hardware monitoring and notification

[pzero]

Hi all,
I've a few Dell PowerEdge 1655MC (Blade servers) running Red Hat 
Enterprise Linux 3 ES.

Last week one of the servers crashed: one of the two hard drives failed, 
they are running in mirroring mode (RAID 1).

I've figured out the failed HD problem by reading the SCSI errors in the 
file /var/log/messages.

Is there any good way to get notified by email about the hardware 
problems for a Dell server?

Is there any centralized way (e.g. Dell IT Assistant) to monitor 
hardware status for a few servers and get notifications when a problem 
arise?

Thanks!