Mounting hdd

RAID

cat /proc/mdstat
mdadm

LVM 2

sudo vgscan
sudo vgchange -ay ubuntu-vg
sudo lvs
sudo mount /dev/ubuntu-vg/lvstuff /media/mol -o ro,user

Mount lv2m

https://superuser.com/questions/116617/how-to-mount-an-lvm-volume

Note that the mounting option needs to be read/write: $ sudo mount /dev/VolGroup00/LogVol00 /mnt/fcroot -o rw,user

LVM2 (logical volume manager)

vgdisplay
vgrename
vgchange
vgs
lvscan

PV (physical volume)

pvcreate

QNAP NAS

Raid levels. I have multiple HDD with different sizes, and need to add more hdds if needed.

• RAID 0 (striping) but losing any disk means losing all the data.
• RAID 1 (mirroring). All hdds should be identical.
• RAID 5 (parity striping) but requires at least 3 similar drives.

https://en.wikipedia.org/wiki/Standard_RAID_levels

How to convert RAID 0 to RAID 5 without losing any data?

SMB works on Network tab in Ubuntu PCManFM