December 2002
Intermediate to advanced
260 pages
9h 18m
English
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RAID-1: Mirroring
RAID-1 (mirroring) stores an exact replica of all data on a separate disk or disks. This practice provides complete data redundancy in the event of a disk failure. However, because data must be written to disk more than once, there is a write performance hit, which increases as you add disks. On the other hand, read operations can be done in parallel so that read performance improves (compared to that of a single disk), depending on the number of disks in the mirror.
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