Chapter 1. Introducing the 3ware® 9000 Series Controller
14 3ware Serial ATA RAID Controller User Guide
choose a time for these tasks to be run when it will be least disruptive to
your system. You can also define the rate at which background tasks are
performed, specifying whether I/O tasks should be given more processing
time, or background rebuild and verify tasks should be given more
processing time.
•
Write Cache. Write cache can be enabled or disabled using 3BM 2,
3DM 2 and CLI. When write cache is enabled, data will be stored in
system cache, 3ware controller cache, and drive cache before the data is
committed to disk. This allows the system to process multiple write
commands at the same time, thus improving performance. However when
data is stored in cache, it could be lost if a power failure occurred. With a
Battery Backup Unit (BBU) installed, the cache stored on the 3ware
controller can be restored.
•
StorSave Profiles allow you to set the level of protection versus
performance that is desired for a unit when write cache is enabled
(9550SX and 9590SE controllers only). For more information, see
“Setting the StorSave Profile for a Unit” on page 149.
•
Drive Locate. When the I
2
C port on the controller has been connected to
a chassis with a Chassis Control Unit (CCU), you can issue drive locate
commands that blink the LEDs for particular drives, so that you can
quickly identify what drive needs to be checked or replaced (9550SX and
9590SE controllers only).
•
Auto-Rebuild. For times when you do not have a spare available, setting
the auto-rebuild policy allows rebuilds to occur with an available drive or
with a failed drive (9550SX and 9590SE controllers only).
To Next Page
Loading...
