Segfault on rebuild

[Brian Spisak]

Hi,
I have a 4 disk RAID5 array with a failed disk. I removed the bad disk and inserted a new disk. However, when I try to rebuild with the new disk, dmraid crashes. (See details below.)

I read elsewhere that ntfs may cause problems? I have two ntfs partitions. Can this be part of the problem? I need to rebuild my array before I loose another disk! (Of course, I'm backed up.... but still..... :-)

Thanks for any help!

# dmraid -f isw -R isw_chifcdfhf /dev/sdc
ERROR: isw: wrong number of devices in RAID set "isw_chifcdfhf_RAID5" [3/4] on /dev/sdd
ERROR: isw: wrong number of devices in RAID set "isw_chifcdfhf_RAID5" [3/4] on /dev/sde
ERROR: isw: wrong number of devices in RAID set "isw_chifcdfhf_RAID5" [3/4] on /dev/sdf
Segmentation fault (core dumped)

# dmraid -r
*** Group superset isw_chifcdfhf
--> *Inconsistent* Active Subset
name : isw_chifcdfhf_RAID5
size : 3907041280
stride : 256
type : raid5_la
status : inconsistent
subsets: 0
devs : 3
spares : 0

# dmraid -s
/dev/sdf: isw, "isw_chifcdfhf", GROUP, ok, 1953525166 sectors, data@ 0
/dev/sde: isw, "isw_chifcdfhf", GROUP, ok, 1953525166 sectors, data@ 0
/dev/sdd: isw, "isw_chifcdfhf", GROUP, ok, 1953525166 sectors, data@ 0

# # df -T | grep mapper
/dev/mapper/isw_chifcdfhf_RAID5p5 fuseblk 2804317180 884804828 1919512352 32% /mnt/data
/dev/mapper/isw_chifcdfhf_RAID5p2 fuseblk 10485752 4082644 6403108 39% /mnt/share
/dev/mapper/isw_chifcdfhf_RAID5p3 ext4 10321208 3007356 6789564 31% /var
/dev/mapper/isw_chifcdfhf_RAID5p4 ext4 103212320 75764656 22204784 78% /home

# lsb_release -rd
Description: Ubuntu 12.04.2 LTS
Release: 12.04

# apt-cache policy dmraid
dmraid:
  Installed: 1.0.0.rc16-4.1ubuntu8
  Candidate: 1.0.0.rc16-4.1ubuntu8

[Cedric Kimaru (la6nchpad)]

seeing this as well on 12.04

root@amilet:/home/myubuntu# dmraid -R isw_bffghfhhej_RAID5_3Disks /dev/sdc
ERROR: isw: wrong number of devices in RAID set "isw_bffghfhhej_RAID5_3Disks" [2/3] on /dev/sdd
ERROR: isw: wrong number of devices in RAID set "isw_bffghfhhej_RAID5_3Disks" [2/3] on /dev/sdb
Segmentation fault (core dumped)

root@amilet:/home/myubuntu# dmesg
[ 692.512042] show_signal_msg: 48 callbacks suppressed
[ 692.512047] dmraid[3909]: segfault at 0 ip b775ecc9 sp bfdfe720 error 4 in libdmraid.so.1.0.0.rc16[b7747000+35000]

root@amilet:/home/myubuntu# lsb_release -rd
Description: Ubuntu 12.04.3 LTS
Release: 12.04

However, adding debug and verbose doesn't result in the core but raid still doesn't rebuild ;(

root@amilet:/home/myubuntu# dmraid -d -v -R isw_bffghfhhej_RAID5_3Disks /dev/sdc
DEBUG: not isw at 721419264
DEBUG: isw trying hard coded -2115 offset.
DEBUG: not isw at 720337408
DEBUG: not isw at -1024
DEBUG: isw trying hard coded -2115 offset.
DEBUG: not isw at -1082880
DEBUG: not isw at -1024
DEBUG: isw trying hard coded -2115 offset.
DEBUG: not isw at -1082880
DEBUG: not isw at -2105541632
DEBUG: isw trying hard coded -2115 offset.
DEBUG: not isw at -2106623488
DEBUG: not isw at -1055826944
DEBUG: isw trying hard coded -2115 offset.
DEBUG: not isw at -1056908800
DEBUG: not isw at -1055826944
DEBUG: isw trying hard coded -2115 offset.
DEBUG: not isw at -1056908800
DEBUG: not isw at -1055826944
DEBUG: isw trying hard coded -2115 offset.
DEBUG: not isw at -1056908800
DEBUG: not isw at -1055826944
DEBUG: isw trying hard coded -2115 offset.
DEBUG: not isw at -1056908800
DEBUG: not isw at -1055826944
DEBUG: isw trying hard coded -2115 offset.
DEBUG: not isw at -1056908800
DEBUG: not isw at -1055826944
DEBUG: isw trying hard coded -2115 offset.
DEBUG: not isw at -1056908800
DEBUG: not isw at -522494976
DEBUG: isw trying hard coded -2115 offset.
DEBUG: not isw at -523576832
DEBUG: not isw at -522494976
DEBUG: isw trying hard coded -2115 offset.
DEBUG: not isw at -523576832
DEBUG: not isw at -1055826944
DEBUG: isw trying hard coded -2115 offset.
DEBUG: not isw at -1056908800
DEBUG: isw metadata found at -522494976 from probe at 232

DEBUG: not isw at -522494976
DEBUG: isw trying hard coded -2115 offset.
DEBUG: not isw at -523576832
DEBUG: isw metadata found at -522494976 from probe at 232

DEBUG: not isw at 1891654656
DEBUG: isw trying hard coded -2115 offset.
DEBUG: not isw at 1890572800
DEBUG: _find_set: searching /dev/sdc
DEBUG: _find_set: not found /dev/sdc
DEBUG: _find_set: searching isw_bffghfhhej
DEBUG: _find_set: not found isw_bffghfhhej
DEBUG: _find_set: searching isw_bffghfhhej_RAID5_3Disks
DEBUG: _find_set: searching isw_bffghfhhej_RAID5_3Disks
DEBUG: _find_set: not found isw_bffghfhhej_RAID5_3Disks
DEBUG: _find_set: not found isw_bffghfhhej_RAID5_3Disks
DEBUG: freeing devices of RAID set "isw_bffghfhhej_RAID5_3Disks"
DEBUG: freeing device "isw_bffghfhhej_RAID5_3Disks", path "/dev/sdd"
DEBUG: freeing devices of RAID set "isw_bffghfhhej"
DEBUG: freeing device "isw_bffghfhhej", path "/dev/sdd"
DEBUG: _find_set: searching isw_bffghfhhej
DEBUG: _...

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.