Lenovo ThinkServer RD240 MegaRAID SAS Software User Guide - Page 34
Components and Features, 2.4.1 Physical Array, 2.4.2 Virtual Drive, Virtual Drive - parts
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Your drives must be organized into virtual drives in a drive group and they must be able to support the RAID level that you select. Below are some common RAID functions: • 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 level 1, 5, 6, 10, 50, or 60 is correct • Reconstructing virtual drives after changing RAID levels or adding a drive to a drive group • Selecting a host controller to work on 2.4 Components and Features RAID levels describe a system for ensuring the availability and redundancy of data stored on large disk subsystems. See Section 2.5, "RAID Levels," for detailed information about RAID levels. The following subsections describes the components of RAID drive groups and RAID levels. 2.4.1 Physical Array A physical array is a group of drives. The drives are managed in partitions known as virtual drives. 2.4.2 Virtual Drive A virtual drive is a partition in a drive group that is made up of contiguous data segments on the drives. A virtual drive can consist of an entire drive group, more than one entire drive group, a part of a drive group, parts of more than one drive group, or a combination of any two of these conditions. 2-2 Introduction to RAID
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