<div dir="ltr">The Google paper from a few years ago showed essentially no correlations between the things you ask about and failure rates. So... do whatever is most convenient for you.</div><br><div class="gmail_quote"><div dir="ltr">On Thu, Aug 17, 2017 at 10:44 AM mathog <<a href="mailto:mathog@caltech.edu">mathog@caltech.edu</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">(Originally posted here:<br>
<br>
<a href="https://stackoverflow.com/questions/45719853/enterprise-spare-drives-better-on-shelf-or-spun-down-in-enclosure" rel="noreferrer" target="_blank">https://stackoverflow.com/questions/45719853/enterprise-spare-drives-better-on-shelf-or-spun-down-in-enclosure</a><br>
<br>
but nobody has answered.)<br>
<br>
Hi all,<br>
<br>
Some Dell servers I recently started managing have spare disks in their<br>
array enclosures. megacli showed the spares as:<br>
<br>
Firmware state: Online, Spun Up<br>
<br>
so they are not configured as hot spares. Effectively these are cold<br>
spares, but ones whose working lifetime is being wasted spinning for no<br>
good reason. They have now been spun down with:<br>
<br>
megacli -PDPrpRmv -PhysDrv[32:5] -a0<br>
<br>
which is better for their longevity, I suppose.<br>
<br>
The question is: would these spares last longer if they were pulled and<br>
stored in an antistatic bag in a drawer? Even though they are no longer<br>
spinning they are still in a warm environment and receiving the<br>
vibrations from the other disks and fans in these servers. I only found<br>
some articles about storing drives with data on them, but that isn't the<br>
case here, they are blank. Has anybody published actual data on this<br>
issue (as opposed to just their opinion)?<br>
<br>
Thanks.<br>
<br>
David Mathog<br>
<a href="mailto:mathog@caltech.edu" target="_blank">mathog@caltech.edu</a><br>
Manager, Sequence Analysis Facility, Biology Division, Caltech<br>
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</blockquote></div>