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Apple Pro Training Series: Xsan Quick Reference Guide by Matthew Geller, Adam Green

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Chapter 4. Setting Up Your Storage

The Apple Xserve RAID (redundant array of independent disks) is a group of hard drives that appears to the host Power Mac as a single highspeed storage unit. RAID systems enable you to increase storage capacity and get the performance, reliability, and data protection needed for video production, which is not possible from a single hard drive. RAID drives inside the array operate simultaneously, increasing overall throughput. Some or all of the following techniques are used in RAID technology:

  • RAID level 0: Striping data across multiple drives for storage performance

  • RAID level 1: Mirroring for redundancy

  • RAID level 3 and 5: Parity for data protection (plus others)

Most RAID configurations combine these techniques ...

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