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Contents
Common SCSI Bus Problems 6-3
Terminal Emulator and COM Port Problems 6-6
Host SCSI Channel Problems 6-8
Device SCSI Channel Problems 6-9
Problems During Bootup 6-9
Controller Problems 6-11
Common Problems and Interpreting the LEDs 6-12
Warning and Error Events 6-13
Disk Errors 6-16
Disk Channel Errors 6-17
Theory of Controller Operation
Operating Modes Overview A-2
Operating Modes – DuraStor 6320SS A-4
Stand-Alone Mode A-4
Active-Active Mode A-7
Active-Passive Mode A-11
Operating Modes – DuraStor 7320SS A-14
Stand-Alone Mode A-14
Active-Active Mode A-16
Active-Passive Mode A-21
Understanding Mirrored Operations A-24
Clustering A-25
Minimizing Downtime for Maximum Data
Availability A-25
How Available are Clusters? A-27
Application of Availability A-27
(DuraStor 7320SS only)
Active-Active Dual-Port Mode for SAN B-2
Hubs Enabled B-3
Hubs Disabled B-5
Active-Active Single-Port Mode for SAN B-7
Hubs Disabled (Single-Port Hosts and One Switch) B-7
DuraStor IUG - Online.book Page v Friday, July 19, 2002 3:06 PM