A while back we indicated that we had started to disable the SMB2 protocol at accounting firm sites due to file corruption issues.
- MPECS Inc. Blog: CaseWare Working Papers 2010 – Network File Locations Errors
- MPECS Inc. Blog: CaseWare Working Papers – Disabling SMB2
CaseWare’s KB on the subject has been updated:
- CaseWare Support: File corruption when using Windows Vista/Windows 7 or Windows Server 2008 with SMB2
We recommend that clients working in this environment install the hotfix (documented here: http://support.microsoft.com/kb/2028965), to limit their exposure to file corruption.
If you require assistance implementing the hotfix, please contact our support department for assistance.
Microsoft has acknowledged that data corruption can occur when multiple users perform read and write operations to a shared file in the SMB2 environment. Microsoft has issued a hotfix (mentioned above) which we have tested on Windows 7 workstations and confirmed that the potential for corruption no longer occurs. As long as the hotfix has been applied to all Windows 7 workstations running Working Papers, and there are no Vista workstations accessing Working Papers engagements, SMB2 can be enabled.
Windows Vista, Windows Server 2008/Windows Server 2008 R2-based Terminal/Citrix Servers running CaseWare® Working Papers
The hotfix outlined above has reduced the potential for file corruption for Windows Vista and Windows Server 2008/Windows Server 2008 R2-based Terminal/Citrix servers running CaseWare Working Papers environments. However, we have still noticed crashes of our application even with the hotfix applied.
Microsoft has acknowledged that SMB2 may cause problems with applications that require our level of performance/access to data files and have recently provided a number of possible recommendations. We are in the process of testing these recommendations to confirm whether they address the Working Papers corruption issues in these additional environments.
We expect to provide an update for Windows Vista and Windows Server 2008/Windows Server 2008 R2-based Terminal/Citrix Servers running CaseWare Working Papers environments in early January. Until that time, we still recommend disabling SMB2 for these environments to avoid any potential data corruption.
Note the exception for the server OSs as well as Windows Vista.
This looks to be a client based hotfix at this time, so we will start updating the problematic Windows 7 machines and wait to see what CaseWare has to say in January.
Here is a direct link to the Request Page:
A link has been placed in our Hotfix Quick Links in the left hand column of the blog for later access.
Microsoft Small Business Specialists
Co-Author: SBS 2008 Blueprint Book