Technical information

Manual No. 775029 3-1
Chapter 3
Controller Configuration
You can use RAID EzAssist to view a controller’s current configuration
settings. Additionally, you can change certain settings on your controller.
Each Mylex Disk Array Controller is shipped from the factory with default
settings which have been found to work well in a majority of applications
and environments. However, no two environments are the same, and you
may want to modify certain settings. The best time to make such changes is
prior to doing your first drive configuration on the controller.
This chapter will discuss the following:
• Viewing Controller Configuration Information
• Changing Global Properties
• Changing SCSI Transfer Properties (for Previous Mylex PCI
Controllers)
• Changing Startup Properties
The following table is a summary of the specific properties you are able to
change along with their default values.
Table 3-1. Summary of Controller Parameters
Property Type Parameter Default Setting
Global Automatic Rebuild Management
StorageWorks Fault Management
Background Process Rate (%)
Active Negation (Previous Controllers)
Drive Size Coercion (New Controllers)
Enabled
Disabled
50
Disabled
Enabled
SCSI Transfer
a
a. For Previous Controllers, SCSI Transfer properties must be set by
controller. For New Controllers, SCSI Transfer properties of physical
devices on the controller can be set individually.
Bus Speed (MHz)
Tag Queueing
Bus Width (8=Narrow, 16=Wide)
20MHz
Yes
Negotiated Value
Startup Disk Spin Up
Number of Disk Drives per Spin
Initial Delay (seconds)
Delay Between Spins (seconds)
By Controller
2
6
0