[Beowulf] Consumer vs. Enterprise Hard Drives in Clusters

[Peter Kjellstrom]

On Thursday 29 January 2009, Bill Broadley wrote:
> Erwan Velu wrote:
> > Bill Broadley wrote:
> >> I found my actual results from a WD consumer 320GB drive (single
> >> platter) with the drive on the bench vs inside a 1U node:
> >>
> >> http://cse.ucdavis.edu/bill/wd320-2MB-points.png
> >>
> >> http://cse.ucdavis.edu/bill/wd320-2MB-points-vibration.png
> >>
> >> Once the WD320 (a consumer drive) was replaced with a seagate es2 (raid
> >> edition drive):
> >>
> >> http://cse.ucdavis.edu/bill/seagate-es.png
> >
> > Hey Bill,
> > Are we sure the only difference between both cases are only the
> > vibrations ?
>
> Nothing else changed.
>
> > Do you use the same disk controller in all cases ?
>
> Same physical node, not just the same kind of node.
>
> > Does the workload is exactly the same ?
>
> Yes, an idle node with a PXE installed image runs my benchmark.

Interesting data indeed. Can you tell us what kind of node this was? How many 
other drives in it? Did the fans spin at normal speed?

/Peter
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 189 bytes
Desc: This is a digitally signed message part.
URL: <http://www.beowulf.org/pipermail/beowulf/attachments/20090130/8e338da7/attachment.sig>