Pada tutorial sebelumnya, kita sudah belajar mengenai RAID berikut: Belajar RAID
Dan pada tutorial kali ini kita akan mencoba bagaimana cara membuat RAID yang sudah kita pelajari sebelumnya. Untuk membuat RAID bisa menggunakan service mdadm oleh karena itu kita perlu install terlebih dahulu mdadm di CentOS 8.
Di CentOS 8 mdadm sudah tersedia secara default di repository berikut
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
[root@raid-belajarlinux ~]# dnf info mdadm
Last metadata expiration check: 0:12:32 ago on Sat 12 Sep 2020 11:45:54 AM UTC.
Available Packages
Name : mdadm
Version : 4.1
Release : 13.el8
Architecture : x86_64
Size : 453 k
Source : mdadm-4.1-13.el8.src.rpm
Repository : BaseOS
Summary : The mdadm program controls Linux md devices (software RAID arrays)
URL : http://www.kernel.org/pub/linux/utils/raid/mdadm/
License : GPLv2+
Description : The mdadm program is used to create, manage, and monitor Linux MD (software
: RAID) devices. As such, it provides similar functionality to the raidtools
: package. However, mdadm is a single program, and it can perform
: almost all functions without a configuration file, though a configuration
: file can be used to help with some common tasks.
[root@raid-belajarlinux ~]#
Untuk instalasi mdadm di CentOS 8 jalankan perintah berikut
1
2
[root@raid-belajarlinux ~]#
[root@raid-belajarlinux ~]# dnf install mdadm -y
Cek versi mdadm
1
2
3
4
[root@raid-belajarlinux ~]#
[root@raid-belajarlinux ~]# mdadm --version
mdadm - v4.1 - 2018-10-01
[root@raid-belajarlinux ~]#
Selanjutnya terdapat 5 level RAID yang akan kita buat pada tutorial ini yaitu level RAID 0, 1, 5, 6 dan 10, sebelum membuat RAID perlu di ketahui pada tutorial kali ini kami akan memberi tahu cara membuat masing – masing RAID dan diakhir akan dibahas bagaimana cara menggunakan RAID misalnya RAID 10 kita jadikan sebagai Ext4 dan di mounting misalnya ke _ home. _
Level RAID 0
Untuk membuat RAID 0 kita minimal mempunyai 2 disk/volume/storage
| Nama Volume | Size Volume |
| vdb | 10 GB |
| vdc | 10 GB |
Gunakna perintah berikut untuk melihat volume yang sudah di attach ke Instance/VM
1
2
3
4
5
6
7
8
[root@raid-belajarlinux ~]#
[root@raid-belajarlinux ~]# lsblk -o NAME,SIZE,FSTYPE,TYPE,MOUNTPOINT
NAME SIZE FSTYPE TYPE MOUNTPOINT
vda 60G disk
└─vda1 60G xfs part /
vdb 10G disk
vdc 10G disk
[root@raid-belajarlinux ~]#
Untuk membuat RAID 0 jalankan perintah berikut
1
2
3
4
5
6
[root@raid-belajarlinux ~]#
[root@raid-belajarlinux ~]# mdadm --create --verbose /dev/md0 --level=0 --raid-devices=2 /dev/vdb /dev/vdc
mdadm: chunk size defaults to 512K
mdadm: Defaulting to version 1.2 metadata
mdadm: array /dev/md0 started.
[root@raid-belajarlinux ~]#
Noted: Perhatikan nama volume sesuai
Cek RAID 0 yang sudah kita buat
1
2
3
4
5
6
7
8
[root@raid-belajarlinux ~]#
[root@raid-belajarlinux ~]# cat /proc/mdstat
Personalities : [raid0]
md0 : active raid0 vdc[1] vdb[0]
20953088 blocks super 1.2 512k chunks
unused devices: <none>
[root@raid-belajarlinux ~]#
Cek volume RAID 0
1
2
3
4
5
6
7
8
9
10
[root@raid-belajarlinux ~]#
[root@raid-belajarlinux ~]# lsblk -o NAME,SIZE,FSTYPE,TYPE,MOUNTPOINT
NAME SIZE FSTYPE TYPE MOUNTPOINT
vda 60G disk
└─vda1 60G xfs part /
vdb 10G linux_raid_member disk
└─md0 20G raid0
vdc 10G linux_raid_member disk
└─md0 20G raid0
[root@raid-belajarlinux ~]#
Level RAID 1
Untuk membuat RAID 1 hampir sama dengan membuat RAID 0 dimana Anda hanya perlu menyesuaikan level dan banyak nya volume yang ingin Anda gunakan, untuk RAID 1 minimal 2 volume
| Nama Volume | Size Volume |
| vdb | 10 GB |
| vdc | 10 GB |
Silakan cek volume menggunakan perintah berikut
1
2
3
4
5
6
7
[root@raid-belajarlinux ~]# lsblk -o NAME,SIZE,FSTYPE,TYPE,MOUNTPOINT
NAME SIZE FSTYPE TYPE MOUNTPOINT
vda 60G disk
└─vda1 60G xfs part /
vdb 10G disk
vdc 10G disk
[root@raid-belajarlinux ~]#
Jalankan perintah berikut, untuk membuat RAID 1
1
2
3
4
5
6
7
8
9
10
11
12
[root@raid-belajarlinux ~]#
[root@raid-belajarlinux ~]# mdadm --create --verbose /dev/md0 --level=1 --raid-devices=2 /dev/vdb /dev/vdc
mdadm: Note: this array has metadata at the start and
may not be suitable as a boot device. If you plan to
store '/boot' on this device please ensure that
your boot-loader understands md/v1.x metadata, or use
--metadata=0.90
mdadm: size set to 10476544K
Continue creating array? y
mdadm: Defaulting to version 1.2 metadata
mdadm: array /dev/md0 started.
[root@raid-belajarlinux ~]#
Jika sudah silakan cek RAID 1 yang sudah dibuat, perlu diketahui untuk RAID 1 memerlukan waktu resync antar volume
1
2
3
4
5
6
7
8
9
[root@raid-belajarlinux ~]#
[root@raid-belajarlinux ~]# cat /proc/mdstat
Personalities : [raid0] [raid1]
md0 : active raid1 vdc[1] vdb[0]
10476544 blocks super 1.2 [2/2] [UU]
[=======>.............] resync = 37.7% (3960768/10476544) finish=1.3min speed=82517K/sec
unused devices: <none>
[root@raid-belajarlinux ~]#
Cek status RAID 1
1
2
3
4
5
6
7
8
[root@raid-belajarlinux ~]#
[root@raid-belajarlinux ~]# cat /proc/mdstat
Personalities : [raid0] [raid1]
md0 : active raid1 vdc[1] vdb[0]
10476544 blocks super 1.2 [2/2] [UU]
unused devices: <none>
[root@raid-belajarlinux ~]#
Cek status volume RAID 1
1
2
3
4
5
6
7
8
9
10
[root@raid-belajarlinux ~]#
[root@raid-belajarlinux ~]# lsblk -o NAME,SIZE,FSTYPE,TYPE,MOUNTPOINT
NAME SIZE FSTYPE TYPE MOUNTPOINT
vda 60G disk
└─vda1 60G xfs part /
vdb 10G linux_raid_member disk
└─md0 10G raid1
vdc 10G linux_raid_member disk
└─md0 10G raid1
[root@raid-belajarlinux ~]#
Level RAID 5
Untuk membuat RAID 5 kita perlu memiliki minimal 3 disk/volume yang sudah ter-attach ke sisi instance
| Nama Volume | Size Volume |
| vdb | 10 GB |
| vdc | 10 GB |
| vdd | 10 GB |
Untuk melihat volume yang sudah ter-attach gunakan perintah berikut
1
2
3
4
5
6
7
8
9
[root@raid-belajarlinux ~]#
[root@raid-belajarlinux ~]# lsblk -o NAME,SIZE,FSTYPE,TYPE,MOUNTPOINT
NAME SIZE FSTYPE TYPE MOUNTPOINT
vda 60G disk
└─vda1 60G xfs part /
vdb 10G disk
vdc 10G disk
vdd 10G disk
[root@raid-belajarlinux ~]#
Untuk membuat RAID 5 jalankan perintah berikut, silakan sesuaikan level, dan nama volume Anda
1
2
3
4
5
6
7
8
[root@raid-belajarlinux ~]# mdadm --create --verbose /dev/md0 --level=5 --raid-devices=3 /dev/vdb /dev/vdc /dev/vdd
mdadm: layout defaults to left-symmetric
mdadm: layout defaults to left-symmetric
mdadm: chunk size defaults to 512K
mdadm: size set to 10476544K
mdadm: Defaulting to version 1.2 metadata
mdadm: array /dev/md0 started.
[root@raid-belajarlinux ~]#
Selanjutnya cek RAID yang kita buat, untuk RAID 5 memerlukan waktu resync antar disk/volume.
1
2
3
4
5
6
7
8
9
[root@raid-belajarlinux ~]#
[root@raid-belajarlinux ~]# cat /proc/mdstat
Personalities : [raid0] [raid1] [raid6] [raid5] [raid4]
md0 : active raid5 vdd[3] vdc[1] vdb[0]
20953088 blocks super 1.2 level 5, 512k chunk, algorithm 2 [3/2] [UU_]
[==========>..........] recovery = 53.1% (5569248/10476544) finish=0.7min speed=113291K/sec
unused devices: <none>
[root@raid-belajarlinux ~]#
Cek status RAID 5
1
2
3
4
5
6
7
8
[root@raid-belajarlinux ~]#
[root@raid-belajarlinux ~]# cat /proc/mdstat
Personalities : [raid0] [raid1] [raid6] [raid5] [raid4]
md0 : active raid5 vdd[3] vdc[1] vdb[0]
20953088 blocks super 1.2 level 5, 512k chunk, algorithm 2 [3/3] [UUU]
unused devices: <none>
[root@raid-belajarlinux ~]#
Cek status volume RAID 5
1
2
3
4
5
6
7
8
9
10
11
12
[root@raid-belajarlinux ~]#
[root@raid-belajarlinux ~]# lsblk -o NAME,SIZE,FSTYPE,TYPE,MOUNTPOINT
NAME SIZE FSTYPE TYPE MOUNTPOINT
vda 60G disk
└─vda1 60G xfs part /
vdb 10G linux_raid_member disk
└─md0 20G raid5
vdc 10G linux_raid_member disk
└─md0 20G raid5
vdd 10G linux_raid_member disk
└─md0 20G raid5
[root@raid-belajarlinux ~]#
Level RAID 6
Untuk membuat RAID 6 minimal kita memiliki 4 buah disk atau volume
| Nama Volume | Size Volume |
| vdb | 10 GB |
| vdc | 10 GB |
| vdd | 10 GB |
| vde | 10 GB |
Cek volume menggunakan perintah berikut
1
2
3
4
5
6
7
8
9
10
[root@raid-belajarlinux ~]#
[root@raid-belajarlinux ~]# lsblk -o NAME,SIZE,FSTYPE,TYPE,MOUNTPOINT
NAME SIZE FSTYPE TYPE MOUNTPOINT
vda 60G disk
└─vda1 60G xfs part /
vdb 10G disk
vdc 10G disk
vdd 10G disk
vde 10G disk
[root@raid-belajarlinux ~]#
Jalankan perintah berikut, untuk membuat RAID 6 dan silakan sesuaikan level serta nama volume
1
2
3
4
5
6
7
8
9
[root@raid-belajarlinux ~]#
[root@raid-belajarlinux ~]# mdadm --create --verbose /dev/md0 --level=6 --raid-devices=4 /dev/vdb /dev/vdc /dev/vdd /dev/vde
mdadm: layout defaults to left-symmetric
mdadm: layout defaults to left-symmetric
mdadm: chunk size defaults to 512K
mdadm: size set to 10476544K
mdadm: Defaulting to version 1.2 metadata
mdadm: array /dev/md0 started.
[root@raid-belajarlinux ~]#
Selanjutnya cek RAID yang kita buat, untuk RAID 6 memerlukan waktu resync antar disk/volume.
1
2
3
4
5
6
7
8
9
[root@raid-belajarlinux ~]#
[root@raid-belajarlinux ~]# cat /proc/mdstat
Personalities : [raid0] [raid1] [raid6] [raid5] [raid4]
md0 : active raid6 vde[3] vdd[2] vdc[1] vdb[0]
20953088 blocks super 1.2 level 6, 512k chunk, algorithm 2 [4/4] [UUUU]
[====>................] resync = 23.9% (2509924/10476544) finish=0.6min speed=193071K/sec
unused devices: <none>
[root@raid-belajarlinux ~]#
Cek status RAID 6
1
2
3
4
5
6
7
8
[root@raid-belajarlinux ~]#
[root@raid-belajarlinux ~]# cat /proc/mdstat
Personalities : [raid0] [raid1] [raid6] [raid5] [raid4]
md0 : active raid6 vde[3] vdd[2] vdc[1] vdb[0]
20953088 blocks super 1.2 level 6, 512k chunk, algorithm 2 [4/4] [UUUU]
unused devices: <none>
[root@raid-belajarlinux ~]#
Cek status volume RAID 6
1
2
3
4
5
6
7
8
9
10
11
12
13
14
[root@raid-belajarlinux ~]#
[root@raid-belajarlinux ~]# lsblk -o NAME,SIZE,FSTYPE,TYPE,MOUNTPOINT
NAME SIZE FSTYPE TYPE MOUNTPOINT
vda 60G disk
└─vda1 60G xfs part /
vdb 10G linux_raid_member disk
└─md0 20G raid6
vdc 10G linux_raid_member disk
└─md0 20G raid6
vdd 10G linux_raid_member disk
└─md0 20G raid6
vde 10G linux_raid_member disk
└─md0 20G raid6
[root@raid-belajarlinux ~]#
Level RAID 10
Untuk membuat RAID 10 hampir sama dengan RAID 6 dimana minimal kita harus mempunyai 4 disk/volume.
| Nama Volume | Size Volume |
| vdb | 10 GB |
| vdc | 10 GB |
| vdd | 10 GB |
| vde | 10 GB |
Untuk melakukan pengecekan volume gunakan perintah berikut
1
2
3
4
5
6
7
8
9
10
[root@raid-belajarlinux ~]#
[root@raid-belajarlinux ~]# lsblk -o NAME,SIZE,FSTYPE,TYPE,MOUNTPOINT
NAME SIZE FSTYPE TYPE MOUNTPOINT
vda 60G disk
└─vda1 60G xfs part /
vdb 10G disk
vdc 10G disk
vdd 10G disk
vde 10G disk
[root@raid-belajarlinux ~]#
Gunakan perintah berikut untuk membuat RAID 10
1
2
3
4
5
6
7
8
9
[root@raid-belajarlinux ~]#
[root@raid-belajarlinux ~]# mdadm --create --verbose /dev/md0 --level=10 --raid-devices=4 /dev/vdb /dev/vdc /dev/vdd /dev/vde
mdadm: layout defaults to n2
mdadm: layout defaults to n2
mdadm: chunk size defaults to 512K
mdadm: size set to 10476544K
mdadm: Defaulting to version 1.2 metadata
mdadm: array /dev/md0 started.
[root@raid-belajarlinux ~]#
Selanjutnya cek RAID yang kita buat, untuk RAID 10 memerlukan waktu resync antar disk/volume.
1
2
3
4
5
6
7
8
[root@raid-belajarlinux ~]# cat /proc/mdstat
Personalities : [raid0] [raid1] [raid6] [raid5] [raid4] [raid10]
md0 : active raid10 vde[3] vdd[2] vdc[1] vdb[0]
20953088 blocks super 1.2 512K chunks 2 near-copies [4/4] [UUUU]
[====>................] resync = 20.7% (4339136/20953088) finish=1.3min speed=206625K/sec
unused devices: <none>
[root@raid-belajarlinux ~]#
Cek status RAID 10
1
2
3
4
5
6
7
8
[root@raid-belajarlinux ~]#
[root@raid-belajarlinux ~]# cat /proc/mdstat
Personalities : [raid0] [raid1] [raid6] [raid5] [raid4] [raid10]
md0 : active raid10 vde[3] vdd[2] vdc[1] vdb[0]
20953088 blocks super 1.2 512K chunks 2 near-copies [4/4] [UUUU]
unused devices: <none>
[root@raid-belajarlinux ~]#
Cek status volume RAID 10
1
2
3
4
5
6
7
8
9
10
11
12
13
14
[root@raid-belajarlinux ~]#
[root@raid-belajarlinux ~]# lsblk -o NAME,SIZE,FSTYPE,TYPE,MOUNTPOINT
NAME SIZE FSTYPE TYPE MOUNTPOINT
vda 60G disk
└─vda1 60G xfs part /
vdb 10G linux_raid_member disk
└─md0 20G raid10
vdc 10G linux_raid_member disk
└─md0 20G raid10
vdd 10G linux_raid_member disk
└─md0 20G raid10
vde 10G linux_raid_member disk
└─md0 20G raid10
[root@raid-belajarlinux ~]#
Untuk melihat detail RAID yang sudah dibuat jalankan perintah berikut:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
[root@raid-belajarlinux ~]#
[root@raid-belajarlinux ~]# mdadm --detail /dev/md0
/dev/md0:
Version : 1.2
Creation Time : Sat Sep 12 12:54:49 2020
Raid Level : raid10
Array Size : 20953088 (19.98 GiB 21.46 GB)
Used Dev Size : 10476544 (9.99 GiB 10.73 GB)
Raid Devices : 4
Total Devices : 4
Persistence : Superblock is persistent
Update Time : Sat Sep 12 13:04:45 2020
State : clean
Active Devices : 4
Working Devices : 4
Failed Devices : 0
Spare Devices : 0
Layout : near=2
Chunk Size : 512K
Consistency Policy : resync
Name : 0
UUID : 3de67b5d:e47b0c8c:565303af:ef4a7f03
Events : 17
Number Major Minor RaidDevice State
0 252 16 0 active sync set-A /dev/vdb
1 252 32 1 active sync set-B /dev/vdc
2 252 48 2 active sync set-A /dev/vdd
3 252 64 3 active sync set-B /dev/vde
[root@raid-belajarlinux ~]#
Saat ini RAID 0, 1, 5, 6 dan 10 sudah dibuat.
[Opsional] Menghapus RAID
Ingat!. Langkah ini bisa di Anda skip atau abaikan jika tidak ingin menghapus RAID. Kami contohkan bagaimana cara hapus RAID 1.
Cek RAID 1 terlebih dahulu
1
2
3
4
5
6
7
8
9
10
[root@raid-belajarlinux ~]#
[root@raid-belajarlinux ~]# lsblk -o NAME,SIZE,FSTYPE,TYPE,MOUNTPOINT
NAME SIZE FSTYPE TYPE MOUNTPOINT
vda 60G disk
└─vda1 60G xfs part /
vdb 10G linux_raid_member disk
└─md0 10G raid1
vdc 10G linux_raid_member disk
└─md0 10G raid1
[root@raid-belajarlinux ~]#
Hapus device mdadm RAID 1 menggunakan perintah berikut
1
2
3
4
5
[root@raid-belajarlinux ~]# mdadm --remove /dev/md0
[root@raid-belajarlinux ~]# mdadm --stop /dev/md0
mdadm: stopped /dev/md0
[root@raid-belajarlinux ~]#
[root@raid-belajarlinux ~]#
Jalankan perintah lsblk kembali seperti berikut, dan pastikan device RAID 1 sudah terhapus
1
2
3
4
5
6
7
8
[root@raid-belajarlinux ~]#
[root@raid-belajarlinux ~]# lsblk -o NAME,SIZE,FSTYPE,TYPE,MOUNTPOINT
NAME SIZE FSTYPE TYPE MOUNTPOINT
vda 60G disk
└─vda1 60G xfs part /
vdb 10G linux_raid_member disk
vdc 10G linux_raid_member disk
[root@raid-belajarlinux ~]#
Namun disini data volume masih menjadi member atau block dari RAID 1 untuk menghapus nya secara total gunakan perintah berikut
1
2
3
4
5
6
7
8
9
[root@raid-belajarlinux ~]# mdadm --zero-superblock /dev/vdb /dev/vdc
[root@raid-belajarlinux ~]#
[root@raid-belajarlinux ~]# lsblk -o NAME,SIZE,FSTYPE,TYPE,MOUNTPOINT
NAME SIZE FSTYPE TYPE MOUNTPOINT
vda 60G disk
└─vda1 60G xfs part /
vdb 10G disk
vdc 10G disk
[root@raid-belajarlinux ~]#
Jadikan RAID sebagai Ext4
Disini kami contohkan menggunakan RAID 10 yang akan di jadikan sebaai Ext4
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
[root@raid-belajarlinux ~]#
[root@raid-belajarlinux ~]# cat /proc/mdstat |grep md0
md0 : active raid10 vde[3] vdd[2] vdc[1] vdb[0]
[root@raid-belajarlinux ~]#
[root@raid-belajarlinux ~]# fdisk -l |grep /dev/md0
Disk /dev/md0: 20 GiB, 21455962112 bytes, 41906176 sectors
[root@raid-belajarlinux ~]#
[root@raid-belajarlinux ~]# mkfs.ext4 -F /dev/md0
mke2fs 1.45.4 (23-Sep-2019)
Creating filesystem with 5238272 4k blocks and 1310720 inodes
Filesystem UUID: 2d39f95d-c4be-4a5d-ae4b-eff590458de6
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
4096000
Allocating group tables: done
Writing inode tables: done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done
[root@raid-belajarlinux ~]#
RAID 10 sudah di format menjadi Ext4 dan selanjutnya dapat Anda mounting ke direktori yang Anda inginkan misalnya ke direktori _ /home _
1
2
3
4
5
6
[root@raid-belajarlinux ~]#
[root@raid-belajarlinux ~]# mount /dev/md0 /home/
[root@raid-belajarlinux ~]# df -h /home/
Filesystem Size Used Avail Use% Mounted on
/dev/md0 20G 45M 19G 1% /home
[root@raid-belajarlinux ~]#
Cek size direktori _ /home _
1
2
3
4
5
6
7
8
9
10
11
[root@raid-belajarlinux ~]#
[root@raid-belajarlinux ~]# df -h
Filesystem Size Used Avail Use% Mounted on
devtmpfs 886M 0 886M 0% /dev
tmpfs 914M 0 914M 0% /dev/shm
tmpfs 914M 8.5M 906M 1% /run
tmpfs 914M 0 914M 0% /sys/fs/cgroup
/dev/vda1 60G 2.3G 58G 4% /
tmpfs 183M 0 183M 0% /run/user/1000
/dev/md0 20G 45M 19G 1% /home
[root@raid-belajarlinux ~]#
Uji coba RAID 10 misal dengan membuat direktori dan file di dalam _ /home _
1
2
3
4
5
6
[root@raid-belajarlinux ~]#
[root@raid-belajarlinux ~]# touch /home/belajarlinuxid.txt
[root@raid-belajarlinux ~]# echo "Belajar Membuat RAID ya di Belajar Linux ID" > /home/belajarlinuxid.txt
[root@raid-belajarlinux ~]# cat /home/belajarlinuxid.txt
Belajar Membuat RAID ya di Belajar Linux ID
[root@raid-belajarlinux ~]#
Konfigurasi Otomatis Mounting RAID
Biasanya jika kita tidak melakukan konfigurasi otomatis mounting volume atau RAID volume, maka pada saat instance/VM di reboot RAID akan otomatis lepas dari direktori yang sudah di mount sebelumnya contoh dalam case ini direktori _ /home. _
Untuk konfigurasinya Anda hanya perlu menambahkannya di _ fstab _ sebagai berikut
1
2
[root@raid-belajarlinux ~]#
[root@raid-belajarlinux ~]# vim /etc/fstab
Isi dan sesuaikan fstab Anda dengan direktori Anda contohnya
1
2
3
4
5
6
7
8
9
10
11
12
#
# /etc/fstab
# Created by anaconda on Mon Jan 13 21:48:59 2020
#
# Accessible filesystems, by reference, are maintained under '/dev/disk/'.
# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info.
#
# After editing this file, run 'systemctl daemon-reload' to update systemd
# units generated from this file.
#
UUID=c7b1ead0-f176-4f23-b9c7-299eb4a06cef / xfs defaults 0 0
/dev/md0 /home ext4 defaults 0 0
Verifikasi _ fstab _
1
2
3
4
[root@raid-belajarlinux ~]# mount -av
/ : ignored
/home : already mounted
[root@raid-belajarlinux ~]#
Simpan detail informasi RAID 10 mengguankan perintah berikut
1
2
[root@raid-belajarlinux ~]# mdadm --detail --scan --verbose >> /etc/mdadm.conf
[root@raid-belajarlinux ~]#
Silakan reboot instance/VM Anda untuk mengetahui hasilnya.
1
2
3
4
5
[root@raid-belajarlinux ~]#
[root@raid-belajarlinux ~]# reboot
Connection to 192.168.10.9 closed by remote host.
Connection to 192.168.10.9 closed.
255 ubuntu@my-jumper:~$
Tunggu beberapa saat proses booting instance/VM Anda dan silakan login kembali pastikan /home masih ada seperti berikut
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
ubuntu@my-jumper:~$ ssh raid
centos@192.168.10.9's password:
Activate the web console with: systemctl enable --now cockpit.socket
Last login: Sat Sep 12 16:26:49 2020 from 192.168.10.7
Could not chdir to home directory /home/centos: No such file or directory
[centos@raid-belajarlinux /]$
[centos@raid-belajarlinux /]$ sudo su
[root@raid-belajarlinux /]# cd
[root@raid-belajarlinux ~]#
[root@raid-belajarlinux ~]# df -h
Filesystem Size Used Avail Use% Mounted on
devtmpfs 886M 0 886M 0% /dev
tmpfs 914M 0 914M 0% /dev/shm
tmpfs 914M 8.5M 905M 1% /run
tmpfs 914M 0 914M 0% /sys/fs/cgroup
/dev/vda1 60G 2.3G 58G 4% /
/dev/md0 20G 45M 19G 1% /home
tmpfs 183M 0 183M 0% /run/user/0
tmpfs 183M 0 183M 0% /run/user/1000
[root@raid-belajarlinux ~]#
Selamat mencoba 😁