clients running XP can map EMC SAN drives but Windows7 cannot

We are able to use Windows XP boxes as clients to map drives on an EMC SAN, but not from Windows7 or server 2008R2

If we put the IP address into the "map network drive" window of XP as \\x.x.x.x  we can browse the drive and see available directories (prior to entering a user name and password).

When we do the same from a Win7 box or from a server 2008R2 box,  we get network path not found.

The XP box and the Windows 7 and Server 2008 R2 boxes are sitting next to each other on the same segment, and are members of the same domain.

     The Win7 and Server 2008 boxes can ping the SAN.

Is there something different about how Win7 maps drives compared to XP that is preventing the Win7 box from seeing the SAN.

There must be settings on Win7 that need to be changed.
dakota5Asked:
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gurutcCommented:
It could be SMB V2 or SMB signing causing your woes.

Disable SMB signing:  http://support.microsoft.com/kb/982860

Disable SMB V2:  http://gaurang-microsofttechnology.blogspot.com/2012/06/how-to-disable-smb-20-on-windows-72008.html

Hope this helps!

- gurutc
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JohnBusiness Consultant (Owner)Commented:
Windows 7 maps drives and folders much like XP.

1. Go to Control Panel, Network and Sharing Center, Advanced Sharing Settings and make sure that (a) you are on a Work or Domain Setting (not Public), (b) Network Discovery and File/Print Sharing are enabled, and Use user accounts and passwords is enabled.

2. Make sure the Windows 7 or third party firewall enables the SAN.

3. Map a folder to the SAN as follows:   NET USE Z: \\IP_address_of_SAN\Folder and authenticate. What error do you get?

.... Thinkpads_User
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dakota5Author Commented:
Thank you both for your input.  There was a change to our very large network that required the addition of a new DNS and WINS Server in the network setup for Windows 7 and Server 2008 R2.

I can't explain why XP boxes work just fine without these new settings, but it must somehow relate to SMB1 vs SMB2.

SMB signing was turned on for both the XP and Windows7 boxes, and all the other settings in local security relating to networking were the same.  Interesting that Windows7 requires the WINS Server in the network setup and the XP box does not.
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JohnBusiness Consultant (Owner)Commented:
@dakota5 - Thank you for the update and I was happy to help you.

.... Thinkpads_User
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gurutcCommented:
Ditto what Thinkpads_User said.
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