Tables and indexes on different disks

Hi all,

I've read an interesting section in Oracle Docu (Tuning I/O):

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Separating Tables and Indexes

It is not necessary to separate a frequently used table from its index. During the course of a transaction, the index is read first, and then the table is read. Because these I/Os occur sequentially, the table and index can be stored on the same disk without contention.
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Why do you then recommend to separate tables and indexes to different disks?

Thanks

        Mike

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Author: Michal Zaschke
  INET: zaschke_at_suas.cz

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