Date: Wed, 21 Sep 2022 01:33:35 +0100 From: Graham Perrin <grahamperrin@freebsd.org> To: questions@freebsd.org Subject: Re: disk non-destructive bad-block write/fix? Message-ID: <8758b440-ef11-933f-a42c-2c09f6d1b6c9@freebsd.org> In-Reply-To: <d687eb29-a3fb-7d91-a2c6-c1e4e1dc7e31@dreamchaser.org> References: <d687eb29-a3fb-7d91-a2c6-c1e4e1dc7e31@dreamchaser.org>
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From: Graham Perrin <grahamperrin@freebsd.org>
To: questions@freebsd.org
Message-ID: <8758b440-ef11-933f-a42c-2c09f6d1b6c9@freebsd.org>
Subject: Re: disk non-destructive bad-block write/fix?
References: <d687eb29-a3fb-7d91-a2c6-c1e4e1dc7e31@dreamchaser.org>
In-Reply-To: <d687eb29-a3fb-7d91-a2c6-c1e4e1dc7e31@dreamchaser.org>
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<p>On 20/09/2022 04:40, Gary Aitken wrote:<br>
</p>
<blockquote type=3D"cite"
cite=3D"mid:d687eb29-a3fb-7d91-a2c6-c1e4e1dc7e31@dreamchaser.org">=E2=
=80=A6
my only available backup disk is
throwing a lot of errors like:
<br>
<br>
=E2=80=A6<br>
<br>
Is there a way to exercise the free blocks <br>
</blockquote>
<p>stressdisk</p>
<p><a class=3D"moz-txt-link-rfc2396E" href=3D"https://www.freshports.=
org/sysutils/stressdisk/"><https://www.freshports.org/sysutils/stressd=
isk/></a><br>
</p>
<p>Note: I should _not_ stress (exercise) a disk that is my only
available backup, if there's the risk of worsening the situation
(without certainty of the cause(s) of errors).=C2=A0</p>
<p>stressdisk can be very handy, in rare situations where you truly
want to temporarily fill a file system, however it's not really a
fit for "disk non-destructive bad-block write/fix". <br>
</p>
<p>There's also this feature of HDAT2
<a class=3D"moz-txt-link-rfc2396E" href=3D"https://www.hdat2.com/">=
<https://www.hdat2.com/></a>, for an entire disk (not just a
file system): <br>
</p>
<p>* Detect and fix bad sectors</p>
<p>Again, I should not use it if there's the risk of worsening the
situation. <br>
</p>
<p>HTH<br>
</p>
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