Users Guide

Table Of Contents
PERC Capability CEM configuration Capable
Controller (PERC 9.1 or later)
CEM configuration Non-capable
Controller (PERC 9.0 and lower)
If there is no existing pending or
scheduled jobs for the controller, then
configuration is applied.
If there are pending or scheduled jobs
for that controller, then the jobs have
to be cleared or you must wait for the
jobs to be completed before applying
the configuration at run-time. Run-time
or real-time means, a reboot is not
required.
Staged If all the set operations are staged, the
configuration is staged and applied after
reboot or it is applied at real-time.
Configuration is applied after reboot
Topics:
Understanding RAID concepts
Supported controllers
Supported enclosures
Summary of supported features for storage devices
Inventorying and monitoring storage devices
Viewing storage device topology
Managing physical disks
Managing virtual disks
Managing controllers
Managing PCIe SSDs
Managing enclosures or backplanes
Choosing operation mode to apply settings
Viewing and applying pending operations
Storage devices apply operation scenarios
Blinking or unblinking component LEDs
Understanding RAID concepts
Storage Management uses the Redundant Array of Independent Disks (RAID) technology to provide Storage Management
capability. Understanding Storage Management requires an understanding of RAID concepts, as well as some familiarity with
how the RAID controllers and operating system view disk space on your system.
What is RAID
RAID is a technology for managing the storage of data on the physical disks that reside or are attached to the system. A key
aspect of RAID is the ability to span physical disks so that the combined storage capacity of multiple physical disks can be
treated as a single, extended disk space. Another key aspect of RAID is the ability to maintain redundant data which can be
used to restore data in the event of a disk failure. RAID uses different techniques, such as striping, mirroring, and parity, to
store and reconstruct data. There are different RAID levels that use different methods for storing and reconstructing data. The
RAID levels have different characteristics in terms of read/write performance, data protection, and storage capacity. Not all
RAID levels maintain redundant data, which means for some RAID levels lost data cannot be restored. The RAID level you choose
depends on whether your priority is performance, protection, or storage capacity.
NOTE:
The RAID Advisory Board (RAB) defines the specifications used to implement RAID. Although RAB defines the RAID
levels, commercial implementation of RAID levels by different vendors may vary from the actual RAID specifications. An
implementation of a particular vendor may affect the read and write performance and the degree of data redundancy.
Managing storage devices 191