This function has been deprecated. That means it has been replaced by a new function or is no longer supported, and may be removed from future versions. All code that uses this function should be converted to use its replacement if one exists. See also wp-includes/deprecated.php.
Use
wp_dashboard_quota instead.
This function was renamed wp_dashboard_quota() and moved to a different file as of v3.1.
Change Log
Source File
dashboard_quota() was located in wp-admin/includes/ms.php.