Grass Valley K2 Summit 3G v.8.0 - Manual (Page 50)

About the write filter
The K2 Summit 3G system has a file-based write filter, which is a feature of the Windows embedded
operating system. With the write filter enabled, files can be created, modified, and deleted, but these
changes are held in a memory cache. When the K2 system restarts, these changes are lost and the
K2 system returns to its original state. This protects the K2 system from changes and increases
on-air reliability. For any system configuration change the write filter must be disabled otherwise
changes are lost at the next restart.
Some directories, such as C:\logs , C:\Profile\config , and C:\Profile\ChannelSuites , are
excluded from write filter protection, so that channel configuration and logs are saved. Do not
attempt to alter this list of excluded directories. If you suspect that write filter configuration has
been altered, use the recovery image process to restore to the default configuration.
To enable the write filter, the K2 system must be restarted. Likewise, to disable the write filter, the
K2 system must be restarted. You can enable/disable the write filter remotely using the K2Config
application or by using the SiteConfig application lock/unlock feature. The SiteConfig lock/unlock
feature applies to one K2 system at a time or on a group of K2 systems all at once. You can also
enable/disable the write filter from a local K2 system, but if you use the local method, do not also
use the SiteConfig method. If you enable/disable the write filter locally, the change is not
automatically sent to SiteConfig, so SiteConfig can not reliably indicate the current lock/unlock
state.
Enable write filter
Prerequisite:
• K2 software must be installed on the K2 Summit 3G system.
1. If you have not already done so, log on to the K2 Summit 3G system with Windows administrator
privileges.
2. From the Windows desktop, click Start | All Programs | Grass Valley | Write Filter Utility .
FBWF Manager opens.
3. Under Filter Settings, set Filter to Enable .
4. Under Protected Volumes, set C: to Protected .
Do not modify other settings.
5. Click OK .
6. When prompted, restart the K2 system.
Disable write filter
Prerequisite:
• K2 software must be installed on the K2 Summit 3G system.
1. If you have not already done so, log on to the K2 Summit 3G system with Windows administrator
privileges.
50 K2 Summit 3G Production Client Service Manual 02 February 2012
Service procedures