Introduction to RAID RAID Levels RAID Configuration Strategies RAID Availability Concept Configuration Planning RAID is an array, or group, of multiple independent physical drives that provide high performance and fault tolerance. A RAID drive group improves I/O performance and reliability. The RAID drive group appears to the host computer as a single storage unit or as multiple virtual units. I/O is expedited because several drives can be accessed simultaneously. RAID Benefits RAID drive groups improve data storage reliability and fault tolerance compared to single-drive storage systems. Data loss resulting from a drive failure can be prevented by reconstructing missing data from the remaining drives. RAID improves I/O performance and increases storage subsystem reliability. RAID Functions Virtual drives are drive groups or spanned drive groups that are available to the operating system. The storage space in a virtual drive is spread across all of the drives in the drive group. Your drives must be organized into virtual drives in a drive group, and they must be able to support the RAID level that you choose. Some common RAID functions follow: Creating hot spare drives. Configuring drive groups and virtual drives. Initializing one or more virtual drives. Accessing controllers, virtual drives, and drives individually. Rebuilding failed drives. Verifying that the redundancy data in virtual drives using RAID 1, RAID 5, and RAID 10 is correct. Reconstructing virtual drives after changing RAID levels or adding a drive to a drive group. Selecting a host controller on which to work.
Introduction to RAID
RAID is an array, or group, of multiple independent physical drives that provide high performance and fault tolerance. A RAID drive group improves I/O performance and reliability. The RAID drive group appears to the host computer as a single storage unit or as multiple virtual units. I/O is expedited because several drives can be accessed simultaneously.
RAID Benefits
RAID drive groups improve data storage reliability and fault tolerance compared to single-drive storage systems. Data loss resulting from a drive failure can be prevented by reconstructing missing data from the remaining drives. RAID improves I/O performance and increases storage subsystem reliability.
RAID Functions
Virtual drives are drive groups or spanned drive groups that are available to the operating system. The storage space in a virtual drive is spread across all of the drives in the drive group.
Your drives must be organized into virtual drives in a drive group, and they must be able to support the RAID level that you choose. Some common RAID functions follow:
Creating hot spare drives.
Configuring drive groups and virtual drives.
Initializing one or more virtual drives.
Accessing controllers, virtual drives, and drives individually.
Rebuilding failed drives.
Verifying that the redundancy data in virtual drives using RAID 1, RAID 5, and RAID 10 is correct.
Reconstructing virtual drives after changing RAID levels or adding a drive to a drive group.
Selecting a host controller on which to work.