Difference between RAW and USABLE storage capacity

PJK,
A couple prior threads on this general topic are at;
http://forums.emc.com/forums/thread.jspa?threadID=68109
and
http://forums.emc.com/forums/thread.jspa?threadID=107198

Note that if the drives in question are in the Vault (first 5 drives in a CX storage system) there is additional capacity reserved, as compared to the remaining drives in the array (see the second posting above).

If the above do not answer your question, it would help if you can post the specific figures you are seeing, and what the configuration is.

Regards,
DGM

Pjk, is your question now answered to your satisfaction ? Every now and then people are asking these capacity questions, so there should be enough threads available to feed your knowledge

In the EMC CLARiiON Best Practices for Performance and Availability, Revision 28.5 there is a section 'Actual Drive Capacity' addressing this question. Best Practices is available for download through Powerlink.

http://powerlink.emc.com/km/live1/en_US/Offering_Technical/White_Paper/h5773-clariion-perf-availability-release-28-firmware-wp.pdf

In addition, the EMC CLARiiON Storage System Fundimentals for Performance and Availabilty available shortly over Powerlink contains a higher-level description of the difference. This will be available over Powerlink by the end of the month.

Hi,

the links are broken.  would someone be able to assist to update them.

Thanks,