Two trusted domains. DFS. Error 256 character.

Jason Thompson · Joined: 27 Jan 2008 Posts: 8

I am having a 256 character issue across a DFS Link. The data will need to be moved across one way transitive trust between two domains. This has been tested and is working. I can drag and drop across the domains into the respectful folder. When I try to move the data using VV Pro it errors out with the notorious 256 character issue. I have used the unc path: \\x.x.x.x\folder e.t.c. Which follows the \\?\ theory noted in the forums. Also tested successfully plus credentials.
Any help. Thanks

TGRMN Software · Site Admin Joined: 10 Jan 2005 Posts: 8763

Hi, did you try this: http://www.tgrmn.com/web/kb/item31.htm
thanks
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Jason Thompson · Joined: 27 Jan 2008 Posts: 8

Yes, keep in mind this is accross different forest. Different subnet e.t.c.
VV works great up until it hits the 256 threshold.
The way I got it to work \\10.10.10.1\share name \data.
The trust relationship tested good. The Domain admin was added to the trusted root of the DFS structure. All works except the extended folder. Errors out with the 256 character issue. Any ideas on what to do?

Side note: \\?\ means adding the i.p address of the target, correct?
In this case you would have to, because VV Pro would not have a clue what "\\?\" is.

TGRMN Software · Site Admin Joined: 10 Jan 2005 Posts: 8763

Hi, for UNC paths use the "\\?\UNC\" prefix.
For example: \\?\UNC\<server>\<share>
\\?\UNC\10.10.10.1\share name\data\
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Jason Thompson · Joined: 27 Jan 2008 Posts: 8

I have tried: \\?\domain name\i.p address\share\folder.
I have tried: \\?\domain name\i.p address\e:\share\folder
I have tried: \\domain name\i.p address\share name\folder.

Still fails: errors,
(1)the target folder does not exist, would you like to create it.
(2)256 error
(3)unable with the creditials provided
(4)muiltiple connections are not allowed.

What does work:
\\i.p address\share\folder
Just errors out with the 256 issue.

Keep in mind. Creditintials are in place.
Distributed File System accross two domains. Same subnet.
One way transitive trust.

Thanks for the help. I am going to bed.

TGRMN Software · Site Admin Joined: 10 Jan 2005 Posts: 8763

Jason Thompson · Joined: 27 Jan 2008 Posts: 8

Define UNC?
\\?\domain name of the DFS Root\x.x.x.x\share\folder

Example: \\?\widgets\1.2.3.4\\smallwidgets\sales. This is a UNC path.

Under profile settings you have two places to input this information. From the top level you have target/sorce. Then @ the bottom you have "NETWORK" where you can test the connection. Do I leave the top level target blank and just fill in the network portion? Do I fill in:
\\x.x.x.x\share\folder @ target level then ad \\?\unc\x.x.x.x\share\folder at the network level?
Again Thanks for the help.

TGRMN Software · Site Admin Joined: 10 Jan 2005 Posts: 8763

Fill in :

\\?\UNC\x.x.x.x\share\folder @ target level

and

\\x.x.x.x\share\folder at network level (for login)

literally use \\?\UNC\ as prefix for the target

thanks
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TGRMN Software Support
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http://www.compareandmerge.com

Jason Thompson · Joined: 27 Jan 2008 Posts: 8

Yes, you were very correct. Using exactly \\?\unc\ worked.
I hate to mention this but the 256 error still rears up his head.
I am using the backup sorce to target method. Should I try a different method?

If it were a few that errored out I would leave it be, but it has over 400 256 character errors @ the end. 300 plus gigs to replicate. Massive amount of data. This is just one share.

Any suggestions, Thanks.

TGRMN Software · Site Admin Joined: 10 Jan 2005 Posts: 8763

What is the source path? thanks
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Jason Thompson · Joined: 27 Jan 2008 Posts: 8

I think I see what you are getting at.
I was using: e:\share\folder.
Now I am going to try source: \\?\UNC\server\share\folder.
I am comparing the two now, I will post a reply as soon as I exacute it.

Thanks

Jason Thompson · Joined: 27 Jan 2008 Posts: 8

Thanks for your patience. This worked combining the \\?\UNC on both source and target.
Last problem and I will leave it alone.
Issue copying Share/folder and NTFS permissions? Any resolution to this?

TGRMN Software · Site Admin Joined: 10 Jan 2005 Posts: 8763

If it is not a UNC path just use:

\\?\e:\share\folder

the prefix \\?\ is for non UNC paths , the prefix \\?\UNC\ is for UNC paths.

thanks
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TGRMN Software Support
http://www.tgrmn.com
http://www.compareandmerge.com

TGRMN Software · Site Admin Joined: 10 Jan 2005 Posts: 8763

Jason Thompson · Joined: 27 Jan 2008 Posts: 8

The 256 character issue was resolved. Much Thanks.
Copying owner and permissions over is the only error left.