Re: raid10 redundancy

Phillip Susi [off-list ref]

No, it only depends on the number of copies.  They layout just effects
the performance.

I thought someone test the performance of two ssd, raid-1 outperforms
all the layout. so maybe under ssd it's not important?

No; 2 copies means you can lose one disk and still have the other copy.
Where those copies are stored doesn't matter for redundancy, only performance.

 I am trying to figure out how to lose two disks without losing two
copies. in history there are time bombs in ssd (like hp ssd made by
samsung) caused by buggy firmware.
if I put the orders correct, it will be safe even the same twin ssd
died together.