Netlogon got the following error while trying to get the subnet to site mapping information from the DS: A device attached to the system is not functioning.

What is the error for the netlogon, is it related to a journal error? D2/d4 bug track is the fix. The error should include how to fix it.  Make sure you see which is authoritative.  Disable ntfrs replication when running the repair.  Also make sure to backup the c:\windows\system32\sysvol files.
Net share will show you where sysvol is and you can look within to see if you have a prestage/preexisting from which you could copy the files out if those are the correct ones

Make sure there is a sysvol and a sysvol\netlogon folder.  If the netlogon is missing, it can not be shared .....

This issue comes up if the replication once fixed triggered based on the wrong source as the master, I.e. 2003 had outdated empty data and it was seen as the reference server when replication resume clearing the contents of the win2k8.

There is no share folder SYSVOL and NETLOGON found on windows 2008 domain controller. where as some other errors occurred in event log related to active directory replication.

1. The DFS Namespace service could not initialize the trusted domain information on this domain controller, but it will periodically retry the operation. Event ID 14548 "
2.  Active Directory Domain Services was unable to establish a connection with the global catalog. event id 1126
3. The processing of Group Policy failed. Windows could not determine if the user and computer accounts are in the same forest. Ensure the user domain name matches the name of a trusted domain that resides in the same forest as the computer account. event id 1110

besides the above errors main issue is how can we start netlogon service at this stage.

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