How an Oracle block# is mapped to a file offset (in bytes or OS blocks)
Last updated on MAY 15, 2014
Applies to:Oracle Database - Enterprise Edition - Version 10.2.0.1 to 184.108.40.206 [Release 10.2 to 12.1]
Information in this document applies to any platform.
This document is about how an Oracle block number is mapped to a file offset (in bytes or OS blocks) for Generic OS platforms and includes an alternate formula for specific OS platforms like AIX and HP Tru64. These are the only 2 platforms where the Volume Manager reserves space for Metadata in the Oracle datafile.
For Oracle 10g and 10gR2 there are only two platforms with logical volume Metadata on raw devices: AIX and HP Tru64.
HP Tru64 is no longer supported on Oracle 11g, so AIX is the only one in 11g.
Sign In with your My Oracle Support account
Don't have a My Oracle Support account? Click to get started
Million Knowledge Articles and hundreds of Community platforms