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<div class="moz-cite-prefix">On 09/20/2016 04:32 PM, Rick Hornsby
wrote:<br>
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<p class="airmail_on">On September 20, 2016 at 11:17:07, tom (<a
moz-do-not-send="true"
href="mailto:thomas.w.cranston@gmail.com">thomas.w.cranston@gmail.com</a>)
wrote:</p>
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<div>How can I check a new HDD or SSD for errors. I could
use the Disks gui,<span class="Apple-converted-space"> </span><br>
but I don't think it will detect bad areas on either
type of drive. Is<span class="Apple-converted-space"> </span><br>
there a command line I could use? Could a Windows
install disk be used<span class="Apple-converted-space"> </span><br>
to check a drive for bad areas. Is it reasonable to
expect a HDD or SSD<span class="Apple-converted-space"> </span><br>
to be 100% flawless when brand new?<span
class="Apple-converted-space"> </span></div>
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<p>It depends on what you mean by "100% flawless". Should a drive
perform adequately and to specifications out of the box? Yes,
absolutely. Should a drive have 0 bad blocks already remapped by
the drive's firmware? Probably. Does a bad block or two that's
been remapped and that the OS will never know about really
matter? No.</p>
<p>If you can momentarily retreat from the idea where you seem to
think your new drive has bad blocks, and explain the symptoms
you're experiencing, we might be able to provide better insight
to whatever problem you're having.</p>
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No new drive yet. Just getting prepared to buy one. I want to send
it back immediately if not up to par.<br>
<blockquote cite="mid:etPan.57e1ab09.2e06684a.ad7c@gmail.com"
type="cite">
<p>There are many many software products which will perform a
surface scan of your disk, and will attempt to validate that
there aren't any bad blocks the drive's firmware has yet to
remap. Use a little bit of caution when running these tools
against an SSD. SSDs are a completely different storage
technology than traditional magnetic platters. They are not
nearly as easily manipulated into checking a specific physical
area of the disk's memory, but rather often provide a layer of
abstraction from even the SATA controller - to the point where
you pretty much can't actually know with any certainty what
physical part of the drive's "memory" you're looking at.</p>
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<div>I am leaning towards a SSD for my laptop as I think
it will not be<span class="Apple-converted-space"> </span><br>
affected by movement of the laptop.<span
class="Apple-converted-space"> </span></div>
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<p>Well, yes. It is true there are no moving parts in an SSD.
Under normal conditions, a spinny drive is not necessarily a
critical improvement over an SSD as far as movement of the
laptop. Between the computers and the drives themselves,
modern gear tends to be able to park (lock) the heads when
they sense a sudden acceleration - like a fall. A laptop
dropped the wrong way from enough of a height onto a hard
surface can destroy either type of drive. If the laptop is
going to experience a lot of vibration - ie it will be used in
a moving truck, get an SSD. Spinny drives are pretty solid,
but there's no reason to risk dropping a head into a platter.</p>
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<div>Would probably go with HDD for my<span
class="Apple-converted-space"> </span><br>
desktop computer as it just sits there for years on
end.<span class="Apple-converted-space"> </span></div>
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<p>SSDs have a few more benefits - they're faster, have lower
power requirements, and don't run as hot. However SSDs are
still a little more expensive on a per GB cost for smaller
drives, all the way to a lot more expensive for the larger
capacities.</p>
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