HP Workstations RAID Primer

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Mini White Paper

Introduction......................................................................................................................................... 2

Overview............................................................................................................................................ 2

RAID 0............................................................................................................................................ 2

RAID 1............................................................................................................................................ 2

RAID 5............................................................................................................................................ 2

RAID 10.......................................................................................................................................... 2

Summary of content (3 pages)

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HP Workstations RAID Primer Mini White Paper Introduction......................................................................................................................................... 2 Overview............................................................................................................................................ 2 RAID 0............................................................................................................................................ 2 RAID 1........
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Introduction RAID technologies are becoming a requested commodity across today’s workstations. This document details some aspects of basic RAID levels. Overview RAID either stands for Redundant Array of Independent Disks or Redundant Array of Inexpensive Disks. There are four basic RAID levels: 0, 1, 5 and 10. Over time, a number of other RAID levels have been defined as well. RAID was originally developed as a means to provide a degree of redundancy for disk data.
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RAID Level RAID 0 Typical RAID Layout Description D1[1] D1[2] D1[3] D2[1] D2[2] D2[3] D3[1] D3[2] D3[3] D4[1] D4[2] D4[3] A three drive RAID 0 configuration Striped Disk Array – 2 or more physical drives RAID 1 D1 D2 D3 D4 Mirrored Disk Array – 2 physical drives D1 D2 D3 D4 Advantages Disadvantages Typically higher performance Lack of redundancy implies that a single disk failure is unrecoverable More fault tolerant than RAID 0 Typically slower performance; half the physical disk space is used