Will Softraid RAID1 read from the fastest mirror/-s / supports user-specified device read priority order, nowadays? Takes broken disk out of use?

[Tinker]

Hi,

1)
http://www.openbsd.org/papers/asiabsdcon2010_softraid/softraid.pdf page 
3 "2.2 RAID 1" says that it reads "on a round-robin basis from all 
active chunks", i.e. read operations are spread evenly across disks.

Since then did anyone implement selective reading based on experienced 
read operation time, or a user-specified device read priority order?


That would allow Softraid RAID1 based on 1 SSD mirror + 1 SSD mirror + 1 
HDD mirror, which would give the best combination of IO performance and 
data security OpenBSD would offer today.

2)
Also if there's a read/write failure (or excessive time consumption for 
a single operation, say 15 seconds), will Softraid RAID1 learn to take 
the broken disk out of use?

Thanks,
Tinker