"Bryan J. Smith" <b.j.smith at ieee.org> wrote: > ??? I thought XP Pro can use LDM and striping/mirroring, just > like Windows 2000 Pro ??? Just FYI, you have to use a Logical Disk Manager (LDM) Disk Label** (aka "Dynamic Disk") to use the software RAID features of Windows 2000 Pro and XP Pro (not sure about XP Home, what it offers). This is a safety feature, as legacy BIOS/DOS Disk Labels (aka "Basic Disk" -- i.e., old Primary/Extended/Logical disk slices) can store inter-Disk Slice** dependencies/ associations. LDM Disk Labels show up as a Disk Slice of type 42h in a legacy BIOS/DOS Disk Label. It's the same reason why you should use a Logical Volume Management (LVM) Disk Slice when you use Linux's Software RAID, even when using the Multi Disk (MD) for your RAID. It will store Disk Slice associations, unlike a legacy BIOS/DOS Disk Label. -- Bryan **NOTE: I'm purposely using established UNIX terminology, instead of PC: Disk Slice ~ Partition Disk Label ~ Partition Table Disk Labels can be encapsulated inside of Disk Slices. E.g., the "Extended" primary partition is really a new Disk Label (with "Logical" partitions) inside of a Disk Slice. Same deal with BSD Disk Labels, NT5+ (2000+) LDM Disk Labels, Linux LVM Disk Labels, etc... The legacy BIOS/DOS Disk Label has 0 storage other than the Disk Slices themselves (other than MBR and the partition table itself -- no meta-data, no journal, no geometry, etc...). -- Bryan J. Smith mailto:b.j.smith at ieee.org Sent from Yahoo Mail (please excuse any missing headers)