Compaq External RAID Controller & Subsystem Infortrend, Руководство по эксплуатации

Страница: 69 / 347

Front Panel Operation
5-1
LCD Keypad Operation
5.1 Power on RAID Enclosure
Before you start to configure a RAID system, make sure that
hardware installation is completed before any configuration takes
place. Power on your RAID enclosure.
5.2 Caching Parameters
Optimization Modes
Mass storage applications can be categorized into two according to
its read/write characteristics: database and video/imaging. To
optimize the controller for these two categories, the controller has
two embedded optimization modes with controller behaviors
adjusted to different read/write parameters. They are the
Optimization for Random I/O and the Optimization for Sequential
I/O.
Limitations:
There are limitations on the use of optimization
modes.
1.
You can select the stripe size of each array (logical drive) during
the initial configuration. However, changing stripe size is only
recommended for experienced engineers who have tested the
effects tuning stripe sizes for different applications.
2.
The array stripe size can only be changed during the initial
configuration process.
3.
Once the controller optimization mode is applied, access to
different logical drives in a RAID system will follow the same
optimized pattern. You can change the optimization mode later
without having to re-organize your array.
Chapter Chapter Chapter Chapter
5555