Very timely article as I was about to embark on a journey to write a vb script to use wmi calls to check for disk space, etc.

This seems much easier - Thanks!

How do you setup an alert for low disk space , if you are use a raid 10?

It's not working with physical disks - it is working with your logical drives such as C:, D:, etc.  So what is doing the physical storage (eg, single IDE disk, SCSI disk, RAID 0, 1, 5, 10 etc) doesn't really matter.  I imagine you could even have it check it on a USB drive!

So if you have drives C & D on your RAID 10, as far as your apps (including SQL Server) are concerned, it doesn't matter that C & D are sharing the one set of disks.  SQL will care if it has a database on D and D has only 10MB left though!

Hope that helps explain... 

Great article.  However, it would have been helpful if you would have provided the counter used for Low Memory.  I believe that you are referencing Memory: Available MBytes. 

Thanks