<div dir="ltr">To keep things simple at Computer Recycling we use gsmartcontrol (graphical front end to smartcontrol). It's nice because it puts in pink/red various kinds of errors drives have. The last tab has a short and extended test. Mind you this is when we're testing drives we haven't used before.<br>
</div><div class="gmail_extra"><br><br><div class="gmail_quote">On Thu, May 15, 2014 at 11:55 PM, William Park <span dir="ltr"><<a href="mailto:opengeometry@yahoo.ca" target="_blank">opengeometry@yahoo.ca</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="">On Thu, May 15, 2014 at 10:54:31PM -0400, Khalid Baheyeldin wrote:<br>
> On Thu, May 15, 2014 at 9:55 PM, Khalid Baheyeldin <<a href="mailto:kb@2bits.com">kb@2bits.com</a>> wrote:<br>
><br>
> > The method I used is to connect the drive to the laptop, unmount the NTFS<br>
> > filesystem that is on it, and then do:<br>
> ><br>
> > time dd if=/dev/sdb bs=16mb of=/dev/null<br>
> ><br>
><br>
> It is finally done ...<br>
><br>
> # time dd if=/dev/sdb bs=16000k of=/dev/null<br>
> 61047+1 records in<br>
> 61047+1 records out<br>
> 1000204886016 bytes (1.0 TB) copied, 28626.2 s, 34.9 MB/s<br>
<br>
</div>34.9MB/s is pretty fast for USB2, but slow for USB3. What I usually do<br>
in this case is<br>
badblocks -b 4096 -c 4096 -sv ...<br>
badblocks -b 4096 -c 4096 -swv ...<br>
where -w is for destructive read/write test.<br>
<div class=""><br>
><br>
> real 477m6.269s<br>
> user 0m0.296s<br>
> sys 19m33.457s<br>
><br>
> That is 7.95 hours ...<br>
> --<br>
> Khalid M. Baheyeldin<br>
> <a href="http://2bits.com" target="_blank">2bits.com</a>, Inc.<br>
> Fast Reliable Drupal<br>
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> Simplicity is prerequisite for reliability. -- Edsger W.Dijkstra<br>
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> For every complex problem, there is an answer that is clear, simple, and<br>
> wrong." -- H.L. Mencken<br>
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</blockquote></div><br><br clear="all"><br>-- <br><div dir="ltr">Charles McColm, Author: Instant XBMC,<br>Columnist: Full Circle Magazine,<br>Project Manager: The Working Centre Computer Recycling Project<br>Web: <a href="http://www.theworkingcentre.org/cr/" target="_blank">http://www.theworkingcentre.org/cr/</a><br>
Blog: <a href="http://www.charlesmccolm.com/" target="_blank">http://www.charlesmccolm.com/</a><br>Twitter/Identica/Google+: @chaslinux<br></div>
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