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<FONT face=Tahoma size=2><B>From:</B> tclug-list-bounces@mn-linux.org
[mailto:tclug-list-bounces@mn-linux.org] <B>On Behalf Of </B>Linda
Kateley<BR><B>Sent:</B> Friday, January 23, 2015 11:06 AM<BR><B>To:</B>
tclug-list@mn-linux.org<BR><B>Subject:</B> Re: [tclug-list] SSD vs HDD for DIY
security camera project<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV class=moz-cite-prefix>On 1/22/15 8:15 PM, Chuck Cole wrote:<BR></DIV>
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<FONT face=Tahoma size=2><B>From:</B> <A class=moz-txt-link-abbreviated
href="mailto:tclug-list-bounces@mn-linux.org">tclug-list-bounces@mn-linux.org</A>
[<A class=moz-txt-link-freetext
href="mailto:tclug-list-bounces@mn-linux.org">mailto:tclug-list-bounces@mn-linux.org</A>]
<B>On Behalf Of </B>Craig Smith<BR><B>Sent:</B> Thursday, January 22, 2015
5:50 PM<BR><B>To:</B> <A class=moz-txt-link-abbreviated
href="mailto:tclug-list@mn-linux.org">tclug-list@mn-linux.org</A><BR><B>Subject:</B>
Re: [tclug-list] SSD vs HDD for DIY security camera
project<BR></FONT><BR></DIV>
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<P class=MsoNormal> </P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 11pt; COLOR: rgb(31,73,125); FONT-FAMILY: 'Calibri','sans-serif'">Thanks
to all who replied. The consensus was that SDD reliability wasn’t a
concern given my bandwidth, but performance wasn’t worth the
money. <SPAN class=896530602-23012015><FONT face=Arial color=#0000ff
size=4> </FONT></SPAN></SPAN></P></DIV></BLOCKQUOTE>
<P class=MsoNormal dir=ltr><SPAN
style="FONT-SIZE: 11pt; COLOR: rgb(31,73,125); FONT-FAMILY: 'Calibri','sans-serif'"><SPAN
class=896530602-23012015></SPAN></SPAN> </P>
<P class=MsoNormal dir=ltr><SPAN
style="FONT-SIZE: 11pt; COLOR: rgb(31,73,125); FONT-FAMILY: 'Calibri','sans-serif'"><SPAN
class=896530602-23012015><FONT face=Arial color=#0000ff size=4>FWIW, I'm
very happy with the Seagate ST1000LM0141 tb hybrid
SSHD</FONT> <FONT face=Arial color=#0000ff size=4>drive I put in my
laptop. It's 4x the speed of "only rotating" and only about
15% higher price than a "rotating only"
model.</FONT></SPAN></SPAN></P></BLOCKQUOTE>
<DIV><FONT face=Arial color=#0000ff size=4>Nice, has anyone seen any
"endurance" numbers for these hybrid drives? <BR><BR>I have been watching
these tests on ssds..<BR><BR></FONT><A class=moz-txt-link-freetext
href="http://techreport.com/review/27436/the-ssd-endurance-experiment-two-freaking-petabytes"><FONT
face=Arial
size=4>http://techreport.com/review/27436/the-ssd-endurance-experiment-two-freaking-petabytes</FONT></A><BR><BR><FONT
face=Arial color=#0000ff size=4>But my instinct is that hybrid would actually
have lower endurance. All of the heat/noise/vibration that comes off a hdd
would seem not to be good for ssd. Or if it is not writing much into ssd
part... ???<BR> <SPAN
class=367203421-23012015> </SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=4><SPAN
class=367203421-23012015></SPAN></FONT> </DIV>
<DIV><FONT face=Arial color=#0000ff size=4><SPAN
class=367203421-23012015>Linda (et al)</SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=4><SPAN
class=367203421-23012015></SPAN></FONT> </DIV>
<DIV><FONT face=Arial color=#0000ff size=4><SPAN class=367203421-23012015>I
have some knowledge of these things technically and "was in the business"
of both hi-rel and hard drives..</SPAN></FONT></DIV><FONT face=Arial
color=#0000ff size=4><SPAN class=367203421-23012015></SPAN></FONT></BLOCKQUOTE>
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style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #0000ff 2px solid; MARGIN-RIGHT: 0px"><SPAN
class=367203421-23012015></SPAN>
<DIV><SPAN class=367203421-23012015></SPAN><FONT face=Arial color=#0000ff
size=4>N<SPAN class=367203421-23012015>oise and vibration aren't big
issues since these chips don't have big ears and are mounted in quiet corners
with good thermal conductivity to the outside as well as good air circulation
inside. Temperature is not a big issue unless things get .. hotter
than just warm. The effect of temperature on reliability is not
bad until (slowly drops) until some critical temp is neared or exceeded.
Going from memory and don't recall clearly, but I think that's about 50C which
is likely much hotter than my Dell laptop hard drives ever get. At this
"critical temp", the reliability curve drops as the 3rd or 5th power of the
difference above the critical temp.. a very sharp decrease in reliability
indeed, but insignificant below the critical temp.</SPAN></FONT></DIV><FONT
face=Arial color=#0000ff size=4><SPAN
class=367203421-23012015></SPAN></FONT></BLOCKQUOTE>
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style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #0000ff 2px solid; MARGIN-RIGHT: 0px"><SPAN
class=367203421-23012015></SPAN>
<DIV><SPAN class=367203421-23012015></SPAN><FONT face=Arial color=#0000ff
size=4>O<SPAN class=367203421-23012015>ther parts inside a hard drive have a
tougher time, but the issues are very well understood and accounted for which
is why hard drives are more reliable than most semiconductor memory (because
board and box temps aren't as well-controlled). Seagate puts their 5
year guarantee on their SSHD drives.</SPAN></FONT></DIV><FONT face=Arial
color=#0000ff size=4><SPAN class=367203421-23012015></SPAN></FONT></BLOCKQUOTE>
<BLOCKQUOTE
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #0000ff 2px solid; MARGIN-RIGHT: 0px"><SPAN
class=367203421-23012015></SPAN>
<DIV><SPAN class=367203421-23012015></SPAN><FONT face=Arial color=#0000ff
size=4>C<SPAN
class=367203421-23012015>huck </SPAN><BR></FONT></DIV></BLOCKQUOTE></BODY></HTML>