Comment 2 for bug 287751

I'm using dmraid version 1.0.0.rc14-2ubuntu11, the only version which is available for me in the package management.
Today in the morning it seemed to work for a moment: I found my Volume0 in /dev/mapper, but not the partitions (Volume01,02,05). Sadly, after a reboot I'm back to: "ERROR: device-mapper target type "raid4-5" not in kernel"

Maybe my dmesg output gives you a hint:
[ 1295.729404] device-mapper: dm-raid45: initialized v0.2427
[ 1295.729503] device-mapper: table: 254:1: raid4-5: unknown target type
[ 1295.729506] device-mapper: ioctl: error adding target to table
[ 1295.732803] attempt to access beyond end of device
[ 1295.732810] sdb: rw=0, want=932733760, limit=488397168
[ 1295.732811] __ratelimit: 3 callbacks suppressed
[ 1295.732813] Buffer I/O error on device sdb2, logical block 827877504
[ 1295.732816] attempt to access beyond end of device
[ 1295.732818] sdb: rw=0, want=932733761, limit=488397168
[ 1295.732819] Buffer I/O error on device sdb2, logical block 827877505
[ 1295.732821] attempt to access beyond end of device
[ 1295.732823] sdb: rw=0, want=932733762, limit=488397168
[...]
[ 1295.732847] sdb: rw=0, want=932733767, limit=488397168
[ 1295.732849] Buffer I/O error on device sdb2, logical block 827877511
[ 1295.732852] attempt to access beyond end of device
[ 1295.732853] sdb: rw=0, want=932733760, limit=488397168
[ 1295.732855] Buffer I/O error on device sdb2, logical block 827877504
[ 1295.732857] attempt to access beyond end of device
[ 1295.732858] sdb: rw=0, want=932733761, limit=488397168
[ 1295.732860] Buffer I/O error on device sdb2, logical block 827877505
[ 1295.732862] attempt to access beyond end of device
[ 1295.732863] sdb: rw=0, want=932733762, limit=488397168
[ 1295.732865] attempt to access beyond end of device
[ 1295.732866] sdb: rw=0, want=932733763, limit=488397168
[ 1295.732868] attempt to access beyond end of device
[ 1295.732869] sdb: rw=0, want=932733764, limit=488397168
[ 1295.732871] attempt to access beyond end of device
[... about 70 times the same line]
[ 1295.733216] sdb: rw=0, want=932733899, limit=488397168
[ 1295.733218] attempt to access beyond end of device
[ 1295.733219] sdb: rw=0, want=932733900, limit=488397168
[ 1316.477536] device-mapper: table: 254:0: raid4-5: unknown target type
[ 1316.477542] device-mapper: ioctl: error adding target to table