When trying to use the insert image functionality in Magento if you receive an error saying:
“The directory is not writable by server.”
Simply add a folder called wysiwyg in your root media folder and change the CHMOD to 777.
For some reason Magento doesn’t always automatically add the upload folder.
Hope this helps someone.
在Media文件夹新建文件夹“wysiwyg”；
然后授权，代码如下：
chmod -R 777 wysiwyg
https://www.ivince.uk/magento-error-the-directory-is-not-writable-by-server/
Magento Error – The directory is not writable by server.
原文：http://www.cnblogs.com/sunsoftware/p/4354744.html