Adaptec 3210S User Guide - Page 134

Array Selection Examples, Need or, System Use, Definition, Suggested Configuration

Page 134 highlights

Adaptec Storage Manager Pro User's Guide Array Selection Examples The examples in this section show you how to use the array selection criteria to determine the optimum array type for specific networking environments. You may find these examples useful in determining the array type that best meets your needs. See Understanding the Array Selection Criteria on page B-8. Generally, most users who require fault tolerance prefer RAID 5 configurations because of the reduced cost overhead. Users who do not require fault tolerance usually use the stripe set. Need or System Use Missioncritical data Application server Developer environment Mail server Definition Users must have access to data, and fault tolerance is the highest priority. Users access applications from the server, but they store their data on their local disk drives; requires high sequential-read performance. Users transfer data from the server to their local disk drives, modify the data, and return it to the server; requires high random-read and -write performance and fault tolerance. Users log in to the server to read their mail, and the server transfers the mail files to the user's local disk drive; requires high random-read and -write performance and fault tolerance. Suggested Configuration •Stripe set of mirror sets (RAID 0/1) (highest write performance) •Stripe set of RAID 5 sets (RAID 0/5) •Mirror set (RAID 1) •RAID 5 set •Stripe set of mirror sets (RAID 0/1) •Mirror set (RAID 1) •Stripe set of RAID 5 sets (RAID 0/5) •RAID 5 set •Stripe set of RAID 5 sets (RAID 0/5) •Mirror set (RAID 1) •RAID 5 set •Stripe set of RAID 5 sets (RAID 0/5) •Mirror set (RAID 1) •RAID 5 set B-4

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B-4
Adaptec Storage Manager Pro User
s Guide
Array Selection Examples
The examples in this section show you how to use the array
selection criteria to determine the optimum array type for specific
networking environments. You may find these examples useful in
determining the array type that best meets your needs. See
Understanding the Array Selection Criteria
on page B-8.
Generally, most users who require fault tolerance prefer RAID 5
configurations because of the reduced cost overhead. Users who do
not require fault tolerance usually use the stripe set.
Need or
System Use
Definition
Suggested Configuration
Mission-
critical data
Users must have access to
data, and fault tolerance is
the highest priority.
Stripe set of mirror sets
(RAID 0/1) (highest
write performance)
Stripe set of RAID 5
sets (RAID 0/5)
Mirror set (RAID 1)
RAID 5 set
Application
server
Users access applications
from the server, but they
store their data on their local
disk drives; requires high
sequential-read
performance.
Stripe set of mirror sets
(RAID 0/1)
Mirror set (RAID 1)
Stripe set of RAID 5
sets (RAID 0/5)
RAID 5 set
Developer
environment
Users transfer data from the
server to their local disk
drives, modify the data, and
return it to the server;
requires high random-read
and -write performance and
fault tolerance.
Stripe set of RAID 5
sets (RAID 0/5)
Mirror set (RAID 1)
RAID 5 set
Mail server
Users log in to the server to
read their mail, and the
server transfers the mail files
to the user
s local disk drive;
requires high random-read
and -write performance and
fault tolerance.
Stripe set of RAID 5
sets (RAID 0/5)
Mirror set (RAID 1)
RAID 5 set