Oracle 10g ASM is a database file system that provides cluster file system and volume manager capabilities integrated into the Oracle database 10g kernel. It is applicable only to Oracle database files. HP and Oracle have conducted extensive testing using the HP StorageWorks Enterprise Virtual Array (EVA) and XP Arrays with Oracle Database 10g Automatic Storage Management (ASM) on HP-UX demonstrating that Oracle ASM can optimize workloads without affecting performance. ASM implemented internally the Stripe and Mirror Everything (SAME) storage database layout methodology from Oracle. In this paper, HP and Oracle discuss how HP StorageWorks arrays are used with ASM. The paper then provides details of the lab tests, including system configurations, test descriptions, results, and best practices recommendations.