NV Version: 7.4.x and above
OS Version: Windows 2000, Windows 2003, Windows XP
Plugin version: OFM
Description: Understanding OFM parameters
Open File Manager APM (OFM) is not a backup application, OFM does allow you to capture open and in-use files, even if they are changing during the backup – all without locking users out of applications or forcing them to log off the network. NetVault is the Backup Application, not OFM. When a backup job starts that uses OFM, before we start backing up files we will try to achieve OFM volume synchronization. There are two parameters that need to be achieved to have volume synchronization:
1. Write inactivity period (WIP), this is the time of no disk write activity to the volume in question. The default value is three seconds. Do not set this value to less then three seconds unless you are using a build OFM build 3.005 or greater. If using 3.005 or later you can set the WIP to one second. The maximum value is five seconds
2.Synchronization timeout (sync timeout), this is the maximum time allowed in which to achieve the WIP. Default value is 300 seconds (5 minutes). The sync timeout value can be increased to a value of 600 seconds (10 minutes). The sync timeout value is not dependent upon any build of OFM.
Do not be lead into the idea that you should always set the WIP to the lowest value and the sync timeout to the highest value. Again when setting the WIP to a lower value then three, verify the build of OFM. To verify the build of the OFM driver, go to: C:\WINDOWS\system32\drivers , The name of the file is 'OfmLvDrv.sys'. Right click on the file and select 'Properties'. Select the 'Version' tab to see the file version.
The WIP will need to be achieved within the time parameter of the sync timeout in order to achieve volume synchronization. If the WIP is not achieved within the time parameter of the sync timeou
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