HSG80 ACS Solution Software V8.6 for Windows NT and Windows 2000 Installation and Configuration Guide

2–12 HSG80 ACS Solution Software Version 8.6 for Windows NT and Windows 2000 Installation and
Configuration Guide
Table 2–1 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.
Creating a Storageset Profile
Creating a profile for your storagesets, partitions, and devices can simplify the
configuration process. Filling out a storageset profile helps you choose the storagesets that
best suit your needs and to make informed decisions about the switches you can enable for
each storageset or storage device that you configure in your subsystem.
See the example storageset profile shown in Figure 2–9. Appendix A contains blank
profiles that you can copy and use to record the details for your storagesets. Use the
information in this chapter to help you make decisions when creating storageset profiles.
Table 2–1 A 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