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Message Posted: Tue, 07 Mar 2006 @ 10:35:26 GMT

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The Disk Capacity (free and used) seen by the database (MAXPERM) can be calculated approximately as total spinning disk less raid overhead and file system formatting overhead:

Spinning Disk Space Capacity * Raid Configuration (i.e R1 = 0.5; R5/RS = 0.75) * 0.915 (File System OS Overhead Factor)

This formula is approximate as the File System OS Overhead Factor varies dependent on the detailed configuration but is approximately 8.5%.

Daniel O'Hara
Project Manager
Teradata a Division of NCR

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