Oracle Database 2 Day DBA 11g Release- P14:Oracle Database 2 Day DBA is a database administration quick start guide that teaches you how to perform day-to-day database administrative tasks. The goal of this guide is to help you understand the concepts behind Oracle Database. It teaches you how to perform all common administrative tasks needed to keep the database operational, including how to perform basic troubleshooting and performance monitoring activities. | Backing Up ASM-Managed Files To drop one or more disks from a disk group 1. Go to the ASM Home page. See Accessing the Automatic Storage Management Home Page on page A-4. 2. Click the Disk Groups link to display the Disk Groups subpage. 3. If the Automatic Storage Management Login page appears log in as the SYS user connecting as SYSASM. Provide the SYS password that was set when the ASM instance was created. 4. Click a link in the Name column to select the disk group from which you want to drop disks. The Disk Group page appears. 5. Under the Member Disks heading in the Select column select the check boxes for the disks that you want to drop and then click Remove. A confirmation page appears. 6. If you want to change rebalance power or if you want set the FORCE option for dropping disks do the following a. Click Show Advanced Options. b. Optionally select the Force option or select a value for rebalance power in the Rebalance Power list. Note You may need the FORCE option if ASM cannot read from or write to the disk. 7. Click Yes to drop the disks. The Disk Group page returns and displays a state of DROPPING for each disk being dropped. 8. Refresh the page until the dropped disks no longer appear in the disk group. Caution You cannot reuse or disconnect the dropped disks until the drop and rebalance operations are complete that is until the dropped disks no longer appear in the disk group. See Also Overview of Disks Disk Groups and Failure Groups on page A-3 Oracle Database Storage Administrator s Guide for more information about the FORCE option Oracle Database Storage Administrator s Guide for more information and for other caveats about dropping disks Backing Up ASM-Managed Files Oracle recommends that you use Recovery Manager RMAN to back up files managed by ASM. See Chapter 9 Performing Backup and Recovery for the information about using RMAN for performing backups. Administering Automatic Storage Management A-11 Automatic Storage Management Oracle By Example
