Bug#844640: mdadm: Newly-created array doesn't assemble at boot - related to hostname change?

Andy Smith andy at strugglers.net
Thu Nov 17 18:23:08 UTC 2016


Package: mdadm
Version: 3.3.2-5+deb8u1
Severity: normal

Dear Maintainer,

   * What led up to the situation?

First off, I feel like I am missing something obvious and that this may
not be a bug. I did present this problem on linux-raid first, and it
seems to have stumped them. So, here goes…

I installed a server and created four md arrays (md{0,1,2,3}) using
partman from the installer. The devices involved there were all
partitions on /dev/sd{a,b}. At this time the server's hostname was
"tbd".

After install, the server's hostname was changed to "jfd".

An additional array (md5) was created using member devices /dev/sd{c,d}.
It was added to /etc/mdadm/mdadm.conf and update-initramfs -u was
called.

This array does not assemble during boot.

After boot, it does assemble by doing:

# mdadm --assemble /dev/md5

or:

# mdadm --incremental /dev/sdc
# mdadm --incremental /dev/sdd

The mdadm.conf looks correct and is identical to the mdadm.conf inside
the initramfs.

   * What exactly did you do (or not do) that was effective (or
     ineffective)?

After looking at --detail and --examine I spotted that my new array md5
had a hostname of "jfd" whereas all the others had "tbd", since that was
the hostname when they were created. I tried changing the HOMEHOST line
from <system> to <ignore> or completely removing it.

I also tried changing the hostname of md5 to "tbd" so it was like all
the others, by doing:

# mdadm --assemble --homehost="tbd" --update=homehost /dev/md5 /dev/sd{c,d}

Neil Brown on linux-raid suggested removing my "DEVICE /dev/sd*" line
from mdadm.conf in case it confused udev, which I did also try without
success. Previously it had been the default, "DEVICE partitions
containers".

   * What was the outcome of this action?

None of this seems to have made any difference. md5 does not assemble
during boot but can be assembled manually after boot.

   * What outcome did you expect instead?

For md5 to be assembled during boot like md{0,1,2,3} are.

All of the info below was added by reportbug and I will not remove
anything just in case it is useful. There is some extra info about a
/dev/md4 and its member devices /dev/sd{e,f} which can be ignored
though. Like md5 it does not assemble at boot, but I am choosing to
focus on md5 for now.

The package reportbug script fails to examine the initramfs because it
has a firmware blob prepended to it. I extracted the initramfs and it
doesn't have a conf/conf.d/md file. Here's the conf/mdadm file:

MD_HOMEHOST='jfd'
MD_DEVS=all

reportbug shows /proc/mdstat at boot time, before I have manually
assembled md5. Here is what it looks like afterwards:

$ sudo mdadm --assemble /dev/md5
mdadm: /dev/md5 has been started with 2 drives.
$ cat /proc/mdstat 
Personalities : [raid1] [raid10] 
md5 : active (auto-read-only) raid10 sdd[0] sdc[1]
      1875243008 blocks super 1.2 512K chunks 2 far-copies [2/2] [UU]
      bitmap: 0/14 pages [0KB], 65536KB chunk

md3 : active raid10 sda5[0] sdb5[1]
      12199936 blocks super 1.2 512K chunks 2 far-copies [2/2] [UU]
      
md2 : active (auto-read-only) raid10 sda3[0] sdb3[1]
      975872 blocks super 1.2 512K chunks 2 far-copies [2/2] [UU]
      
md1 : active raid10 sda2[0] sdb2[1]
      1951744 blocks super 1.2 512K chunks 2 far-copies [2/2] [UU]
      
md0 : active raid1 sda1[0] sdb1[1]
      498368 blocks super 1.2 [2/2] [UU]
      
unused devices: <none>

-- Package-specific info:
--- mdadm.conf
CREATE owner=root group=disk mode=0660 auto=yes
MAILADDR root
ARRAY /dev/md/0  metadata=1.2 UUID=400bac1d:e2c5d6ef:fea3b8c8:bcb70f8f
ARRAY /dev/md/1  metadata=1.2 UUID=e29c8b89:705f0116:d888f77e:2b6e32f5
ARRAY /dev/md/2  metadata=1.2 UUID=039b3427:4be5157a:6e2d53bd:fe898803
ARRAY /dev/md/3  metadata=1.2 UUID=30f745ce:7ed41b53:4df72181:7406ea1d
ARRAY /dev/md/5  metadata=1.2 UUID=957030cf:c09f023d:ceaebb27:e546f095

--- /etc/default/mdadm
INITRDSTART='all'
AUTOCHECK=true
START_DAEMON=true
DAEMON_OPTIONS="--syslog"
VERBOSE=true

--- /proc/mdstat:
Personalities : [raid1] [raid10] 
md3 : active raid10 sda5[0] sdb5[1]
      12199936 blocks super 1.2 512K chunks 2 far-copies [2/2] [UU]
      
md2 : active (auto-read-only) raid10 sda3[0] sdb3[1]
      975872 blocks super 1.2 512K chunks 2 far-copies [2/2] [UU]
      
md1 : active raid10 sda2[0] sdb2[1]
      1951744 blocks super 1.2 512K chunks 2 far-copies [2/2] [UU]
      
md0 : active raid1 sda1[0] sdb1[1]
      498368 blocks super 1.2 [2/2] [UU]
      
unused devices: <none>

--- /proc/partitions:
major minor  #blocks  name

   8       16   15638616 sdb
   8       17     498688 sdb1
   8       18    1952768 sdb2
   8       19     976896 sdb3
   8       20          1 sdb4
   8       21   12208128 sdb5
   8        0   15638616 sda
   8        1     498688 sda1
   8        2    1952768 sda2
   8        3     976896 sda3
   8        4          1 sda4
   8        5   12208128 sda5
   9        0     498368 md0
   9        1    1951744 md1
   9        2     975872 md2
   9        3   12199936 md3
   8       48 1875374424 sdd
   8       32 1875374424 sdc
   8       80 3907018584 sdf
   8       64 3907018584 sde
 253        0     143360 dm-0
 253        1    1949696 dm-1
 253        2     974848 dm-2

--- LVM physical volumes:
  PV         VG    Fmt  Attr PSize  PFree
  /dev/md3   domvg lvm2 a--  11.63g 8.71g
--- mount output
sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,relatime)
proc on /proc type proc (rw,nosuid,nodev,noexec,relatime)
udev on /dev type devtmpfs (rw,relatime,size=10240k,nr_inodes=232551,mode=755)
devpts on /dev/pts type devpts (rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000)
tmpfs on /run type tmpfs (rw,nosuid,relatime,size=373544k,mode=755)
/dev/md1 on / type ext4 (rw,relatime,errors=remount-ro,stripe=256,data=ordered)
securityfs on /sys/kernel/security type securityfs (rw,nosuid,nodev,noexec,relatime)
tmpfs on /dev/shm type tmpfs (rw,nosuid,nodev)
tmpfs on /run/lock type tmpfs (rw,nosuid,nodev,noexec,relatime,size=5120k)
tmpfs on /sys/fs/cgroup type tmpfs (ro,nosuid,nodev,noexec,mode=755)
cgroup on /sys/fs/cgroup/systemd type cgroup (rw,nosuid,nodev,noexec,relatime,xattr,release_agent=/lib/systemd/systemd-cgroups-agent,name=systemd)
pstore on /sys/fs/pstore type pstore (rw,nosuid,nodev,noexec,relatime)
cgroup on /sys/fs/cgroup/cpuset type cgroup (rw,nosuid,nodev,noexec,relatime,cpuset)
cgroup on /sys/fs/cgroup/cpu,cpuacct type cgroup (rw,nosuid,nodev,noexec,relatime,cpu,cpuacct)
cgroup on /sys/fs/cgroup/devices type cgroup (rw,nosuid,nodev,noexec,relatime,devices)
cgroup on /sys/fs/cgroup/freezer type cgroup (rw,nosuid,nodev,noexec,relatime,freezer)
cgroup on /sys/fs/cgroup/net_cls,net_prio type cgroup (rw,nosuid,nodev,noexec,relatime,net_cls,net_prio)
cgroup on /sys/fs/cgroup/blkio type cgroup (rw,nosuid,nodev,noexec,relatime,blkio)
cgroup on /sys/fs/cgroup/perf_event type cgroup (rw,nosuid,nodev,noexec,relatime,perf_event)
systemd-1 on /proc/sys/fs/binfmt_misc type autofs (rw,relatime,fd=23,pgrp=1,timeout=300,minproto=5,maxproto=5,direct)
debugfs on /sys/kernel/debug type debugfs (rw,relatime)
mqueue on /dev/mqueue type mqueue (rw,relatime)
fusectl on /sys/fs/fuse/connections type fusectl (rw,relatime)
/dev/md0 on /boot type ext4 (rw,noatime,sync,data=ordered)
/dev/mapper/domvg-dom0_doc on /usr/share/doc type ext4 (rw,noatime,stripe=1024,data=ordered)
/dev/mapper/domvg-dom0_home on /home type ext4 (rw,relatime,stripe=256,data=ordered)
/dev/mapper/domvg-dom0_var on /var type ext4 (rw,relatime,stripe=256,data=ordered)
rpc_pipefs on /run/rpc_pipefs type rpc_pipefs (rw,relatime)
xenfs on /proc/xen type xenfs (rw,relatime)

--- initrd.img-3.16.0-4-amd64:

gzip: /boot/initrd.img-3.16.0-4-amd64: not in gzip format
cpio: premature end of archive

--- initrd's /conf/conf.d/md:
no conf/md file.

--- /proc/modules:
raid_class 12788 1 mpt3sas, Live 0xffffffffa0289000
dm_mod 89405 9 - Live 0xffffffffa00de000
raid10 47465 3 - Live 0xffffffffa00d1000
raid1 34596 1 - Live 0xffffffffa0087000
md_mod 107672 6 raid10,raid1, Live 0xffffffffa00b5000
scsi_mod 191405 6 sg,mpt3sas,raid_class,scsi_transport_sas,sd_mod,libata, Live 0xffffffffa0000000

--- /var/log/syslog:

--- volume detail:
/dev/sda:
   MBR Magic : aa55
Partition[0] :       997376 sectors at         2048 (type fd)
Partition[1] :      3905536 sectors at       999424 (type fd)
Partition[2] :      1953792 sectors at      4904960 (type fd)
Partition[3] :     24416258 sectors at      6860798 (type 05)
--
/dev/sda1:
          Magic : a92b4efc
        Version : 1.2
    Feature Map : 0x0
     Array UUID : 400bac1d:e2c5d6ef:fea3b8c8:bcb70f8f
           Name : tbd:0
  Creation Time : Tue Nov 15 21:13:17 2016
     Raid Level : raid1
   Raid Devices : 2

 Avail Dev Size : 996832 (486.82 MiB 510.38 MB)
     Array Size : 498368 (486.77 MiB 510.33 MB)
  Used Dev Size : 996736 (486.77 MiB 510.33 MB)
    Data Offset : 544 sectors
   Super Offset : 8 sectors
   Unused Space : before=456 sectors, after=96 sectors
          State : clean
    Device UUID : ba94dc86:d584c133:0c70a17c:f67e62eb

    Update Time : Thu Nov 17 14:49:34 2016
  Bad Block Log : 512 entries available at offset 72 sectors
       Checksum : 1bbe9358 - correct
         Events : 69


   Device Role : Active device 0
   Array State : AA ('A' == active, '.' == missing, 'R' == replacing)
--
/dev/sda2:
          Magic : a92b4efc
        Version : 1.2
    Feature Map : 0x0
     Array UUID : e29c8b89:705f0116:d888f77e:2b6e32f5
           Name : tbd:1
  Creation Time : Tue Nov 15 21:13:48 2016
     Raid Level : raid10
   Raid Devices : 2

 Avail Dev Size : 3903488 (1906.32 MiB 1998.59 MB)
     Array Size : 1951744 (1906.32 MiB 1998.59 MB)
    Data Offset : 2048 sectors
   Super Offset : 8 sectors
   Unused Space : before=1960 sectors, after=0 sectors
          State : clean
    Device UUID : 9753d4db:8adb8bc1:59563518:fe15c6ee

    Update Time : Thu Nov 17 17:43:01 2016
  Bad Block Log : 512 entries available at offset 72 sectors
       Checksum : 4c3cd625 - correct
         Events : 97

         Layout : far=2
     Chunk Size : 512K

   Device Role : Active device 0
   Array State : AA ('A' == active, '.' == missing, 'R' == replacing)
--
/dev/sda3:
          Magic : a92b4efc
        Version : 1.2
    Feature Map : 0x0
     Array UUID : 039b3427:4be5157a:6e2d53bd:fe898803
           Name : tbd:2
  Creation Time : Tue Nov 15 21:14:09 2016
     Raid Level : raid10
   Raid Devices : 2

 Avail Dev Size : 1951744 (953.16 MiB 999.29 MB)
     Array Size : 975872 (953.16 MiB 999.29 MB)
    Data Offset : 2048 sectors
   Super Offset : 8 sectors
   Unused Space : before=1960 sectors, after=0 sectors
          State : clean
    Device UUID : 0c4efb8a:4a423224:9d794a72:eb3499f8

    Update Time : Tue Nov 15 21:16:21 2016
  Bad Block Log : 512 entries available at offset 72 sectors
       Checksum : 1023bcb5 - correct
         Events : 17

         Layout : far=2
     Chunk Size : 512K

   Device Role : Active device 0
   Array State : AA ('A' == active, '.' == missing, 'R' == replacing)
--
/dev/sda4:
   MBR Magic : aa55
Partition[0] :     24416256 sectors at            2 (type fd)
--
/dev/sda5:
          Magic : a92b4efc
        Version : 1.2
    Feature Map : 0x0
     Array UUID : 30f745ce:7ed41b53:4df72181:7406ea1d
           Name : tbd:3
  Creation Time : Tue Nov 15 21:14:27 2016
     Raid Level : raid10
   Raid Devices : 2

 Avail Dev Size : 24399872 (11.63 GiB 12.49 GB)
     Array Size : 12199936 (11.63 GiB 12.49 GB)
    Data Offset : 16384 sectors
   Super Offset : 8 sectors
   Unused Space : before=16296 sectors, after=0 sectors
          State : clean
    Device UUID : a2079b5c:a7defa7b:bee14c08:ac1093d2

    Update Time : Thu Nov 17 17:43:01 2016
  Bad Block Log : 512 entries available at offset 72 sectors
       Checksum : a7fa19a - correct
         Events : 89

         Layout : far=2
     Chunk Size : 512K

   Device Role : Active device 0
   Array State : AA ('A' == active, '.' == missing, 'R' == replacing)
--
/dev/sdb:
   MBR Magic : aa55
Partition[0] :       997376 sectors at         2048 (type fd)
Partition[1] :      3905536 sectors at       999424 (type fd)
Partition[2] :      1953792 sectors at      4904960 (type fd)
Partition[3] :     24416258 sectors at      6860798 (type 05)
--
/dev/sdb1:
          Magic : a92b4efc
        Version : 1.2
    Feature Map : 0x0
     Array UUID : 400bac1d:e2c5d6ef:fea3b8c8:bcb70f8f
           Name : tbd:0
  Creation Time : Tue Nov 15 21:13:17 2016
     Raid Level : raid1
   Raid Devices : 2

 Avail Dev Size : 996832 (486.82 MiB 510.38 MB)
     Array Size : 498368 (486.77 MiB 510.33 MB)
  Used Dev Size : 996736 (486.77 MiB 510.33 MB)
    Data Offset : 544 sectors
   Super Offset : 8 sectors
   Unused Space : before=456 sectors, after=96 sectors
          State : clean
    Device UUID : 5cdb3a17:9d95f53c:7962ba44:e9d39b33

    Update Time : Thu Nov 17 14:49:34 2016
  Bad Block Log : 512 entries available at offset 72 sectors
       Checksum : c5a33221 - correct
         Events : 69


   Device Role : Active device 1
   Array State : AA ('A' == active, '.' == missing, 'R' == replacing)
--
/dev/sdb2:
          Magic : a92b4efc
        Version : 1.2
    Feature Map : 0x0
     Array UUID : e29c8b89:705f0116:d888f77e:2b6e32f5
           Name : tbd:1
  Creation Time : Tue Nov 15 21:13:48 2016
     Raid Level : raid10
   Raid Devices : 2

 Avail Dev Size : 3903488 (1906.32 MiB 1998.59 MB)
     Array Size : 1951744 (1906.32 MiB 1998.59 MB)
    Data Offset : 2048 sectors
   Super Offset : 8 sectors
   Unused Space : before=1960 sectors, after=0 sectors
          State : clean
    Device UUID : a336050c:eaa1d5bc:8156640e:92605d7f

    Update Time : Thu Nov 17 17:43:01 2016
  Bad Block Log : 512 entries available at offset 72 sectors
       Checksum : fe7dca4c - correct
         Events : 97

         Layout : far=2
     Chunk Size : 512K

   Device Role : Active device 1
   Array State : AA ('A' == active, '.' == missing, 'R' == replacing)
--
/dev/sdb3:
          Magic : a92b4efc
        Version : 1.2
    Feature Map : 0x0
     Array UUID : 039b3427:4be5157a:6e2d53bd:fe898803
           Name : tbd:2
  Creation Time : Tue Nov 15 21:14:09 2016
     Raid Level : raid10
   Raid Devices : 2

 Avail Dev Size : 1951744 (953.16 MiB 999.29 MB)
     Array Size : 975872 (953.16 MiB 999.29 MB)
    Data Offset : 2048 sectors
   Super Offset : 8 sectors
   Unused Space : before=1960 sectors, after=0 sectors
          State : clean
    Device UUID : fd704e8f:a8bca844:ed1896fe:b8775af8

    Update Time : Tue Nov 15 21:16:21 2016
  Bad Block Log : 512 entries available at offset 72 sectors
       Checksum : c0fa3c22 - correct
         Events : 17

         Layout : far=2
     Chunk Size : 512K

   Device Role : Active device 1
   Array State : AA ('A' == active, '.' == missing, 'R' == replacing)
--
/dev/sdb4:
   MBR Magic : aa55
Partition[0] :     24416256 sectors at            2 (type fd)
--
/dev/sdb5:
          Magic : a92b4efc
        Version : 1.2
    Feature Map : 0x0
     Array UUID : 30f745ce:7ed41b53:4df72181:7406ea1d
           Name : tbd:3
  Creation Time : Tue Nov 15 21:14:27 2016
     Raid Level : raid10
   Raid Devices : 2

 Avail Dev Size : 24399872 (11.63 GiB 12.49 GB)
     Array Size : 12199936 (11.63 GiB 12.49 GB)
    Data Offset : 16384 sectors
   Super Offset : 8 sectors
   Unused Space : before=16296 sectors, after=0 sectors
          State : clean
    Device UUID : 27842764:8a1fb0f0:b3a6058f:172910f9

    Update Time : Thu Nov 17 17:43:01 2016
  Bad Block Log : 512 entries available at offset 72 sectors
       Checksum : 33f73c64 - correct
         Events : 89

         Layout : far=2
     Chunk Size : 512K

   Device Role : Active device 1
   Array State : AA ('A' == active, '.' == missing, 'R' == replacing)
--
/dev/sdc:
          Magic : a92b4efc
        Version : 1.2
    Feature Map : 0x1
     Array UUID : 957030cf:c09f023d:ceaebb27:e546f095
           Name : tbd:5
  Creation Time : Thu Nov 17 02:35:15 2016
     Raid Level : raid10
   Raid Devices : 2

 Avail Dev Size : 3750486704 (1788.37 GiB 1920.25 GB)
     Array Size : 1875243008 (1788.37 GiB 1920.25 GB)
  Used Dev Size : 3750486016 (1788.37 GiB 1920.25 GB)
    Data Offset : 262144 sectors
   Super Offset : 8 sectors
   Unused Space : before=262056 sectors, after=688 sectors
          State : clean
    Device UUID : 4ac82c29:2d109465:7fff9b22:8c411c1e

Internal Bitmap : 8 sectors from superblock
    Update Time : Thu Nov 17 02:35:15 2016
  Bad Block Log : 512 entries available at offset 72 sectors
       Checksum : ec66c992 - correct
         Events : 0

         Layout : far=2
     Chunk Size : 512K

   Device Role : Active device 1
   Array State : AA ('A' == active, '.' == missing, 'R' == replacing)
--
/dev/sdd:
          Magic : a92b4efc
        Version : 1.2
    Feature Map : 0x1
     Array UUID : 957030cf:c09f023d:ceaebb27:e546f095
           Name : tbd:5
  Creation Time : Thu Nov 17 02:35:15 2016
     Raid Level : raid10
   Raid Devices : 2

 Avail Dev Size : 3750486704 (1788.37 GiB 1920.25 GB)
     Array Size : 1875243008 (1788.37 GiB 1920.25 GB)
  Used Dev Size : 3750486016 (1788.37 GiB 1920.25 GB)
    Data Offset : 262144 sectors
   Super Offset : 8 sectors
   Unused Space : before=262056 sectors, after=688 sectors
          State : clean
    Device UUID : 3a067652:6e88afae:82722342:0036bae0

Internal Bitmap : 8 sectors from superblock
    Update Time : Thu Nov 17 02:35:15 2016
  Bad Block Log : 512 entries available at offset 72 sectors
       Checksum : 40f0e73b - correct
         Events : 0

         Layout : far=2
     Chunk Size : 512K

   Device Role : Active device 0
   Array State : AA ('A' == active, '.' == missing, 'R' == replacing)
--
/dev/sde:
          Magic : a92b4efc
        Version : 1.2
    Feature Map : 0x1
     Array UUID : 479f07e1:7e6b352b:55757430:d28b9be6
           Name : jfd:4  (local to host jfd)
  Creation Time : Wed Nov 16 22:34:05 2016
     Raid Level : raid10
   Raid Devices : 2

 Avail Dev Size : 7813775024 (3725.90 GiB 4000.65 GB)
     Array Size : 3906886656 (3725.90 GiB 4000.65 GB)
  Used Dev Size : 7813773312 (3725.90 GiB 4000.65 GB)
    Data Offset : 262144 sectors
   Super Offset : 8 sectors
   Unused Space : before=262056 sectors, after=1712 sectors
          State : clean
    Device UUID : f72e5f03:cb37d925:e0feea05:6269dd86

Internal Bitmap : 8 sectors from superblock
    Update Time : Wed Nov 16 22:47:12 2016
  Bad Block Log : 512 entries available at offset 72 sectors
       Checksum : baeb6b3d - correct
         Events : 284

         Layout : far=2
     Chunk Size : 512K

   Device Role : Active device 0
   Array State : A. ('A' == active, '.' == missing, 'R' == replacing)
--
/dev/sdf:
          Magic : a92b4efc
        Version : 1.2
    Feature Map : 0x1
     Array UUID : 479f07e1:7e6b352b:55757430:d28b9be6
           Name : jfd:4  (local to host jfd)
  Creation Time : Wed Nov 16 22:34:05 2016
     Raid Level : raid10
   Raid Devices : 2

 Avail Dev Size : 7813775024 (3725.90 GiB 4000.65 GB)
     Array Size : 3906886656 (3725.90 GiB 4000.65 GB)
  Used Dev Size : 7813773312 (3725.90 GiB 4000.65 GB)
    Data Offset : 262144 sectors
   Super Offset : 8 sectors
   Unused Space : before=262056 sectors, after=1712 sectors
          State : active
    Device UUID : 50ec246d:2463dd89:d738ce24:e87dace0

Internal Bitmap : 8 sectors from superblock
    Update Time : Wed Nov 16 22:47:09 2016
  Bad Block Log : 512 entries available at offset 72 sectors
       Checksum : 6f7db65 - correct
         Events : 278

         Layout : far=2
     Chunk Size : 512K

   Device Role : Active device 1
   Array State : AA ('A' == active, '.' == missing, 'R' == replacing)
--

--- /proc/cmdline
placeholder root=UUID=9833fb2e-29f4-40d5-8dea-62b39bc628e9 ro mem=2G console=tty0 consoleblank=0 console=hvc0 intremap=no_x2apic_optout

--- grub2:
	set root='mduuid/400bac1de2c5d6effea3b8c8bcb70f8f'
	linux	/vmlinuz-3.16.0-4-amd64 root=UUID=9833fb2e-29f4-40d5-8dea-62b39bc628e9 ro mem=2G console=tty0 consoleblank=0 console=hvc0 intremap=no_x2apic_optout 
		set root='mduuid/400bac1de2c5d6effea3b8c8bcb70f8f'
		linux	/vmlinuz-3.16.0-4-amd64 root=UUID=9833fb2e-29f4-40d5-8dea-62b39bc628e9 ro mem=2G console=tty0 consoleblank=0 console=hvc0 intremap=no_x2apic_optout 
		set root='mduuid/400bac1de2c5d6effea3b8c8bcb70f8f'
		linux	/vmlinuz-3.16.0-4-amd64 root=UUID=9833fb2e-29f4-40d5-8dea-62b39bc628e9 ro single mem=2G console=tty0 consoleblank=0 console=hvc0 intremap=no_x2apic_optout
	set root='mduuid/400bac1de2c5d6effea3b8c8bcb70f8f'
	module	/vmlinuz-3.16.0-4-amd64 placeholder root=UUID=9833fb2e-29f4-40d5-8dea-62b39bc628e9 ro mem=2G console=tty0 consoleblank=0 console=hvc0 intremap=no_x2apic_optout 
			set root='mduuid/400bac1de2c5d6effea3b8c8bcb70f8f'
			module	/vmlinuz-3.16.0-4-amd64 placeholder root=UUID=9833fb2e-29f4-40d5-8dea-62b39bc628e9 ro mem=2G console=tty0 consoleblank=0 console=hvc0 intremap=no_x2apic_optout 
			set root='mduuid/400bac1de2c5d6effea3b8c8bcb70f8f'
			module	/vmlinuz-3.16.0-4-amd64 placeholder root=UUID=9833fb2e-29f4-40d5-8dea-62b39bc628e9 ro single mem=2G console=tty0 consoleblank=0 console=hvc0 intremap=no_x2apic_optout
			set root='mduuid/400bac1de2c5d6effea3b8c8bcb70f8f'
			module	/vmlinuz-3.16.0-4-amd64 placeholder root=UUID=9833fb2e-29f4-40d5-8dea-62b39bc628e9 ro mem=2G console=tty0 consoleblank=0 console=hvc0 intremap=no_x2apic_optout 
			set root='mduuid/400bac1de2c5d6effea3b8c8bcb70f8f'
			module	/vmlinuz-3.16.0-4-amd64 placeholder root=UUID=9833fb2e-29f4-40d5-8dea-62b39bc628e9 ro single mem=2G console=tty0 consoleblank=0 console=hvc0 intremap=no_x2apic_optout
			set root='mduuid/400bac1de2c5d6effea3b8c8bcb70f8f'
			module	/vmlinuz-3.16.0-4-amd64 placeholder root=UUID=9833fb2e-29f4-40d5-8dea-62b39bc628e9 ro mem=2G console=tty0 consoleblank=0 console=hvc0 intremap=no_x2apic_optout 
			set root='mduuid/400bac1de2c5d6effea3b8c8bcb70f8f'
			module	/vmlinuz-3.16.0-4-amd64 placeholder root=UUID=9833fb2e-29f4-40d5-8dea-62b39bc628e9 ro single mem=2G console=tty0 consoleblank=0 console=hvc0 intremap=no_x2apic_optout
	set root='mduuid/400bac1de2c5d6effea3b8c8bcb70f8f'
	set root='mduuid/400bac1de2c5d6effea3b8c8bcb70f8f'
	set root='mduuid/400bac1de2c5d6effea3b8c8bcb70f8f'
	set root='mduuid/400bac1de2c5d6effea3b8c8bcb70f8f'

--- udev:
ii  udev           215-17+deb8u amd64        /dev/ and hotplug management daem
e95faba71945b1dcc9749adc5dcd80f6  /lib/udev/rules.d/63-md-raid-arrays.rules
f0b45148fbd3ce678e682925483f17dc  /lib/udev/rules.d/64-md-raid-assembly.rules
13e82ea039db387bce78de8e7aeb2f34  /lib/udev/rules.d/99-systemd.rules

--- /dev:
brw-rw---- 1 root disk 9, 0 Nov 17 14:49 /dev/md0
brw-rw---- 1 root disk 9, 1 Nov 17 14:49 /dev/md1
brw-rw---- 1 root disk 9, 2 Nov 17 14:49 /dev/md2
brw-rw---- 1 root disk 9, 3 Nov 17 14:49 /dev/md3

/dev/disk/by-id:
total 0
lrwxrwxrwx 1 root root  9 Nov 17 14:49 ata-SAMSUNG_MZ7KM1T9HAJM-00005_S2HNNAAH200422 -> ../../sdd
lrwxrwxrwx 1 root root  9 Nov 17 14:49 ata-SAMSUNG_MZ7KM1T9HAJM-00005_S2HNNAAH200633 -> ../../sdc
lrwxrwxrwx 1 root root  9 Nov 17 14:49 ata-SATA_SSD_AF34075A182400165227 -> ../../sdb
lrwxrwxrwx 1 root root 10 Nov 17 14:49 ata-SATA_SSD_AF34075A182400165227-part1 -> ../../sdb1
lrwxrwxrwx 1 root root 10 Nov 17 14:49 ata-SATA_SSD_AF34075A182400165227-part2 -> ../../sdb2
lrwxrwxrwx 1 root root 10 Nov 17 14:49 ata-SATA_SSD_AF34075A182400165227-part3 -> ../../sdb3
lrwxrwxrwx 1 root root 10 Nov 17 14:49 ata-SATA_SSD_AF34075A182400165227-part4 -> ../../sdb4
lrwxrwxrwx 1 root root 10 Nov 17 14:49 ata-SATA_SSD_AF34075A182400165227-part5 -> ../../sdb5
lrwxrwxrwx 1 root root  9 Nov 17 14:49 ata-SATA_SSD_AF34075A1A2400166148 -> ../../sda
lrwxrwxrwx 1 root root 10 Nov 17 14:49 ata-SATA_SSD_AF34075A1A2400166148-part1 -> ../../sda1
lrwxrwxrwx 1 root root 10 Nov 17 14:49 ata-SATA_SSD_AF34075A1A2400166148-part2 -> ../../sda2
lrwxrwxrwx 1 root root 10 Nov 17 14:49 ata-SATA_SSD_AF34075A1A2400166148-part3 -> ../../sda3
lrwxrwxrwx 1 root root 10 Nov 17 14:49 ata-SATA_SSD_AF34075A1A2400166148-part4 -> ../../sda4
lrwxrwxrwx 1 root root 10 Nov 17 14:49 ata-SATA_SSD_AF34075A1A2400166148-part5 -> ../../sda5
lrwxrwxrwx 1 root root  9 Nov 17 14:49 ata-ST4000LM016-1N2170_W801AFT9 -> ../../sde
lrwxrwxrwx 1 root root  9 Nov 17 14:49 ata-ST4000LM016-1N2170_W801AG9F -> ../../sdf
lrwxrwxrwx 1 root root 10 Nov 17 14:49 dm-name-domvg-dom0_doc -> ../../dm-0
lrwxrwxrwx 1 root root 10 Nov 17 14:49 dm-name-domvg-dom0_home -> ../../dm-2
lrwxrwxrwx 1 root root 10 Nov 17 14:49 dm-name-domvg-dom0_var -> ../../dm-1
lrwxrwxrwx 1 root root 10 Nov 17 14:49 dm-uuid-LVM-gOTuBTypMhqYb4pOo9FbuOS8U1hEcoSFJOCKmrhzAc4vynufxnIIliSTRdqesEdb -> ../../dm-1
lrwxrwxrwx 1 root root 10 Nov 17 14:49 dm-uuid-LVM-gOTuBTypMhqYb4pOo9FbuOS8U1hEcoSFQe8tSAoWTmw0mx3TjZeQO5PZE3EtZx8K -> ../../dm-2
lrwxrwxrwx 1 root root 10 Nov 17 14:49 dm-uuid-LVM-gOTuBTypMhqYb4pOo9FbuOS8U1hEcoSFgFN0XHVfFo34QmSHdOFx0jrdy5WO0YuM -> ../../dm-0
lrwxrwxrwx 1 root root  9 Nov 17 14:49 md-name-tbd:0 -> ../../md0
lrwxrwxrwx 1 root root  9 Nov 17 14:49 md-name-tbd:1 -> ../../md1
lrwxrwxrwx 1 root root  9 Nov 17 14:49 md-name-tbd:2 -> ../../md2
lrwxrwxrwx 1 root root  9 Nov 17 14:49 md-name-tbd:3 -> ../../md3
lrwxrwxrwx 1 root root  9 Nov 17 14:49 md-uuid-039b3427:4be5157a:6e2d53bd:fe898803 -> ../../md2
lrwxrwxrwx 1 root root  9 Nov 17 14:49 md-uuid-30f745ce:7ed41b53:4df72181:7406ea1d -> ../../md3
lrwxrwxrwx 1 root root  9 Nov 17 14:49 md-uuid-400bac1d:e2c5d6ef:fea3b8c8:bcb70f8f -> ../../md0
lrwxrwxrwx 1 root root  9 Nov 17 14:49 md-uuid-e29c8b89:705f0116:d888f77e:2b6e32f5 -> ../../md1
lrwxrwxrwx 1 root root  9 Nov 17 14:49 wwn-0x5000c5009be68733 -> ../../sdf
lrwxrwxrwx 1 root root  9 Nov 17 14:49 wwn-0x5000c5009be69c9e -> ../../sde
lrwxrwxrwx 1 root root  9 Nov 17 14:49 wwn-0x5002538c0007e4bb -> ../../sdd
lrwxrwxrwx 1 root root  9 Nov 17 14:49 wwn-0x5002538c0007e7a8 -> ../../sdc

/dev/disk/by-label:
total 0
lrwxrwxrwx 1 root root  9 Nov 17 14:49 boot -> ../../md0
lrwxrwxrwx 1 root root 10 Nov 17 14:49 doc -> ../../dm-0
lrwxrwxrwx 1 root root 10 Nov 17 14:49 home -> ../../dm-2
lrwxrwxrwx 1 root root  9 Nov 17 14:49 root -> ../../md1
lrwxrwxrwx 1 root root 10 Nov 17 14:49 var -> ../../dm-1

/dev/disk/by-path:
total 0
lrwxrwxrwx 1 root root 9 Nov 17 14:49 pci-0000:01:00.0-sas-0x4433221100000000-lun-0 -> ../../sdc
lrwxrwxrwx 1 root root 9 Nov 17 14:49 pci-0000:01:00.0-sas-0x4433221101000000-lun-0 -> ../../sdd
lrwxrwxrwx 1 root root 9 Nov 17 14:49 pci-0000:01:00.0-sas-0x4433221106000000-lun-0 -> ../../sde
lrwxrwxrwx 1 root root 9 Nov 17 14:49 pci-0000:01:00.0-sas-0x4433221107000000-lun-0 -> ../../sdf

/dev/disk/by-uuid:
total 0
lrwxrwxrwx 1 root root 10 Nov 17 14:49 1cd39e0b-a09a-4c5e-b243-186c9454c797 -> ../../dm-2
lrwxrwxrwx 1 root root 10 Nov 17 14:49 565aa74f-84d4-4b5c-9b98-0a0700e14e46 -> ../../dm-1
lrwxrwxrwx 1 root root 10 Nov 17 14:49 7813a916-3a02-43a2-8dfc-66665f52eb9e -> ../../dm-0
lrwxrwxrwx 1 root root  9 Nov 17 14:49 9833fb2e-29f4-40d5-8dea-62b39bc628e9 -> ../../md1
lrwxrwxrwx 1 root root  9 Nov 17 14:49 b6345440-5a68-48d0-bb09-151069e0ceb9 -> ../../md0
lrwxrwxrwx 1 root root  9 Nov 17 14:49 c07b114d-d0a3-41ba-a0eb-ceaf7a1c78f4 -> ../../md2

/dev/md:
total 0
lrwxrwxrwx 1 root root 6 Nov 17 14:49 0 -> ../md0
lrwxrwxrwx 1 root root 6 Nov 17 14:49 1 -> ../md1
lrwxrwxrwx 1 root root 6 Nov 17 14:49 2 -> ../md2
lrwxrwxrwx 1 root root 6 Nov 17 14:49 3 -> ../md3

Auto-generated on Thu, 17 Nov 2016 17:43:02 +0000 by mdadm bugscript

-- System Information:
Debian Release: 8.6
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 3.16.0-4-amd64 (SMP w/2 CPU cores)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages mdadm depends on:
ii  debconf [debconf-2.0]  1.5.56
ii  initscripts            2.88dsf-59
ii  libc6                  2.19-18+deb8u6
ii  lsb-base               4.1+Debian13+nmu1
ii  udev                   215-17+deb8u5

Versions of packages mdadm recommends:
ii  exim4-daemon-light [mail-transport-agent]  4.84.2-2+deb8u1
ii  kmod                                       18-3

mdadm suggests no packages.

-- Configuration Files:
/etc/logcheck/violations.d/mdadm [Errno 13] Permission denied: u'/etc/logcheck/violations.d/mdadm'

-- debconf information:
* mdadm/autocheck: true
  mdadm/initrdstart_msg_errexist:
* mdadm/start_daemon: true
* mdadm/initrdstart: all
  mdadm/initrdstart_msg_errmd:
  mdadm/initrdstart_notinconf: false
  mdadm/initrdstart_msg_intro:
* mdadm/mail_to: root
  mdadm/initrdstart_msg_errblock:
  mdadm/initrdstart_msg_errconf:



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