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Microsoft® Exchange Server 2003 Scalability with SP1 and SP2
book

Microsoft® Exchange Server 2003 Scalability with SP1 and SP2

by Pierre Bijaoui
October 2006
Intermediate to advanced content levelIntermediate to advanced
600 pages
23h 55m
English
Digital Press
Content preview from Microsoft® Exchange Server 2003 Scalability with SP1 and SP2
4.8 The value of RAID 293
Chapter 4
the RAID set and is a simple logical XOR of each data block of each vol-
ume. This parity information is stored in place of data in a member of a
RAID5 set. Whereas RAID3 dedicates a drive for storing parity, RAID5
distributes the parity across all members of a disk. Locating the parity on a
single drive can quickly turn that drive into a hot spot where time is spent
waiting for the total write operation to complete.
When data must be read from a RAID5 volume, the performance and
access pattern of the disk drive is similar to a regular stripe set (RAID0).
The big difference comes when data must be written or updated ...
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Publisher Resources

ISBN: 9781555583002