No one deserves 1 star so I gave 2. Why?
* windows 2003 is obsolete - in my opinion you should document the steps for 2008+
* you format the partition with the defaults. In windows 2003 you should use diskpart to align the partition to a 64K boundary for performance reasons. Win2008 does it automatically
* also if you format the disk for sql you should use 64K block size, again for better performance
* since you're using win 2003 you should talk about the fact that if you later want to modify the clustered resource you need to bring SQL offline. Not so with win 2008 where you can add/remove disks on the fly (assuming you're not messing around with disks that still have active db files on them)
* it may be interesting to also discuss the permissions for SQL if you have an instance installed and need to add a second disk. Since SQL is already installed the permissions will not be set automatically and you need to set ntfs permissions manually or you'll get access denied when creating a db on that new disk
Hope that clarifies my rating of 2 and hope it helps in writing future articles. Don't let the rating bring you down. Keep it up and maybe one day we'll be buying your book in a store 🙂