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A REFERENCE GUIDE FOR OPTIMIZING DELL™ SCSI SOLUTIONS
A REFERENCE GUIDE FOR OPTIMIZING DELL SCSI SOLUTIONS ............................................................... 3
1.
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2.
Identify customer usage model and needs ............................................................................................................. 4
Picking a solution based on the application profile.............................................................................................. 4
General RAID Configuration Guidelines .............................................................................................................................. 5
Application specific guidelines............................................................................................................................... 6
E-Mail Servers......................................................................................................................................................................... 6
Database Servers .................................................................................................................................................................... 7
Web Servers............................................................................................................................................................................. 8
Online Transaction Processing Servers................................................................................................................................. 9
File Servers............................................................................................................................................................................10
Streaming Media Servers......................................................................................................................................................12
Additional configuration factors.......................................................................................................................... 13
Hot Spares .............................................................................................................................................................................13
Clustering Considerations....................................................................................................................................................13
Considerations for Optimal RAID Performance.................................................................................................................13
3.
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PowerVault™ 220S & 221S Storage Enclosure................................................................................................. 14
PERC - PowerEdge™ RAID Controllers .......................................................................................................... 14
SCSI Cabling......................................................................................................................................................... 15
SCSI Hard Drive Support..................................................................................................................................... 16
3
Party Hardware support................................................................................................................................. 16
Server Support ...................................................................................................................................................... 16
4.
X
Joined Bus Topology ............................................................................................................................................ 19
Split Bus Topology................................................................................................................................................ 20
Cluster Topology .................................................................................................................................................. 21
PV22xS - Common Features and Capabilities................................................................................................... 22
SCSI ID Assignment..............................................................................................................................................................22
Multiple PV22xS Enclosures on a Single Host System .......................................................................................................23
Mixing EMM Speeds.............................................................................................................................................................23
Mixing HDD Capacities .......................................................................................................................................................24
Mixing HDD Spindle Speeds................................................................................................................................................24
SCSI Enclosure Services (SES) ............................................................................................................................................24
Warm and Hot Pluggable Features .....................................................................................................................................24
External SCSI Cables............................................................................................................................................................25
External SCSI Connector Types...........................................................................................................................................25
PV22xS Configuration Topology and Application Attributes.............................................................................................26
5.
RAID: Hardware Vs Software ............................................................................................................................. 29
Considerations to Implement a RAID Solution................................................................................................... 29
Controller Family..................................................................................................................................................................30
Data Protection Strategy ......................................................................................................................................................32
High Availability Needs - Clustering...................................................................................................................................33
Heterogeneous vs. Homogeneous environments.................................................................................................................33
Interface Channel Options - Internal/External/Multi channel device configuration........................................................34
Capacity Needs - Virtual Disk Size......................................................................................................................................35
Additional RAID information............................................................................................................................... 35
6.
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9.
Authors .................................................................................................................................................................. 43
10.
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TABLE OF CONTENTS
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VER A02
11/17/2005