Difference between revisions of "RAID"
Jump to navigation
Jump to search
Rafahsolis (talk | contribs) |
Rafahsolis (talk | contribs) |
||
| Line 39: | Line 39: | ||
unused devices: <none> | unused devices: <none> | ||
</nowiki> | </nowiki> | ||
| − | |||
| − | |||
| − | |||
| − | |||
=== Save the array layout === | === Save the array layout === | ||
| Line 49: | Line 45: | ||
Enable the array at boot time | Enable the array at boot time | ||
sudo update-initramfs -u | sudo update-initramfs -u | ||
| + | |||
| + | === Using LVM === | ||
| + | pvcreate /dev/md0 | ||
| + | vgcreate lvm_group_name /dev/md0 | ||
| + | lvcreate -L30G -nlogical_volume_group_name lvm_group_name | ||
| + | mkfs.ext4 /dev/lvm_group_name/logical_volume_group_name | ||
| + | === Using EXT4 === | ||
| + | ===== Create the filesystem ===== | ||
| + | sudo mkfs.ext4 -F /dev/md0 | ||
| + | ===== Mount the filesystem ===== | ||
| + | sudo mount /dev/md0 /mnt/md0 | ||
| + | |||
Add mount option to fstab | Add mount option to fstab | ||
echo '/dev/md0 /mnt/md0 ext4 defaults,nofail,discard 0 0' | sudo tee -a /etc/fstab | echo '/dev/md0 /mnt/md0 ext4 defaults,nofail,discard 0 0' | sudo tee -a /etc/fstab | ||
Revision as of 17:57, 20 September 2018
Create RAID 5 Ubuntu
Disk Information
lsblk -o NAME,SIZE,FSTYPE,TYPE,MOUNTPOINT
NAME SIZE FSTYPE TYPE MOUNTPOINT sda 931.5G disk └─sda1 931.5G ntfs part /var/lib/transmission-daemon/downloads/HM_30 sdb 931.5G disk └─sdb1 931.5G ntfs part sdc 931.5G disk └─sdc1 931.5G ntfs part /var/lib/transmission-daemon/downloads/HM_40 sdd 931.5G disk ├─sdd1 100M ntfs part ├─sdd2 293G ntfs part ├─sdd3 14G ntfs part ├─sdd4 1K part ├─sdd5 28G ext4 part / ├─sdd6 93.1G ext4 part /home ├─sdd7 11.2G swap part [SWAP] └─sdd8 1.9G ext4 part /var/log sdi 3.7T disk sdj 3.7T disk sdk 3.7T disk sdl 3.7T disk sr0 1024M rom
TODO: Disks order
Create RAID 5
sudo mdadm --create --verbose /dev/md0 --level=5 --raid-devices=4 /dev/sdi /dev/sdj /dev/sdk /dev/sdl
Monitor the array progress creation with
cat /proc/mdstat
Output:
Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10]
md0 : active raid5 sdl[4] sdk[2] sdj[1] sdi[0]
11720658432 blocks super 1.2 level 5, 512k chunk, algorithm 2 [4/3] [UUU_]
[>....................] recovery = 0.0% (2091700/3906886144) finish=7753.1min speed=8393K/sec
bitmap: 0/30 pages [0KB], 65536KB chunk
unused devices: <none>
Save the array layout
Wait until the array creation is finished and run:
sudo mdadm --detail --scan | sudo tee -a /etc/mdadm/mdadm.conf
Enable the array at boot time
sudo update-initramfs -u
Using LVM
pvcreate /dev/md0 vgcreate lvm_group_name /dev/md0 lvcreate -L30G -nlogical_volume_group_name lvm_group_name mkfs.ext4 /dev/lvm_group_name/logical_volume_group_name
Using EXT4
Create the filesystem
sudo mkfs.ext4 -F /dev/md0
Mount the filesystem
sudo mount /dev/md0 /mnt/md0
Add mount option to fstab
echo '/dev/md0 /mnt/md0 ext4 defaults,nofail,discard 0 0' | sudo tee -a /etc/fstab
LVM and RAID Cheatsheet
https://gist.github.com/plepe/52ecc9f18efb32c68d18
Check RAID status
mdadm -D /dev/md0
References
https://www.digitalocean.com/community/tutorials/how-to-create-raid-arrays-with-mdadm-on-ubuntu-16-04#top
https://unix.stackexchange.com/questions/88654/what-does-mdadms-spare-number-mean
https://wiki.bandaancha.st/RAID_y_LVM_en_Linux
https://zackreed.me/software-raid-5-in-debian-with-mdadm/
https://zackreed.me/adding-an-extra-disk-to-an-mdadm-array/