What does it mean for a hard drive with 15K rpm but 10K performance?

Castlewood
Castlewood used Ask the Experts™
on
This is so confusing...
For some hard drives,  it says 15K rpm drive but 10K performance. What does it mean?
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Lee W, MVPTechnology and Business Process Advisor
Most Valuable Expert 2013

Commented:
Where are you seeing this?
Is it refering to your performance configured at certain raid levels?

Or mixed drive speeds bring the speed down?

https://community.spiceworks.com/topic/275664-mixing-10k-and-15k-rpm-speed-disks-in-servers

Author

Commented:
That is printed on Seagate T10 SAS drive.
Interesting, maybe look up the drive model on the site (or supplier) and see if they mention 10K limits.

Author

Commented:
can not find exact docs for this but here are two links to related info:
http://www.seagate.com/docs/pdf/marketing/po_cheetah_ns.pdf
http://www.adverts.ie/servers/se-agate-300g-b-sas-st33-00555ss-rp-m-15k-3-5/749932

The main question I want to know is, RPM = Performance ??

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