On this link is all the information you would ever need for chkdsk.
If ever you want info on Microsoft check the knowledge base.
http://technet.microsoft.com/en-us/library/bb457122.aspx
Here are details of the five passes.
Phase 1: Checking files
During its first pass, Chkdsk examines each file record segment in the volume's master file table (MFT) and examines it for internal consistency. At the end of this phase, Chkdsk has identified the space that is in use and the space that is available, both within the MFT and on the volume as a whole.
Phase 2: Checking indexes (directories)
During this pass, Chkdsk examines each directory that is on the volume, checking for internal consistency and verifying that every file and directory that is represented by a file record segment in the MFT is referenced by at least one directory. Chkdsk confirms that every file or subdirectory that is referenced in a directory actually exists as a valid file record segment in the MFT and also checks for circular directory references. Finally, Chkdsk confirms that the time stamps and file size information for the files are up-to-date in the directory listings for those files.
Phase 3: Checking security descriptors
During this phase, Chkdsk examines each security descriptor that is associated with files or directories on the volume. Security descriptors contain information about ownership of a file or directory, about NTFS permissions for the file or directory, and about auditing for the file or directory.
Phases 4 and 5: Checking sectors (optional)
If the /R switch is in effect, Chkdsk runs two more passes to look for bad sectors. During stage 4, Chkdsk verifies all clusters in use; during stage 5, Chkdsk verifies unused clusters. Note that this process can be quite lengthy. taking many hours.
I am sure your setup is complex.
You have however I think missed the point. Chkdsk will not run automatically unless the system deems it necessary, for instance - a forced power off. Shuting down when updates are being installed.
etc.
The point I was making was - WHY would anyone want to schedule a chkdsk. I just run it when needed.and thankfully that is
very infrequently.
If you really decide to GO with it.
http://www.windows-help-central.com/windows-xp-chkdsk.html