Users Guide
• From another system's Shared PERC 8 controller when the target system is either turned on or o.
NOTE: When a controller detects a physical disk with an existing conguration, it ags the physical disk as a foreign disk and
generates an alert indicating that a foreign disk was detected.
Migrating virtual disks if the target system is turned o
1 If installed, remove the front bezel (optional) from the PowerEdge VRTX enclosure.
2 Power down the server module using the operating system commands or the CMC, and ensure that the server module's power is o.
3 Turn o the chassis using CMC.
NOTE: For information about the chassis shutdown, see the
Dell Chassis Management Controller for Dell PowerEdge VRTX
User’s Guide
at Dell.com/esmmanuals.
4 Move the appropriate physical disks from the source system to the target system with a similar Shared PERC 8 controller.
NOTE: If you are moving an entire just a bunch of disks (JBOD) enclosure, make sure to turn o the JBOD before cabling to
the new controller.
5 Turn on the target system.
The system discovers and automatically imports the detected foreign conguration.
Migrating virtual disks if the target system is turned on
1 Turn o the source system.
2 Move the appropriate physical disks from the source system to the target system with a similar Shared PERC 8 card.
NOTE
: If you are moving an entire JBOD enclosure, make sure to turn o the JBOD before cabling to the new
controller.
3 Access the Dell Chassis Management Controller (CMC) to import and clear the foreign conguration.
NOTE
: For more information on importing or clearing the foreign conguration, see the
Dell Chassis Management Controller
for Dell PowerEdge VRTX User’s Guide
at Dell.com/poweredgemanuals.
NOTE: If write cache is enabled for these virtual disks, ensure that all cache is ushed to the hard drives on the source
system before removing them. This can be accomplished by stopping all applications, powering down the blades, and
waiting 30 seconds before powering down the chassis.
Virtual disk cache policies
The following virtual disk cache policies are supported on Shared PERC 8:
• Virtual disk write cache policies
• Virtual disk read cache policies
Virtual disk write cache policies
The write cache policy of a virtual disk determines how the controller handles writes to the virtual disk. Write-back and write-through are
the two write cache policies that can be set on virtual disks individually.
All RAID volumes are presented as write-through to the operating system independent of the actual write cache policy of the virtual disk.
The Shared PERC 8 cards manage data in the cache independently of the operating system or any applications.
NOTE
: Use the Dell Chassis Management Controller (CMC) to view and manage virtual disk cache settings.
Shared PERC 8 card features 15