/var/lib/ureadahead/pack file never created

I noticed that the pack file was never created.

Looking at the /etc/init/ureadahead.conf, it appears that the 'mountall' event triggers ureadahead.

However, according to the /etc/init/* files, this event is possibly never fired.

/var/log/upstart file directory doesn't show any log file with 'ureadahead.log' name but shows only a 'ureadahead-other.log' file with the below error messages :
---
ureadahead:/var/lib/ureadahead/var.pack: No such file or directory
ureadahead:/var/lib/ureadahead/usr.pack: No such file or directory
ureadahead:/var/lib/ureadahead/var.pack: No such file or directory
ureadahead:/var/lib/ureadahead/home.pack: No such file or directory
ureadahead:/var/lib/ureadahead/var.pack: No such file or directory
ureadahead:/var/lib/ureadahead/var.pack: No such file or directory
ureadahead:/var/lib/ureadahead/home.pack: No such file or directory
ureadahead:/var/lib/ureadahead/data.pack: No such file or directory
ureadahead:/var/lib/ureadahead/usr.pack: No such file or directory
---

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: ureadahead 0.100.0-12
ProcVersionSignature: Ubuntu 3.2.0-49.75-generic 3.2.46
Uname: Linux 3.2.0-49-generic x86_64
ApportVersion: 2.0.1-0ubuntu17.3
Architecture: amd64
Date: Fri Jul 26 22:10:37 2013
MarkForUpload: True
SourcePackage: ureadahead
UpgradeStatus: No upgrade log present (probably fresh install)