Difference between revisions of "RAID"
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=== Create RAID 5 === | === Create RAID 5 === | ||
sudo mdadm --create --verbose /dev/md0 --level=5 --raid-devices=4 /dev/sdi /dev/sdj /dev/sdk /dev/sdl | 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: | ||
| + | <nowiki>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> | ||
| + | </nowiki> | ||
| + | |||
https://www.digitalocean.com/community/tutorials/how-to-create-raid-arrays-with-mdadm-on-ubuntu-16-04#top<br /> | https://www.digitalocean.com/community/tutorials/how-to-create-raid-arrays-with-mdadm-on-ubuntu-16-04#top<br /> | ||
https://unix.stackexchange.com/questions/88654/what-does-mdadms-spare-number-mean<br /> | https://unix.stackexchange.com/questions/88654/what-does-mdadms-spare-number-mean<br /> | ||
Revision as of 18:29, 10 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
Disks order
/dev/sdl <-- Up /dev/sdk /dev/sdj /dev/sdi <-- Down
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>
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/