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About PERC 6 and CERC 6i Controllers 27
By default, consistency check automatically corrects mirror or parity
inconsistencies. However, you can enable the Abort Consistency Check on
Error feature on the controller using Dell™ OpenManage™ Storage
Management. With the Abort Consistency Check on Error setting enabled,
consistency check notifies if any inconsistency is found and aborts instead of
automatically correcting the error.
Disk Roaming
The PERC 6 and CERC 6/i adapters 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
capacity expansion (CE). 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, and then disconnect the power cords from the system.
2
Move the physical disks to different 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: The PERC 6 controllers are not backward compatible with previous Small
Computer System Interface (SCSI), PowerEdge Expandable RAID Controller (PERC),
and Redundant Array of Independent Disks (RAID) controllers.
Dell_PERC6.1_UG.book Page 27 Wednesday, April 15, 2009 4:18 PM