Two 256gb ssd or one 512?

Hardware HDD's & SSD's
1

I want to dual boot both linux and windows on ssd's. Should I have two 256gb ssd's or one 512gb with two partitions?

2

You could do it either way. Two SSD's could be better for raid.

3

for dual boot, in my opinnion it would be better / safer to grab 2x256GB ssd's. in my opinnion. cause linux works with a diffrent file system.

Also if one of the ssd's fails, for some reason, or one of the OS gets corrupted, you are not screwed by then.

4

I would have to agree with Angel on this one for this specific use-case. RAIDing SSDs is a terrible idea for reliability as most SSD NAND controllers cannot perform garbage collection properly in RAID. There are only a handful of SSDs that I know of that were specifically designed for use in RAID and don't suffer from this problem. The ASUS RAIDR being one of those.