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

My QNAP NAS is TS-431P. Usually at https://192.168.8.167.

Volume or Storage Pool

• A storage pool combines many physical disks into one large pool of storage space and may contain one or more RAID groups.
  • However, with different sized HDDs, there will be wasted space as the minimum is the dominant.
• Multiple volumes can be created in a storage pool, enabling you to divide the storage space among different users and applications.
• Disks of different sizes and types can be mixed into one large storage space.
• Volume
  • Thick is recommended for most cases.

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. Not really a RAID.
• 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

SSH

ssh admin@192.168.8.192

The folder structure is following:

NFS

https://www.qnap.com/en/how-to/faq/article/how-to-access-files-on-nas-via-nfs-from-unixlinux-clients

• From NAS goto Network & File Services -> Win/Mac/NFS and enable NFS v2/v3 and/or NFS v4
• Click “Click here to set the NFS access right of the network share”. You will be taken to the Shared Folders menu.

Samba

Samba server works almost out of the box. Use

smbclient -L 192.168.8.192 -U admin

to see the folders and

smbclient //192.168.8.192/Public -U admin

to actually connect the server. The get command allows to download files to local computer.

Samba works on Thunar (or Nautilus) after installing gvfs, gvfs-smb and sshfs packages, see https://wiki.archlinux.org/title/Thunar#Using_Thunar_to_browse_remote_locations. Use smb://192.168.8.192 only.