Dell
DELL PERC H700 and H800 Technical Guide 19
4.7 Disk Roaming The PERC H700 and H800 cards 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. Disk roaming can be performed only when the system is turned off. Disk roaming should not
be performed during RAID level migration (RLM) or online capacity expansion (OCE). This causes loss
of the virtual disk.
4.8 Disk Migration The PERC H700 and H800 cards 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. A virtual disk cannot be imported if it is in an offline state.
Disks cannot be migrated back to previous 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. Disk roaming should not be used during RLM or
online capacity expansion OCE as it can cause loss of the virtual disk.
Virtual disks that are created on the PERC 6 and H200 family of controllers can be migrated to the
PERC H700 and H800 controllers without risking data or configuration loss. Migrating virtual disks
from the PERC H700 and H800 cards to PERC 6 or PERC H200 is not supported.
During the discharge phase of a learn cycle, the PERC H700 or H800 battery charger is disabled and
remains disabled until the battery is discharged. After the battery is discharged, the charger is re-
enabled.
4.9 PERC H700 and H800 Security Key and RAID Management 4.9.1 PERC H700 and H800 Security Key Implementation The Dell PowerEdge RAID Controller (PERC) H700 and H800 cards support encryption of data on the
drives when using Dell qualified self-encrypting drives (SEDs). This feature provides protection to the
data at rest in the event of theft or loss of drives. There is one security key per controller which
resides in the controller memory and it can be managed by the user (local key management). The
security key is used by the controller to lock and unlock access to encryption-capable physical drives.
In order to take advantage of this feature, you need to create a security key on your PERC H700 or
PERC H800 controller and have Dell qualified SEDs.
4.9.2 Configuring and Managing Secured RAID Dell OpenManage storage management applications enable you to create and manage a security key,
manage and configure the RAID system, create and manage multiple disk groups, control and monitor
multiple RAID systems, and provide online maintenance. The management applications for PERC
H700 and H800 include:
• Dell OpenManage Storage Management • BIOS Configuration Utility