Dell PowerEdge R830 Integrated Remote Access Controller 8 Version 2.70.70.70 U - Page 179
Understanding RAID concepts, RAID
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PERC Capability Staged CEM configuration Capable Controller CEM configuration Non-capable (PERC 9.1 or later) Controller (PERC 9.0 and lower) completed before applying the configuration at run-time. Run-time or real-time means, a reboot is not required. 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 Related concepts Understanding RAID concepts Inventorying and monitoring storage devices Viewing storage device topology Managing controllers Managing physical disks Managing enclosures or backplanes Managing PCIe SSDs Managing virtual disks Blinking or unblinking component LEDs Related reference Supported controllers Supported enclosures Summary of supported features for storage devices 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. 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 Managing storage devices 179
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