HSG80 ACS Solution Software Version 8.7 for Compaq Tru64 UNIX Installation and Configuration Guide

Table Of Contents
Planning Storage Configurations
2–15HSG80 ACS Solution Software Version 8.7 for Compaq Tru64 UNIX Installation and
Configuration Guide
2–15
Table 2–5 compares the different kinds of containers to help you determine which
ones satisfy your requirements.
For a comprehensive discussion of RAID, refer to The RAIDBOOK—A Source Book
for Disk Array Technology.
Table 2–5: Comparison of Container Types
Container
Name
Relative
Availability
Request Rate
(Read/Write)
I/O per
second
Transfer Rate
(Read/Write)
MB
per second
Applications
Independent
disk drives
(JBOD)
Equal to
number of
JBOD disk
drives
Comparable to
single disk
drive
Comparable to
single disk
drive
Stripeset
(RAID 0)
Proportionate
to number of
disk drives;
worse than
single disk
drive
Excellent if
used with
large chunk
size
Excellent if
used with
small chunk
size
High
performance
for non-critical
data
Mirrorset
(RAID1)
Excellent Good/Fair Good/Fair System drives;
critical files
RAIDset
(RAID 3/5)
Excellent Excellent/good Read:
excellent
(if used with
small chunk
sizes)
Write: good (if
used with
small chunk
sizes)
High request
rates,
read-intensive,
data lookup
Striped
Mirrorset
(RAID 0+1)
Excellent Excellent if
used with
large chunk
size
Excellent if
used with
small chunk
size
Any critical
response-time
application