Specifications

50 en | LCD Keypad Operation SCSI to SATA RAID Subsystem | Administrator’s Manual
F.01U.027.802 | V1 | 2006.11 Bosch Security Systems
Write-back caching can dramatically improve write performance by caching the unfinished
writes in memory and letting them be committed to drives latter in a more efficient manner. In
the event of power failure, a battery module can hold cached data for days. In the event of
controller failure in a dual-active configuration, data cached in the failed controller has an
exact replica on its counterpart controller and therefore remains intact.
5.2.5 Periodic Cache Flush
If for a reason Write-Back caching is preferred for better performance and yet data integrity is
of the concern, e.g., lack of the battery protection, the system can be configured to flush the
cached writes at every preset interval.
Note that the “Continuous Sync” option holds data in cache for as long as necessary to com-
plete a write operation and immediately commits it to hard drives if it does not come in a
series of sequential writes.
Select from Main Menu “View and Edit Config Parms,” “Caching Parameters,” and press ENT.
Use the arrow keys to scroll through the options and select “Periodic CachFlush Time”, and
then press ENT to proceed. The “Set Cache Flush Time – Disable” appears. The default is “Dis-
able.” Use your arrow keys to select an option from “ConSync,” “1/2min,” to “10min.” “Con-
Sync” stands for “continuously synchronized.” Press ENT to select and press ESC to leave and
the setting will take effect immediately.
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NOTICE!
Every time you change the caching parameters, you must reset the controller for the changes
to take effect.