dbus/hal is not stable!

Recently I am writing some dbus/libhal programs to display mac address and some hard drive info. Programs run randomly away with this error:

libhal_ctx_init: org.freedesktop.DBus.Error.Disconnected: Connection was disconnected before a reply was received

It is totally unacceptable in this project. I need a stable solution. Just list some references here and write code to prove.

Hard Disk Metadata
The Linux /proc Filesystem as a Programmers' Tool