While investigating T4085 I noticed the following error in the daemon logs going on for several days. I don't think any of the usual functionality we use (Maniphest, Differential, Diffusion) are malfunctioning. What could it be?
```
[2013-11-11 15:16:38] EXCEPTION: (FilesystemException) Requested path `/' is not writable. at [/home/ubuntu/phabricator/libphutil/src/filesystem/Filesystem.php:989]
#0 phlog(Object FilesystemException) called at [/home/ubuntu/phabricator/phabricator/src/applications/repository/daemon/PhabricatorRepositoryPullLocalDaemon.php:153]
#1 PhabricatorRepositoryPullLocalDaemon::run() called at [/home/ubuntu/phabricator/libphutil/src/daemon/PhutilDaemon.php:81]
#2 PhutilDaemon::execute() called at [/home/ubuntu/phabricator/libphutil/scripts/daemon/exec/exec_daemon.php:112]
```