FRS vs DFS

New to DFS, Have windows2008 R2 Domain controllers with main functional level with windows2003.
I have been reading few blogs which states that systole is being replicated by FRS in windows2003 .
Our client envirement uses DFS service to replicate non-sys vol shares.
I would like to find out what services is being used to replicate systole?
How do i find this?
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sara2000Asked:
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yo_beeDirector of Information TechnologyCommented:
In 2008 Domain environment DFSR replaces FRS. DFSR will replicate your Sysvol and netlogon data.  Hope this helps.
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sara2000Author Commented:
I would not call windows2008 R2 environment if the functional level is windows2003 , correct me in I am wrong.
If it windows2008 DFL then i know that sysvol is being replicated by DFSR.
I have DFS is running for file server which uses DFSR at the same time the DFL is windows2003.
I am trying to find whether systole uses FRS or DFS? How do i find that?
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David Johnson, CD, MVPOwnerCommented:
FRS has many problems
FRS detects changes via the New Technology File System (NTFS) journal, which is modified when a change is made to a file or folder in the file system. Unfortunately, FRS can't detect whether the change actually requires replication.

Applications that scan files -- including antivirus, disk defragmentation and other apps -- typically modify the security descriptor of the files, which triggers a change in NTFS journal, which in turn triggers FRS to replicate the files even though there are no changes in the files

from the dfrs console
dfsrmig.exe /getglobalstate  it will tell you what is going on
microsoft has 2 good articles
Overview
In depth
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sara2000Author Commented:
Thank you for the link.
Does the sysvol replication matter if we implant DFS either in windows2008 R2 or Windows2012 R2 file server?
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David Johnson, CD, MVPOwnerCommented:
they are different items, similar but different.
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Will SzymkowskiSenior Solution ArchitectCommented:
DFSR for domain controllers usese the same mechanism as file servers however for domain controllers this is only replicating the Sysvol and Netlogon Folders between the domain controllers and nothing else.

If you are migrating from 2003 to 2008 then DFSR is not automatic and will require you to manually upgrade to DFSR (which is recommended as post migration steps).

If you do not do this your 2008R2 DC will continue to use FRS. FRS will copy all Files in the directory New and Old. DFSR will only copy changed files so DELTA's only.

DFSR is only enabled automatically when you create a completely new domain using only 2008 or higher domain controllers. If it is a migration then you need to perform the steps manually.

Will.
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sara2000Author Commented:
If the functional level is windows2003,
Is it possible that DC uses FRS and DFS uses DFSR?
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Will SzymkowskiSenior Solution ArchitectCommented:
If you originally stated out with 2003 and you are doing a migration, now having 2008 or 2012 DC's in your environment you will be using FRS replicaiton.

DFSR replicaiton is only on by default when you have a fresh 2008 (or higher) DC environment without a migration.

Will.
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sara2000Author Commented:
Will,
Thank you, not sure whether they have upgraded from windows2003 or fresh installation of windows2008.
Some reason the domain functional level is windows2003 .
is there anyway I can find out whether it is using FRS?
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Will SzymkowskiSenior Solution ArchitectCommented:
Yeah functional level will not do much, because you can set a fresh 2008 DC with 2003 functional level and it will still use DFSR

On the DC install the DFS managment tool. Once you have this installed it will show you If sysvol is using DFSR for replication.

Will.
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