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Chapter 7: Configuration Parameters

fails, the subsystem firmware automatically switches caching

mode to the conservative Write-through.

♦ Optimization Policy

 Optimization for Random I/O. More common setting. Use this

option for environments (e.g., database maintenance) with

smaller I/O transactions.

 Optimization for Sequential I/O. Used for large I/O

environments such as video recording and editing. Particularly

useful where I/O read/write must be in sequential order.

♦ Sync. Period

This option allows you to select the desired interval for the partner

controllers in a dual-controller configuration to synchronize (mirror-

copy) their cached data. RAID controllers have defaults for this;

however, this option provides more choices with the sync. period.

Controller Parameters

♦ Controller Name

A manually entered nickname for the RAID controller. This name

can also be used to recognize a RAID subsystem in an environment

where multiple RAID subsystems reside.

♦ Unique Identifier (HEX)

This is a MUST for subsystem configuration, especially for those

with dual-controllers or Fibre host ports. The unique ID is integrated

as unique Fibre Channel node name and port names. In the event of

controller failover and failback, this ID helps host-side initiators to

identify a RAID subsystem.

♦ Time Zone(GMT)

GMT (Greenwich Mean Time) is used with a 24-hour clock. To

change the clock to your local time zone, select a time from the

drop-down menu. Choose the hour later than the Greenwich Mean

Time following a plus (+) sign. For example, enter “+9” for Japan’s

time zone.

♦ Date/Time

Enter time and date in their numeric representatives in the following

order: month, day, hour, minute, and the year.

♦ SDRAM ECC

Controller 7-5

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Vicon IX 2000 L Manual de usuario Pagina 135