Hot answers tagged site-collection
you can do it couple of ways. Backup and restore Site collection Backup the site collection in question ( backup-spsite) move the backup to test farm restore the site using restore-spsite. Move site into own content DB create a new content db use move-spsite to move the site collection into the new content db now use Database baackup or restore ...
Typically when these types of errors occur, it is best to abandon the Content Database. Create a new Content Database on the Web Application, then use Move-SPSite to migrate each Site Collection to the new database. Once you've migrated to the new Content Database, perform an iisreset, then detach the old Content Database.
please check your IIS Server Security token service .If it is stopped click start option or try to restart the service. I have faced same issue long back and this option worked me. if it is not working for your scenario let me know.
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