====== Generalidades de RAID ======
====== RAID ======
<code bash>
VBoxManage list vms
</code>

Creando los discos en Virtualbox para maquina ubuntu18_prueba1

<code bash>
VBoxManage createmedium disk --filename VirtualBox\ VMs/ubuntu18_prueba1/disco1.dvi --size 1024 --format VDI --variant Standard
VBoxManage storageattach ubuntu18_prueba1 --storagectl "SATA" --port 2 --type hdd --medium VirtualBox\ VMs/ubuntu18_prueba1/disco1.dvi 


VBoxManage createmedium disk --filename VirtualBox\ VMs/ubuntu18_prueba1/disco2.dvi --size 1024 --format VDI --variant Standard
VBoxManage storageattach ubuntu18_prueba1 --storagectl "SATA" --port 3 --type hdd --medium VirtualBox\ VMs/ubuntu18_prueba1/disco2.dvi 

VBoxManage startvm ubuntu18_prueba1 --type headless

VBoxManage list runningvms

</code>


Creamos las particiones

<code bash>

gdisk /dev/sdb

gdisk /dev/sdc


lsblk 
NAME   MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
loop0    7:0    0 88.5M  1 loop /snap/core/7270
loop1    7:1    0 89.1M  1 loop /snap/core/8039
sda      8:0    0   10G  0 disk 
├─sda1   8:1    0    1M  0 part 
└─sda2   8:2    0   10G  0 part /
sdb      8:16   0    1G  0 disk 
└─sdb1   8:17   0 1023M  0 part 


</code>

//**mdadm**//
<code bash>

mdadm --create /dev/md0 --level=1 --raid-disks=2 /dev/sdb1  /dev/sdc1

mkfs.ext4 /dev/md0

mkdir /mnt/raid

mount /dev/md0  /mnt/raid/

umount /dev/md0  

cat /proc/mdstat

mdadm --detail /proc/mdstat

mdadm --detail --scan

mdadm --detail --scan >> /etc/mdadm/mdadm.conf

echo '/dev/md0 /mnt/raid ext4 defaults,nofail,discard 0 0' | sudo tee -a /etc/fstab

update-initramfs -u

reboot

</code>

====== Referencias ======


  * https://www.digitalocean.com/community/tutorials/how-to-create-raid-arrays-with-mdadm-on-ubuntu-16-04