A script for checking disks on the server is given at: http://social.microsoft.com/Forums/en-US/whsfaq/thread/b5372407-1f24-4eff-9092-069c4b4f0cee
The code refers to
chkdsk D: /x /r
chkdsk C: /x /r
That looks like it's checking for C: and D: partitions -- what part of the script tells chkdsk to check all other disks? Just curious, thanks.