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Changes between Initial Version and Version 1 of Ticket #24925, comment 1

initial	v1
1		It's a great idea from a user experience standpoint, but complicated by the fact PHP's filesystem & FTP functions don't give any kind of useful error status. The filesystem code could do a set of triage checks after failures, but that would only identify reasons that might ~~prevent~~ an upgrade from completing.
	1	It's a great idea from a user experience standpoint, but complicated by the fact PHP's filesystem & FTP functions don't give any kind of useful error status. The filesystem code could do a set of triage checks after failures, but that would only identify reasons that might have prevented an upgrade from completing.
2	2
3	3	I'm working on a plugin called [https://github.com/daveross/upgrade-first-aid upgrade-first-aid] that does those kinds of checks outside of the plugin upgrader itself. It might be a good idea to add a disk space check ([http://php.net/manual/en/function.disk-free-space.php disk_free_space()]) to that plugin's code.