Dell 5 series User Manual

Contents

Dell 5 series User Manual Manual pdf 20 page image

18 PERC 5 FeaturesDisk RoamingThe PERC 5 controllers support moving physical disks from one cable connection or backplane slot toanother on the same controller. The controllers automatically recognize the relocated physical disks andlogically place them in the proper virtual disks that are part of the disk group. You can perform diskroaming only when the system is shut down.Perform the following steps to use disk roaming.1 For proper shutdown, turn off the power to the system, physical disks, enclosures, and systemcomponents, and then disconnect the power cords from the system.2 Move the physical disks to different positions on the backplane or enclosure.3 Perform a safety check. Make sure the physical disks are inserted properly and perform correctly.4 Turn on the system.The controller detects the RAID configuration from the configuration data on the physical disks.Disk MigrationThe PERC 5 controllers support migration of virtual disks from one controller to another without takingthe target controller offline. However, the source controller must be offline prior to performing the diskmigration. The controller can import a virtual disk that is in optimal or degraded state. A virtual disk inoffline state cannot be imported.NOTE: The PERC 5 controllers are not backward compatible with previous SCSI PERC RAID controllers.When a controller detects a physical disk with a pre-existing configuration, it flags the physical disk asforeign and generates an alert indicating that a foreign disk was detected.Dedicated hot spares are imported as global hot spares. The firmware generates an alert to indicate achange in hot spare configuration.Perform the following steps to use disk migration.1 Turn off the system that contains the source controller.2 Move the appropriate physical disks from the source controller to the target controller.The system with the target controller can be running while inserting the physical disks.3 The storage management application will flag the inserted disks as foreign disks.4 Use the storage management application to import the detected foreign configuration.NOTE: Ensure the complete set of physical disks that form the virtual disk are migrated.Alarm Alert in Case of Physical Disk FailuresAn audible alarm is available on the PERC 5/E Adapter to alert you of key critical and warning events involvingthe virtual disk or physical disk problems. You can use the Basic Input/Output System (BIOS) ConfigurationUtility and management application to enable, disable, or silence the on-board alarm tone.NOTE: See "Audible Alarm Warnings" on page 79 for information about audible alarm codes.Dell_PERC5_UG.book Page 18 Tuesday, February 13, 2007 6:02 PM