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Chapter 7:
Technology Background
213
․
Pre-Press Applications
․
Any application requiring high bandwidth
RAID 1
Advantages Disadvantages
Simplest RAID storage subsystem
design
Can increase read performance by
processing data requests in parallel
since the same data resides on two
different drives
Very high disk overhead - uses only
50% of total capacity
Recommended applications for RAID 1:
․
Accounting/Financial
․
Payroll
․
Any application requiring very high availability
RAID 5
Advantages Disadvantages
High Read data transaction
rateMedium Write data transaction
rateGood aggregate transfer
rateMost versatile RAID level
Disk failure has a medium impact on
throughput
Recommended applications for RAID 5:
․
File and Application servers
․
WWW, E-mail, and News servers
․
Intranet servers
RAID 10
Advantages Disadvantages
Implemented as a mirrored RAID
Volume whose segments are RAID 0
RAID Volumes High I/O rates are
achieved thanks to multiple stripe
segments
Very high disk overhead - uses only
50% of total capacity
Recommended applications for RAID 10:
․
Imaging applications
․
Database servers
․
General fileserver