Data Recovery Weekly

It doesn't make sense to combine several mirrored virtual disks created in Storage Spaces to a RAID0 using Disk Management, Dynamic Disks, and LDM as described here , at least when dealing with not too many disks. Apparently, too many is more than eight disks. If you have eight disks or less, the Storage Spaces driver allocates data in such a way that you get a RAID10 consisting of four disk pairs maximum. It is pointless to impose one more RAID layout on top of this configuration; doing so you can even make the matter worse due to alignment issues. Talking about alignment, it should be noted that stripe on a Storage Spaces virtual disk is 256 KB in size and starts from the beginning of the virtual disk.

Can I swap the disks in RAID (connect the disks to different ports) and don't lose the RAID data? There are two types of RAID implementation: 1. Configuration-on-disks (COD) - in which the information about RAIDs along with the data about to what array exactly the current disk belongs to is stored on the disk itself. In this case you can transfer the disks between the ports and even between the controllers of the same model. Such a scheme is implemented in modern software RAIDs (Windows LDM and Linux mdadm) and in most hardware controllers as well. Sometimes you can even transfer the array between the different controller models, for example Intel ICH9R and Intel ICH10R. 2. RAID implementations in which the information about member disks is stored in the controller memory. Here, the controller actually monitors not the disks, but the ports and so you cannot swap the disks. Othewise, you lose the array and then you need a RAID recovery .