Product specifications

Terminal Operation
4-5
4.2.5 Periodic Cache Flush
Figure 4 - 4: Periodic Cache Flush Page
If Write-back caching is preferred for better performance yet data integrity
is also a concern, e.g., no battery protection, the system can be configured
to flush the cached writes at preset intervals.
Note that the “Continuous Sync” option holds data in cache for as long as
necessary to complete a write operation and immediately commits it to
hard drives if it does not come in a series of sequential write requests.
IMPORTANT!
• If the size of an array is larger than 16TB, only the optimization
for sequential I/O can be applied. Since a logical drive of this
size may not be practical, there is actually no limitation on the
combination of optimization mode and array capacity.
• Every time you change the Caching Parameters you must reset
the controller for the changes to take effect.
• The Adaptive Write Policy is applicable to subsystems working
under normal conditions. If, for example, a drive fails in an
array, the firmware automatically restores the array’s original
write policy.