I wanted 2 sites to be the exact same. So I was
performing a backup of a site collection http://sharepoint.fahad.com/sites/siteA
and was trying to restore it as http://sharepoint.fahad.com/sites/siteB
.
Backup-SPSite -Identity "http://sharepoint.fahad.com/sites/siteA"
-Path "C:\ Backups\siteA.bak” -force -verbose
Restore-SPSite -Identity "http://sharepoint.fahad.com/sites/siteB"
–Path "C:\ Backups\siteA.bak" -force -verbose
The restore operation failed and gave me the below error:
Restore-SPSite: The operation that you are attempting to
perform cannot be completed successfully. No content databases in the web
application were available to store your site collection. The existing
content databases may have reached the maximum number of site collections, or
be set to read-only, or be offline, or may already contain a copy of this site
collection. Create another content database for the Web application and
then try the operation again.
Reason
Both these site collections were in the same web
application and it had only one content database. Microsoft uses the source
site collection GUIDs during the installation. Though you delete the site
collection from the web application, it leaves the GUIDs behind, and if you try
to restore same site collection (same GUID) into same web application and
content database, it would throw an error.
To resolve the issue, new content database needs to be
created in the web application to restore the site collection.
Resolution
1.Create a new content database WSS_Content_siteB from Central Administration for your web
application where your site collection is going to reside. Reference
2.Restore-SPSite -Identity "http://sharepoint.fahad.com/sites/siteB"
-Path "C:\ Backups\siteA.bak" -force -verbose -ContentDatabase WSS_Content_siteB
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