[dm-devel] Update to kernel 514.2 Breaks RAID0

[Adam Courville]

This is using CentOS 7.  A previously used striped RAID stalls the boot, 
because it is not found in /dev/mapper location.

When I tried  a forced creation of a device using dmsetup using this 
command:

# 'echo "0 $NumSectors striped 2 256 /dev/sdb 0 /dev/sdc 0" | dmsetup 
create ddf1_4TB'

I get the following:

"Failure to communicate with kernel device-mapper driver.
Incompatible libdevmapper 1.02.135-RHEL7 (2016-09-28) and kernel driver 
(unknown version).
Command failed"

Hence, I suspect something amiss with the new kernel 514.2 and/or 
device-mapper.

If I regress via grub bootloader to 3.10.0-327.36.3.el7.x86_64, the 
RAID0 works fine.

Any workaround assistance would be appreciated.

Thank you,

Adam Courville