From:      "Dmitry S. Kasterin" <dmk.sbor@gmail.com>
To:        jb <jb.1234abcd@gmail.com>
Cc:        freebsd-questions@freebsd.org
Subject:   Re: hard disk behavior
Message-ID:  <CAJkxAbz-qaNd2J+uZ4Ts+s4r7+rfJAm6=ZQtvwEzt-=iRJVsXw@mail.gmail.com>
In-Reply-To: <loom.20120229T180349-340@post.gmane.org>
References:  <loom.20120229T180349-340@post.gmane.org>

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Hi!

2012/2/29, jb <jb.1234abcd@gmail.com>:
> Hi,
> I very often hear this metallic (mechanical) clicking from my hard disk when
> it is active. I experience this behavior under FreeBSD only (not other OSs).
> Is there any way to figure out what it means ?

Some time ago I had a similar problem with an external WD Scorpio Blue disk.
As my point of view, it tends to park its heads too often, even under
heavy load,
so this results in a clicking.

As far as I remember, you can check Load_Cycle_Count from SMART output.
Take some measurements during minute or two. Rapid growth of this parameter
indicates a problem.



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