Sharepoint 2010 Powershell Backup Scripts Backup a Sharepoint 2010 Farm: List all items included the Sharepoint 2010 Farm backup: Backup a Sharepoint 2010 Site Collection:
STSADM -o backup -directory: Error Cannot open backup device Operating system error 5 (error not found) Ensure the SQL service account is a domain account and it has permissions to the Shared folder. Also ensure the account used to execute the backup command has the correct rights on the DB’s as per MS recommendations ie. … Continue reading STSADM -o backup -directory: Error Cannot open backup device Operating system error 5 (error not found)
The problem is probably that the GUID of the new site youre trying to restore is the same as an existing site in the content database. Either delete the existing site or I would imagine you could restore to a diffrent content database although I havnt verified this.