The other day for reasons one cannot recall I looked into dynamic disks again on windows xp.
I found out something one must share with you since it quite startled me.
Most people use basic disks when using windows. basic disks use partitions, a hardisk can have: 4 primary partitions or 3 primary and one extended partition
A extended partition is just a container for logical partitions, you can have as many logical partitions as you have drive letters left ie A to Z.
However only primary partitions can be used to boot from. Also only one primary partition (on each disk) can be the active partition (the boot disk) at any time.
Well dynamic dump all that weirdness, and use volumes instead, the interesting thing is dynamic disks can be mirrored, spanned, striped, and use raid 5.
Personally I rather eat a cows udder cooked garlic butter than use windows for R.A.I.D. when inexpensive hardware solutions are available, and spanned volumes are just lunacy(unless you have everything backed up).
Saying that though a windows based mirror would probably be OK, but but expect performance issues.
What really put me off though was the fact if you convert a basic disk containing multiple operating systems, “the partition entries for all partitions on the disk are removed, except for the system and boot volumes of the currently running operating system”
Which would be bad very very bad.