About PERC 6 and CERC 6/i Controllers 27
Disk Roaming
The PERC 6 and CERC 6/i controllers support moving physical disks from
one cable connection or backplane slot to another on the same controller.
The controller automatically recognizes the relocated physical disks and
logically places them in the proper virtual disks that are part of the disk group.
You can perform disk roaming only when the system is turned off.
CAUTION: Do not attempt disk roaming during RAID level migration (RLM) or
online capacity expansion (OCE). This causes loss of the virtual disk.
Perform the following steps to use disk roaming:
1
Turn off the power to the system, physical disks, enclosures, and system
components. Disconnect power cords from the system.
2
Move the physical disks to desired positions on the backplane or
the enclosure.
3
Perform a safety check. Make sure the physical disks are inserted properly.
4
Turn on the system.
The controller detects the RAID configuration from the configuration
data on the physical disks.
Disk Migration
The PERC 6 and CERC 6/i controllers support migration of virtual disks from
one controller to another without taking the target controller offline.
However, the source controller must be offline prior to performing the
disk migration. The controller can import RAID virtual disks in optimal,
degraded, or partially degraded states. You cannot import a virtual disk that is in
an offline state.
NOTE: Disks cannot be migrated back to previous Dell PERC RAID controllers.
When a controller detects a physical disk with an existing configuration, it
flags the physical disk as foreign, and it generates an alert indicating that a
foreign disk was detected.
CAUTION: Do not attempt disk roaming during RAID level migration (RLM) or
online capacity expansion (OCE). This causes loss of the virtual disk.
Dell_PERC6.2_UG.book Page 27 Wednesday, June 24, 2009 6:08 PM
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