While working with SharePoint 2013 restore and backup I got
interesting error in one of my host named site collection (I hope this is
generic issue, not specific to host named site collection) saying as shown the image below.
When I try to fix this issue from SharePoint central
administration quotas, all the options are disabled and unable to change
anything as shown the image below.
By going through some of the blogs, I got the
issue. In SharePoint 2013, we are having Manintanence Mode property for SPSite
makes SharePoint site is undergoing a Maintenance & is read only. We
can set this SharePoint site when content DB is in read only state, or when
SharePoint site upgrade, moving SharePoint site in process.
We can fix this error by clearing ClearMaintenanceMode
method in SpSiteAdministration object.
We can do this by running following command,
$Site = new-object
Microsoft.SharePoint.Administration.SPSiteAdministration(SITE URL) $Site.ClearMaintenanceMode()
This fixed my issue. Hope this helps.