User's Manual

• PERC 6/E
• PERC 6/I controller family
• SAS 6/iR controller family
• PERC S100, S110, and S300 controllers
• PERC H200, H700, and H800 controllers
• PERC H310 Adapter, PERC H310 Mini Monolithic, PERC H310 Mini Blades, PERC H710 Adapter, PERC
H710 Mini Blades, PERC H710 Mini Monolithic, PERC H710P Adapter, PERC H710P Mini Blades, PERC
H710P Mini Monolithic, and PERC H810 Adapter controllers
• PERC H730P Adapter
RAID Controller Features
Different controllers have different features. If you have more than one controller attached to your
system, you may notice that the tasks displayed on the Information/Configuration page of the controller
are different for each controller.
Controllers may also have differences in their read, write, and cache policies as well as how they handle
hot spares. You should be aware of these differences when creating virtual disks and assigning hot spares.
The following describes some of the RAID controller features and provides links to a more detailed
explanation. For information on the features supported by the controllers, see Supported Features.
• Hot spares — On RAID controllers, a hot spare is a backup for a disk that fails. See Protecting Your
Virtual Disk With A Hot Spare.
• Rebuilding data — You can rebuild data from a failed physical disk if the disk is a member of a
redundant virtual disk. See Rebuilding Redundant Information.
• Virtual disk expansion — Virtual disk expansion enables you to expand the capacity of a virtual disk
while it remains online by adding additional disks to the virtual disk. This feature is also known as
online capacity expansion (OLCE). See Virtual Disk Tasks.
• RAID migration — After creating a virtual disk, you can change the RAID level. See Reconfiguring Or
Migrating Virtual Disks.
• Moving physical and virtual disks to another controller — This feature enables you to move the
physical and virtual disks from one system to another. See Moving Physical And Virtual Disks From
One System To Another.
• Read, write, and cache policies — The manner in which a controller reads and writes data can vary.
The read, write, and cache policies have implications for data encryption and system performance.
See RAID Controller Read, Write, Cache, And Disk Cache Policy.
• Check consistency — A check consistency determines the integrity of the redundant data on a virtual
disk. When necessary, this feature rebuilds the redundant information. See Maintaining The Integrity
Of Redundant Virtual Disks.
• Patrol Read — Patrol read identifies disk errors to avoid disk failures, data loss, or corruption. For more
information, see Setting The Patrol Read Mode.
• Disk migration or foreign configurations — Some controllers enable you to move physical disks that
contain one or more virtual disks to another controller. The receiving controller is able to recognize
and import the foreign configuration (virtual disks). For more information, see Foreign Configuration
Operations.
Controller — Supported RAID Levels
RAID controllers may support different RAID levels. For information on supported RAID levels for a
controller, see Supported Features.
62