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Database Essentials
Administrative Planning : Database areas : Primary recovery (before-image) information : Sequential access
Sequential access
The primary recovery area is sequentially accessed. Items are written to and read from this area in a generally linear fashion. If you are able to isolate a database's primary recovery area from other database files and other databases, then it is a good idea to store the extents for this area on a single disk (mirror).
While striping increases the throughput potential of a file system, it is particularly effective for random I/O. If the area is not isolated from the database, or you are storing the primary recovery areas of several databases on the same disk, use striping because the I/O will be fairly randomized across the databases.