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Chapter Summary

  • Hard drives can be divided into different partitions, each of which function as a discrete drive with its own drive letter.

  • Tools such as FDISK, the Apple Drive Setup utility, and the Windows 2000 Disk Management utility allow you to partition fixed disks.

  • RAID (or Redundant Array of Inexpensive Disks) is a strategy for building fault tolerance into network servers such as file servers. RAID can be hardware or software based.

  • RAID 0 stripes data across multiple disks, which speeds data access but does not provide any fault tolerance.

  • RAID 1 allows you to create a mirror set, where two drives contain exactly the same data.

  • RAID 5 allows data to be striped across three or more disks; if one disk fails, the stripe set can be regenerated from parity information included on each of the other drives.

  • Performing regular data backups is the best way to build fault tolerance into a network and avoid the loss of important information.

  • A number of different backup media are available that supply different capacities.

  • Most types of backup software can be configured to do a full backup, an incremental backup, or a differential backup.

  • A backup strategy that includes full backups and/or incremental and differential backups can help ensure that a fairly up-to-date version of every file on a server can be restored in case of a disk failure.

  • An uninterruptible power supply (UPS) is used to temporarily supply power to servers in case of a power failure.



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