Without any tools, you can use errnotify class in odm, with a method sending a mail.
Try odmget errnotify to see the already defined objects.
Then odmadd to add a new method, like :
errnotify:
en_pid = 0
en_name = "myreport"
en_persistenceflg = 1
en_label = ""
en_crcid = 0
en_class = "H"
en_type = "PERM"
en_alertflg = ""
en_resource = ""
en_rtype = ""
en_rclass = ""
en_symptom = ""
en_err64 = ""
en_dup = ""
en_method = "/usr/lpp/diagnostics/bin/myscript $6 $9"
In that case your system will run the script "myscript" each time an "PERM" error on Hardware will be logged in your errorlog.
Use myscript to send a mail to system administrator.
Another thing : for monitoring FS space, network interface,.. you could use Netsaint (
a very efficient supervision tool running on AIX, Linux,...(freeware).