Grass Valley K2 Summit Client Service Manual Nov.23 2009 - Manual (Page 47)

12 October 2009 K2 Summit Production Client Service Manual 47
Chapter
3
Service Procedures
Topics in this section include the following:
• “About the write filter” on page 47
• “Enabling the write filter” on page 48
• “Disabling the write filter” on page 48
• “Committing a file to disk with write filter enabled” on page 48
• “Exporting log files” on page 49
• “Replacing a RAID 0 drive” on page 51
• “Replacing a RAID 1 drive” on page 51
• “About networking” on page 52
• “Restoring network configuration” on page 53
• “Checking services” on page 62
• “Checking pre-installed software” on page 64
• “Making CMOS settings” on page 65
• “Using recovery images” on page 65
• “Installing the Fibre Channel card driver” on page 70
• “Using diagnostic tools” on page 72
About the write filter
The K2 Summit Client 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
Summit Client restarts, these changes are lost and the K2 Summit Client returns to its
original state. This protects the K2 Summit Client 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 Summit Client must be restarted. Likewise, to
disable the write filter, the K2 Summit Client must be restarted. You can enable/
disable the write filter remotely using the SiteConfig lock/unlock feature on one K2
Summit Client at a time or on a group of K2 Summit Clients all at once. You can also
enable/disable the write filter from a local K2 Summit Client.