Question

VBScript for Active Directory: Map Network Drive if it hasn't been mapped correctly

Asked by: rfwoolf

I see there's quite a few VBScripts, but none of them do what seems the most logical to me... In the sequence below i can't find a script that does (2)

My network share is \\DC\Data
I'd like this mapped as "Y:"
1) If Y: is already mapped, then
2) if it maps to '\\DC\Data' then Do nothing,
3)   else map \\DC\Data to another drive letter.

All these scripts want to remove a mapped drive if the letter exists, without checking where it's mapped to.
This is extremely stupid.
I've also seen a script that will try and map a share to 5 different drive letters, where if the first one is occupied it goes to the second drive letter, then the third and so forth. So in my example, after the script is run 5 times, I will have 5 drives all mapping to the same place.
Is this retardation or what?

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Asked On
2009-06-08 at 07:13:18ID24472200
Tags

map network drive

,

mapped drive path

Topic

Windows NT Operating System

Participating Experts
2
Points
500
Comments
15

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Answers

 

by: barryhiggins3Posted on 2009-06-08 at 07:41:18ID: 24572574

O.K.

What you need is something you can referance within the \\DC\Data, a file that all users have access to, for illustrative purposes lets say test.txt in the \\DC\Data share.

So a simple .bat file with the below should do the trick. (If Y: Already exists but is mapped to another location it will use X), you can of course change this or nest multiple checks to scan through several letters until you find one that's not being used.

IF EXIST "Y:\test.txt" exit

IF EXIST "Y:\" (
Net use X: \\DC\Data
)

NET USE Y: \\DC\Data

 

by: rfwoolfPosted on 2009-06-08 at 07:44:23ID: 24572605

Thanks barry, but your last line:
  NET USE Y: \\DC\Data
would generate an error wouldn't it if y: already existed.
what you need is an else statement after your second line.
...but not sure how to do else statements in batch code.

But yes I could use your solution I guess. Let's see if anyone's got a more 'best practise' way because this seems like a workaround, albeit a clever one.

 

by: barryhiggins3Posted on 2009-06-08 at 07:48:43ID: 24572657

Hi.

Sorry, it needs an exit to terminate if it needs to map with X: ... And the last line will map Y: to \\DC\Data if it doesnt exist it will map it.

IF EXIST "Y:\test.txt" exit

IF EXIST "Y:\" (
Net use X: \\DC\Data
Exit
)

NET USE Y: \\DC\Data

 

by: Chris-DentPosted on 2009-06-08 at 09:32:11ID: 24573821


Hmm it might be worth pointing out that if Y exists, and already points to "\\DC\Data" you'll end up with X: pointing to the same thing.

It's why it tends to be best to say Letter goes to Share, and just remove any existing connection sitting on that letter.

Chris

 

by: rfwoolfPosted on 2009-06-08 at 09:35:28ID: 24573848

" if Y exists, and already points to "\\DC\Data" you'll end up with X: pointing to the same thing."
That's precisely what I'm trying to avoid, and in barry's example this is avoided by checking if the correct file exists at Y:.

"It's why it tends to be best to say Letter goes to Share, and just remove any existing connection sitting on that letter."
--Surely this isn't best-practise? Let's say the user already had a mapped network drive that they were quite happy with, and now your script disconnects it and replaces it. I won't be very impressed ;) That's why I'm so surprised to see all these script examples doing the exact same thing: replacing mapped network drives.

 

by: Chris-DentPosted on 2009-06-08 at 12:39:06ID: 24575552


Sorry, I missed that check in there.

On why...

Ultimately it boils down to figuring out how technically happy your users are. It varies enormously, some will have no problem with it, others will not get that a particular drive letter might be different elsewhere.

It's far less likely to be a problem in a very small organisation. But I've seen instances in a much larger organisation where people have waited days for a restore job because a meaningless / arbitrary drive letter was given instead of a full path (server\share). At least if drive letters are dictated you know what someone will get, then first-level support teams can intervene and fill in the blank.

Everything is configured to make life as easy as possible for the least IT literate member of staff so they can get on with their real jobs.

Chris

 

by: rfwoolfPosted on 2009-06-09 at 08:43:07ID: 24582283

Hmm pitty nobody has offered a vbscript for this.
With batch files can I display a note when the user logs in?
And with vbscripts, it isn't running or displaying a note for my users and even when I test it on my Server I get an open file security warning dialog "Do you want to open this file? Unkown Publisher"

 

by: Chris-DentPosted on 2009-06-09 at 08:50:46ID: 24582363


Sorry, thought you were going with the batch version instead. I would still go with forcing drive letters on people though ;)

How are you displaying the note at the moment?

Chris

Dim objNetwork : Set objNetwork = CreateObject("WScript.Network")
Dim objFSO : Set objFSO = CreateObject("Scripting.FileSystemObject")
 
If objFSO.DriveExists("Y:") Then
  If objFSO.FileExists("Y:\Test.txt") Then
    WScript.Quit
  Else
    objNetwork.MapNetworkDrive "X:", "\\Server\Share"
  End If
Else
  objNetwork.MapNetworkDrive "Y:", "\\Server\Share"
End If

                                              
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by: rfwoolfPosted on 2009-06-09 at 08:54:35ID: 24582397

Thanks Chris.

Here's how I'm displaying the note now - a test works on the server, but I haven't had it work on any of my clients. To be honest I've only rolled out on 2 clients. So it could just be 2 dud PCs...

WScript.Echo("WELCOME." & vbCr & _
"Your user has been authenticated by the new server in ThisPlace." & vbCr & _
"We hope that this new system will improve security, data redundancy, efficiency, and in some ways make your life easier..." & VbCr & vbCr & _
"Please note:" & vbCr & vbCr & _
"1. Your old user's profile such as your Desktop and My Documents files have been copied / moved to your new user." & vbCr & vbCr & "2. Some of you have their Desktop and My Documents folders 'redirected' to the server. This means any files you put in those locations get automatically backed up onto the server, so your data is easily backed up and accessible from anywhere. To prevent this from happening (for privacy or other reasons), please ask your Domain Administrator." & vbCr & vbCr & _
"3. You should now notice a new drive called 'Y:' inside 'My Computer'. This virtual drive shows you the files on the server. Please note the following folders:" & vbCr & _
" - 'Departments': The various departments in the company, such as Sales, Marketing, Finance, Admin etc. will each have their own folder to share files. Please take advantage of this by organising your files in these locations." & vbCr & _
" - 'Projects': A central place to store documents pertaining to company projects." & vbCr & _
" - 'Scans': A central place to store scanned documents from the printer in Thisplace. You can use '14' on the scanner to scan to this folder on the server." & vbCr & " - 'Shared': A general shared area for standard documents used throughout the organisation." & vbCr _
& vbCr & _
"For any issues, please speak to Jack.") 
                                              
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by: Chris-DentPosted on 2009-06-09 at 08:58:10ID: 24582446


Odd, it should let you run that as a logon script, nothing odd about it.

Chris

 

by: rfwoolfPosted on 2009-06-09 at 09:15:04ID: 24582616

Yeah it's not working. And yet my folder redirection is working on this PC, not on another Pc. It's weird.
I've checked the GPOs about 3 times now.

 

by: rfwoolfPosted on 2009-06-09 at 09:40:41ID: 24582921

Looking at the event viewer I get a few error messages:

Event Type:      Error
Event Source:      Userenv
Event Category:      None
Event ID:      1054
Date:            9/06/2009
Time:            6:31:51 PM
User:            NT AUTHORITY\SYSTEM
Computer:      ONE
Description:
Windows cannot obtain the domain controller name for your computer network. (The specified domain either does not exist or could not be contacted. ). Group Policy processing aborted.

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.

===

Event Type:      Error
Event Source:      UserInit
Event Category:      None
Event ID:      1000
Date:            9/06/2009
Time:            6:31:51 PM
User:            N/A
Computer:      ONE
Description:
Could not execute the following script MapNetworkDrive.vbs. The system cannot find the file specified.
.

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
===

Event Type:      Error
Event Source:      Userenv
Event Category:      None
Event ID:      1054
Date:            9/06/2009
Time:            6:25:27 PM
User:            NT AUTHORITY\SYSTEM
Computer:      ONE
Description:
Windows cannot obtain the domain controller name for your computer network. (The specified domain either does not exist or could not be contacted. ). Group Policy processing aborted.

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.

 

by: Chris-DentPosted on 2009-06-09 at 09:43:26ID: 24582950


Okay, that'd do it.

I saw some of your earlier posts when you were setting this up, but just to confirm... which DNS servers have you given to your client? It should only be Domain Controller because the client needs to able to get information from that about where the DC is and such.

Chris

 

by: rfwoolfPosted on 2009-06-09 at 10:13:16ID: 24583294

Chris:
On my LAN's router, I have hardcoded the primary and secondary DNS as follows:
Primary DNS is from the service provider,
Secondary DNS is the Windows Server 2008's IP on the network, i.e. 192.168.0.200
I have verified that the Server is on that address using ipconfig

For my one client I do the exact same on his Local Area Connection, and his GPO doesn't work at all,
whereas on mine -- I'm busy checking (have to log off this user)

 

by: Chris-DentPosted on 2009-06-09 at 10:16:59ID: 24583343


You must only give the client DNS servers that are able to answer for the AD domain. Anything else causes problems like this. It does mean you don't have a backup DNS service, but that can't be helped without having another DNS server.

The trouble is, the DNS client won't pick a DNS server that is able to provide a good response, it will use whichever is convenient, sometimes the ISPs server, sometimes the local server. If it asks the ISPs server it'll remember the answer it got (which will be NXDOMAIN / doesn't exist) and hold onto that for 5 minutes before it thinks about trying to ask again.

Chris

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