How to split Raid 10 (raid 0+1) into two Raid 0?

Question

RAID

In general, there is a Supermicro server, it has Raid 10 (0 + 1) on four identical disks, i.e. data is smeared across two disks and then mirrored onto two more smeared disks (like so), and Windows Server 2012R2 is installed on this raid. As a result, the system is loaded from this Raid 10 and in fact there is only one disk in the system. There was a task to add 2 SSD disks (in the mirror) or 1 SSD disk, but there is no physical space in the server. I thought, I’ll disassemble Raid 10 into two Raid 0, then I’ll remove one Raid 0 and insert two SSDs into the free space. The question is, how can I pull out one Raid 0 from Raid 10 (removing mirroring) without losing data?

Answer 1

Take a disk image to some external media, disassemble the Raid, configure the raid as you like, roll the image with partition compression (if necessary).
I would leave raid1, not raid0.
In any case - a disk image to external media before any manipulations!