Controller:

The controller here refers to the RAID controller unit(s) that power the RAID subsystems. The configuration changes you make here have dramatic effects on array performance.

- Caching Parameters -

Write-Back Cache
: Write-back can improve disk write performance by caching and sorting the host writes and efficiently distributing them to hard drives at appropriate time. Write-back is configurable on a per array (logical drive) basis. The value you set here becomes the default for all configured arrays. If an array write policy is set to "default," the value you enter here will be automatically applied.

Optimization: Controller internal parameters, like I/O processing behaviors and stripe size, have been tuned for the two application categories, Random and Sequential. Choosing either of these optimization modes should suffice most application needs. The optimization mode can also be applied on a per logical drive bassis.

Sync. Period (Sec): This option is applied for dual-redundant controller configuration where partner controllers constantly synchronize cached contents. If a specific time period is set, controllers will flush the cached writes at preset intevals.

- Controller Parameters -

Controller Name: Using a name helps administrators to recognize a subsystem in a multi-RAID environment.

Unique Identifier(HEX): This is a must for any Infortrend RAID subsystems especially with models featuring Fibre host channels. This ID becomes a part of host port "port name" to prevent host computers to mis-address system FC ports. Applicable numbers range from "0" to "FFFFF." Make sure each subsystem has a unique ID in your networked environment.

Time Zone(GMT): GMT (Greenwich Mean Time) is used here, 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 Japanese time zone

Date/Time: Enter time and date in its numeric representatives in the following order: month, day, hour, minute, and the year.

SDRAM ECC: If the DIMM module installed for data caching supports ECC, you may select to enable or disable the error check function here.

Apply: Click this button for the configuratoin to take effect.

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