mdadm.conf issue after updating system

mdadm.conf issue after updating system

[Stefan Lamby]

Hello list.
 
I just updated my ubuntu system. The update provided a new kernel image also.
Here is what I got back:
 
update-initramfs: Generating /boot/initrd.img-3.13.0-49-generic
W: mdadm: the array /dev/md/kvm15:10 with UUID
c4540426:9c668fe2:479513f2:42d233b4
W: mdadm: is currently active, but it is not listed in mdadm.conf. if
W: mdadm: it is needed for boot, then YOUR SYSTEM IS NOW UNBOOTABLE!
W: mdadm: please inspect the output of /usr/share/mdadm/mkconf, compare
W: mdadm: it to /etc/mdadm/mdadm.conf, and make the necessary changes.
 
Is ist OK to just edit mdadm.conf and replace
ARRAY /dev/md/0 metadata=1.2 UUID=75079a2f:acb8c475:85f8ca43:0ad85c4c
name=kvm15:0
with:
ARRAY /dev/md/127 metadata=1.2 UUID=c4540426:9c668fe2:479513f2:42d233b4
name=kvm15:10
 
Or is there any other action recommended?
 
Thank you for your help.
Stefan
 
 
Here is some additonal information about the system:

root@kvm15:~# cat /proc/mdstat
Personalities : [linear] [multipath] [raid0] [raid1] [raid10] [raid6] [raid5]
[raid4]
md127 : active raid10 sdc1[1] sdb1[5] sdd1[3] sda1[4]
      3808330752 blocks super 1.2 512K chunks 2 near-copies [4/4] [UUUU]
      
unused devices: <none>


root@kvm15:~# lsblk
NAME                        MAJ:MIN RM   SIZE RO TYPE   MOUNTPOINT
sda                           8:0    0   1,8T  0 disk   
└─sda1                        8:1    0   1,8T  0 part   
  └─md127                     9:127  0   3,6T  0 raid10
    ├─vg_raid10-home (dm-0) 252:0    0   1,2T  0 lvm    /home
    ├─vg_raid10-root (dm-1) 252:1    0  93,1G  0 lvm    /
    ├─vg_raid10-var (dm-2)  252:2    0 393,1G  0 lvm    /var
    ├─vg_raid10-tmp (dm-3)  252:3    0  46,6G  0 lvm    /tmp
    └─vg_raid10-swap (dm-4) 252:4    0  23,3G  0 lvm    [SWAP]
sdb                           8:16   0   1,8T  0 disk   
└─sdb1                        8:17   0   1,8T  0 part   
  └─md127                     9:127  0   3,6T  0 raid10
    ├─vg_raid10-home (dm-0) 252:0    0   1,2T  0 lvm    /home
    ├─vg_raid10-root (dm-1) 252:1    0  93,1G  0 lvm    /
    ├─vg_raid10-var (dm-2)  252:2    0 393,1G  0 lvm    /var
    ├─vg_raid10-tmp (dm-3)  252:3    0  46,6G  0 lvm    /tmp
    └─vg_raid10-swap (dm-4) 252:4    0  23,3G  0 lvm    [SWAP]
sdc                           8:32   0   1,8T  0 disk   
└─sdc1                        8:33   0   1,8T  0 part   
  └─md127                     9:127  0   3,6T  0 raid10
    ├─vg_raid10-home (dm-0) 252:0    0   1,2T  0 lvm    /home
    ├─vg_raid10-root (dm-1) 252:1    0  93,1G  0 lvm    /
    ├─vg_raid10-var (dm-2)  252:2    0 393,1G  0 lvm    /var
    ├─vg_raid10-tmp (dm-3)  252:3    0  46,6G  0 lvm    /tmp
    └─vg_raid10-swap (dm-4) 252:4    0  23,3G  0 lvm    [SWAP]
sdd                           8:48   0   1,8T  0 disk   
└─sdd1                        8:49   0   1,8T  0 part   
  └─md127                     9:127  0   3,6T  0 raid10
    ├─vg_raid10-home (dm-0) 252:0    0   1,2T  0 lvm    /home
    ├─vg_raid10-root (dm-1) 252:1    0  93,1G  0 lvm    /
    ├─vg_raid10-var (dm-2)  252:2    0 393,1G  0 lvm    /var
    ├─vg_raid10-tmp (dm-3)  252:3    0  46,6G  0 lvm    /tmp
    └─vg_raid10-swap (dm-4) 252:4    0  23,3G  0 lvm    [SWAP]
sr0                          11:0    1   3,7G  0 rom    


   Gerät  boot.     Anfang        Ende     Blöcke   Id  System
/dev/sda1   *    98435072  3907028991  1904296960   fd  Linux raid autodetect

root@kvm15:~# cat /etc/mdadm/mdadm.conf
# mdadm.conf
#
# Please refer to mdadm.conf(5) for information about this file.
#

# by default (built-in), scan all partitions (/proc/partitions) and all
# containers for MD superblocks. alternatively, specify devices to scan, using
# wildcards if desired.
#DEVICE partitions containers

# auto-create devices with Debian standard permissions
CREATE owner=root group=disk mode=0660 auto=yes

# automatically tag new arrays as belonging to the local system
HOMEHOST <system>

# instruct the monitoring daemon where to send mail alerts
MAILADDR root

# definitions of existing MD arrays
ARRAY /dev/md/0 metadata=1.2 UUID=75079a2f:acb8c475:85f8ca43:0ad85c4c
name=kvm15:0

# This file was auto-generated on Tue, 17 Feb 2015 15:57:16 +0100
# by mkconf $Id$

root@kvm15:~# mdadm --detail /dev/md/kvm15\:10
/dev/md/kvm15:10:
        Version : 1.2
  Creation Time : Fri Mar  6 10:18:15 2015
     Raid Level : raid10
     Array Size : 3808330752 (3631.91 GiB 3899.73 GB)
  Used Dev Size : 1904165376 (1815.95 GiB 1949.87 GB)
   Raid Devices : 4
  Total Devices : 4
    Persistence : Superblock is persistent

    Update Time : Wed Apr 22 11:42:28 2015
          State : clean
 Active Devices : 4
Working Devices : 4
 Failed Devices : 0
  Spare Devices : 0

         Layout : near=2
     Chunk Size : 512K

           Name : kvm15:10  (local to host kvm15)
           UUID : c4540426:9c668fe2:479513f2:42d233b4
         Events : 14870

    Number   Major   Minor   RaidDevice State
       5       8       17        0      active sync   /dev/sdb1
       1       8       33        1      active sync   /dev/sdc1
       4       8        1        2      active sync   /dev/sda1
       3       8       49        3      active sync   /dev/sdd1
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