[Beowulf] cold spare storage?

Alex Chekholko alex.chekholko at gmail.com
Thu Aug 17 11:10:02 PDT 2017

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.

On Thu, Aug 17, 2017 at 10:44 AM mathog <mathog at caltech.edu> wrote:

> (Originally posted here:
> https://stackoverflow.com/questions/45719853/enterprise-spare-drives-better-on-shelf-or-spun-down-in-enclosure
> but nobody has answered.)
> Hi all,
> Some Dell servers I recently started managing have spare disks in their
> array enclosures. megacli showed the spares as:
> Firmware state: Online, Spun Up
> so they are not configured as hot spares. Effectively these are cold
> spares, but ones whose working lifetime is being wasted spinning for no
> good reason. They have now been spun down with:
> megacli -PDPrpRmv -PhysDrv[32:5] -a0
> which is better for their longevity, I suppose.
> The question is: would these spares last longer if they were pulled and
> stored in an antistatic bag in a drawer? Even though they are no longer
> spinning they are still in a warm environment and receiving the
> vibrations from the other disks and fans in these servers. I only found
> some articles about storing drives with data on them, but that isn't the
> case here, they are blank. Has anybody published actual data on this
> issue (as opposed to just their opinion)?
> Thanks.
> David Mathog
> mathog at caltech.edu
> Manager, Sequence Analysis Facility, Biology Division, Caltech
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