当我运行 sudo update-initramfs -u 或 apt-get upgrade 时，我收到以下警告：
W: mdadm: the array /dev/md0 with UUID 5bb9de94:f4c6b44f:2c027820:a8368d69
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.
我尝试使用 Google 来寻找解决方案。另外，我认为 mdadm.conf 中的 uuid 是正确的。
我认为唯一奇怪的是 /etc/mdadm/mdadm.conf 的内容与 /usr/share/mdadm/mkconf 的输出不同。
我该如何解决这个警告？
md0的信息：
dev/md0:
Version : 1.2
Creation Time : Sun Jul 17 02:15:47 2016
Raid Level : raid5
Array Size : 5860150272 (5588.67 GiB 6000.79 GB)
Used Dev Size : 1953383424 (1862.89 GiB 2000.26 GB)
Raid Devices : 4
Total Devices : 4
Persistence : Superblock is persistent
Intent Bitmap : Internal
Update Time : Wed Jan 25 12:48:51 2017
State : clean
Active Devices : 4
Working Devices : 4
Failed Devices : 0
Spare Devices : 0
Layout : left-symmetric
Chunk Size : 1024K
Name : ubuntu-nas:0
UUID : 5bb9de94:f4c6b44f:2c027820:a8368d69
Events : 2811
Number Major Minor RaidDevice State
0 8 16 0 active sync /dev/sdb
1 8 32 1 active sync /dev/sdc
2 8 48 2 active sync /dev/sdd
3 8 64 3 active sync /dev/sde
“cat /etc/mdadm/mdadm.conf” 的输出
# 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=20ae8d0e:b8961a49:a5ae8fdb:77005216 name=ubuntu-nas:0
# This file was auto-generated on Sun, 17 Jul 2016 01:35:19 +0800
# by mkconf $Id$
#ARRAY /dev/md0 uuid=ace08019:818a2a70:f657877c:53ac421b
ARRAY /dev/md0 uuid=5bb9de94:f4c6b44f:2c027820:a8368d69
“/usr/share/mdadm/mkconf”的输出：
# 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
“cat /etc/fstab”的输出：
# /etc/fstab: static file system information.
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point> <type> <options> <dump> <pass>
# / was on /dev/sdd1 during installation
UUID=5c71f0e0-4f8f-44c8-9ee1-4175a8c5d31d / ext4 errors=remount-ro 0 1
# swap was on /dev/sdc5 during installation
#UUID=6c90b7ac-7849-4a61-ba41-076f767c36c4 none swap sw 0 0
/dev/mapper/cryptswap1 none swap sw 0 0
/dev/vlm1/lv1 /mnt/vlm1/lv1 ext4 user 0 1
我已经看过了这个问题
答案1
在 Ubuntu 16.04 上，使用 mdadm 3.3，所有命令都以 'root' 身份执行 - 否则请在前面加上 sudo：
在同一个角落挣扎了 48 小时之后，我发现所有的问题都可以通过应用这个序列得到解决，必要时可以重复应用：
cat /proc/mdstat如果出现任何你不想要的 mdxxx，请使用以下命令将其删除
mdadm --stop /dev/mdxxx mdadm --remove /dev/mdxxx最重要的是，使用以下命令清除相应的磁盘分片
mdadm --zero-superblock /dev/sdxn如果缺少任何 mdyyy，请添加它。
- 再次运行
cat /proc/mdstat以确保一切符合要求。 使用以下命令更新配置文件：
mdadm --detail --scan >>/etc/mdadm/mdadm.conf然后使用简单的编辑（vi、nano 或任何你喜欢的）删除任何可能的重复条目
/etc/mdadm/mdadm.conf如果配置文件正确，则使用它更新 initramfs：
update-initramfs -u重新启动并验证，直到完美适口。