I've read that "It is not recommended that RAID types be mixed in a pool", which implies that it is possible. Why is it not recommended?
It would be very desirable in my setup, which consists of a mix of very-important, important and not important files, to dynamically assign different RAID-Z levels for different file systems inside ONE pool.
The second question is: what would happen, if disks begin failing? I understand, that I wouldn't be able to access not sufficiently raided file systems. But what if the raided ones (with sufficient redundancy to handle the failure) are nested inside file system that failed? Would they by available? How?
I'm planning to use ZOL, version 0.6.0.80, which compatible with zpool version 28 and zfs version 5.