The following commands are executed in Ubuntu 14.04.4 + 4.4.0-34-generic 1. dmraid -d -r
DEBUG: not isw at 17091787776 DEBUG: isw trying hard coded -2115 offset. DEBUG: not isw at 17090705920 DEBUG: not isw at 982805117952 DEBUG: isw trying hard coded -2115 offset. DEBUG: not isw at 982804036096 DEBUG: not isw at 2000365288448 DEBUG: isw trying hard coded -2115 offset. DEBUG: not isw at 2000364206592 DEBUG: not isw at 1000204884992 DEBUG: isw trying hard coded -2115 offset. DEBUG: not isw at 1000203803136 no raid disks 2. dmraid -V dmraid version: 1.0.0.rc16 (2009.09.16) shared dmraid library version: 1.0.0.rc16 (2009.09.16) device-mapper version: unknown Option verbose only return "no raid disks" I've also take a look into the system log. Seems the device-mapper versions of the two kernels are different? Ubuntu 14.04.4 + 3.16.0-77-generic Aug 10 20:10:55 bblabcloud kernel: [ 0.625995] device-mapper: uevent: version 1.0.3 Aug 10 20:10:55 bblabcloud kernel: [ 0.626037] device-mapper: ioctl: 4.34.0-ioctl (2015-10-28) initialised: dm-de...@redhat.com ..... Aug 10 11:26:09 bblabcloud kernel: [ 26.001170] device-mapper: multipath: version 1.7.0 loaded Ubuntu 14.04.4 + 4.4.0-34-generic Aug 10 20:10:55 bblabcloud kernel: [ 0.625995] device-mapper: uevent: version 1.0.3 Aug 10 20:10:55 bblabcloud kernel: [ 0.626037] device-mapper: ioctl: 4.34.0-ioctl (2015-10-28) initialised: dm-de...@redhat.com ...... Aug 10 20:10:55 bblabcloud kernel: [ 9.720613] device-mapper: multipath: version 1.10.0 loaded -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1611277 Title: Kernel Shipped With Ubuntu 16.04.1 Cannot Recognize fakeRaid To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1611277/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs