# more /etc/fstab
/dev/md1	/		ext3    defaults,noatime       1 1
/dev/sda2	none		swap    sw 	        
/dev/sdb2	none		swap    sw 	        
/dev/vg00/usr   /usr    	ext4    noatime,errors=remount-ro       0 2
/dev/vg00/var   /var    	ext4    noatime,errors=remount-ro       0 2
/dev/vg00/home	/home		ext4	noatime,errors=remount-ro	0 2
#/dev/hdd/data	/data		ext4	noatime,errors=remount-ro	0 2
proc		/proc		proc    nodev,noexec,nosuid     0 0


# mount
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,nosuid,relatime,size=8154408k,nr_inodes=2038602,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,noexec,relatime,size=1641468k,mode=755)
/dev/md1 on / type ext3 (rw,noatime,data=ordered)
/dev/mapper/vg00-usr on /usr type ext4 (rw,noatime,errors=remount-ro,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/freezer type cgroup (rw,nosuid,nodev,noexec,relatime,freezer)
cgroup on /sys/fs/cgroup/memory type cgroup (rw,nosuid,nodev,noexec,relatime,memory)
cgroup on /sys/fs/cgroup/perf_event type cgroup (rw,nosuid,nodev,noexec,relatime,perf_event)
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/cpu,cpuacct type cgroup (rw,nosuid,nodev,noexec,relatime,cpu,cpuacct)
cgroup on /sys/fs/cgroup/cpuset type cgroup (rw,nosuid,nodev,noexec,relatime,cpuset,clone_children)
cgroup on /sys/fs/cgroup/blkio type cgroup (rw,nosuid,nodev,noexec,relatime,blkio)
cgroup on /sys/fs/cgroup/hugetlb type cgroup (rw,nosuid,nodev,noexec,relatime,hugetlb)
cgroup on /sys/fs/cgroup/devices type cgroup (rw,nosuid,nodev,noexec,relatime,devices)
cgroup on /sys/fs/cgroup/pids type cgroup (rw,nosuid,nodev,noexec,relatime,pids)
systemd-1 on /proc/sys/fs/binfmt_misc type autofs (rw,relatime,fd=30,pgrp=1,timeout=0,minproto=5,maxproto=5,direct)
mqueue on /dev/mqueue type mqueue (rw,relatime)
debugfs on /sys/kernel/debug type debugfs (rw,relatime)
hugetlbfs on /dev/hugepages type hugetlbfs (rw,relatime)
fusectl on /sys/fs/fuse/connections type fusectl (rw,relatime)
/dev/mapper/vg00-home on /home type ext4 (rw,noatime,errors=remount-ro,data=ordered)
/dev/mapper/vg00-var on /var type ext4 (rw,noatime,errors=remount-ro,data=ordered)
tmpfs on /run/user/0 type tmpfs (rw,nosuid,nodev,relatime,size=1641468k,mode=700)

# 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/md1 UUID=6d35e4d9:3952fbd3:1f51fb89:78ee93fe level=raid1 num-devices=2 devices=/dev/sda1,/dev/sdb1
ARRAY /dev/md3 UUID=682d55c0:d40b40c9:1f51fb89:78ee93fe level=raid1 num-devices=2 devices=/dev/sda3,/dev/sdb3
#ARRAY /dev/md11 level=raid1 num-devices=2 devices=/dev/sdc1,/dev/sdd1

# /usr/share/mdadm/mkconf 
# 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/md1 UUID=6d35e4d9:3952fbd3:1f51fb89:78ee93fe
ARRAY /dev/md3 UUID=682d55c0:d40b40c9:1f51fb89:78ee93fe



# mdadm --misc --detail /dev/md1
/dev/md1:
        Version : 0.90
  Creation Time : Wed May  3 16:13:21 2017
     Raid Level : raid1
     Array Size : 4194240 (4.00 GiB 4.29 GB)
  Used Dev Size : 4194240 (4.00 GiB 4.29 GB)
   Raid Devices : 2
  Total Devices : 2
Preferred Minor : 1
    Persistence : Superblock is persistent

    Update Time : Thu May  4 00:46:29 2017
          State : clean 
 Active Devices : 2
Working Devices : 2
 Failed Devices : 0
  Spare Devices : 0

           UUID : 6d35e4d9:3952fbd3:1f51fb89:78ee93fe
         Events : 0.54

    Number   Major   Minor   RaidDevice State
       0       8        1        0      active sync   /dev/sda1
       1       8       17        1      active sync   /dev/sdb1


# mdadm --misc --detail /dev/md3
/dev/md3:
        Version : 0.90
  Creation Time : Wed May  3 16:13:21 2017
     Raid Level : raid1
     Array Size : 1947222016 (1857.02 GiB 1993.96 GB)
  Used Dev Size : 1947222016 (1857.02 GiB 1993.96 GB)
   Raid Devices : 2
  Total Devices : 2
Preferred Minor : 3
    Persistence : Superblock is persistent

    Update Time : Thu May  4 01:00:09 2017
          State : clean 
 Active Devices : 2
Working Devices : 2
 Failed Devices : 0
  Spare Devices : 0

           UUID : 682d55c0:d40b40c9:1f51fb89:78ee93fe
         Events : 0.6499

    Number   Major   Minor   RaidDevice State
       0       8        3        0      active sync   /dev/sda3
       1       8       19        1      active sync   /dev/sdb3