What does DrivePool do on a duplicated file read error?

I've read Drashna's post here: http://community.covecube.com/index.php?/topic/2596-drivepool-and-refs/#entry17810

However I have a few questions about ReFS support, and DrivePool behavior in general:

1) If Integrity Streams are enabled on a DrivePooled ReFS partition and corruption occurs, doesn't the kernel emit an error when checksums don't match?

2) As I understand it, DrivePool automatically chooses the least busy disk to support read striping. Suppose an error occurs reading a file. Regardless of the underlying filesystem, would DrivePool automatically switch to another disk to attempt to read the same file?

3) Does DrivePool attempt to rewrite a good copy of a file that is corrupt?

Thanks!