Vol 121 Issue 4 2008-03-24 Article 19476 from section "SysAdmin's Section"

Guidelines for Assessment and Implementation

IT managers interested in improving their bottom line will find a
useful economy in the BigAdmin article on "Managing the Power Used by
Idle Disks in Servers Running the Solaris 8 OS or Above," which notes
that idle spinning SAS disks can consume several watts and that
managing multiple disks can result in substantial power cost
reductions. Some considerations that govern the decision to spin-down
or not are reviewed.

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