Dell PowerVault 221S (SCSI) User Manual
Page 2
A REFERENCE GUIDE FOR OPTIMIZING DELL™ SCSI SOLUTIONS
VER A02
PAGE 2
11/17/2005
TABLE OF CONTENTS
A REFERENCE GUIDE FOR OPTIMIZING DELL SCSI SOLUTIONS............................................................... 3
1.
I
NTRODUCTION
................................................................................................................................................... 3
2.
S
TORAGE
A
PPLICATIONS AND
C
OMPONENTS
.................................................................................................... 4
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.
D
ELL
’
S
P
RODUCT
O
FFERING
............................................................................................................................14
PowerVault™ 220S & 221S Storage Enclosure.................................................................................................14
PERC – PowerEdge™ RAID Controllers ..........................................................................................................14
SCSI Cabling.........................................................................................................................................................15
SCSI Hard Drive Support.....................................................................................................................................16
3
rd
Party Hardware support.................................................................................................................................16
Server Support ......................................................................................................................................................16
4.
PV22
X
S
E
NCLOSURE
O
VERVIEW
....................................................................................................................19
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.
SCSI
H
OST
B
US
A
DAPTERS
/
SCSI
RAID.......................................................................................................29
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.
S
UMMARY AND
C
ONCLUSIONS
........................................................................................................................39
7.
A
PPENDIX
–
A:
R
EFERENCES
............................................................................................................................41
8.
A
PPENDIX
–
B:
G
LOSSARY
...............................................................................................................................42
9.
A
PPENDIX
–
C:
A
BOUT THE
D
ELL
SCSI
S
TORAGE
S
OLUTION
T
EAM
.............................................................43
Authors ..................................................................................................................................................................43
10.
A
PPENDIX
–
D:
R
EVISION
H
ISTORY
.............................................................................................................44