mdadm's Raid 10 driver
nick at leippe.com
Wed Apr 3 07:59:30 MDT 2013
See this page:
for decent visuals on the different md raid10 layouts that linux/mdadm
supports. (raid 10 and raid 1e sections)
Doing raid 1 on top of raid 0 devices is called raid 0+1, and is not the
same as doing raid 0 on top of raid 1 devices: raid 1+0 aka raid 10.
The latter can withstand a much larger combination of failed components
whereas the former can only withstand failures when they all occur within
the same half of the single mirror.
More information about the PLUG