some notes

how_to_add_data_disk.md

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+# Add data disk
+
+I'm trying to add a 1TB SSD drive to banky, connected to the mainboard,
+to use it as a data disk.
+
+I used `fdisk -l` to list the connected disks. The SSD already appeared
+there.
+
+I then partitioned this disk with `fdisk /dev/sda/` (/dev/sda was the
+given name for the disk. The exact name for your case can be checked by
+running `fdisk -l`). The command for partitioning is `n`.
+
+Now it's time for formatting. After some reading, apparently the right
+choice for a linux data disk would to use `ext4`. But bear in mind this
+is not compatible with windows and macos. If you have a disk that would
+like to use across different OS systems, you can pick `fat32`.
+
+To format, pick the partition (you can find it with `lsblk`) and use the 
+mkfs command.
+
+Well that was the theory, because it didn't work for me. I ended up using
+Debian's GUI disk tool. Two clicks and done.
+
+Finally, the disk needs to be mounted. To do so on every boot, you need 
+to add a line like this one to `/etc/fstab`.
+
+```
+UUID=66d23b74-677d-4122-8e67-4bc88ea03b18     /media/data_disk/   auto    rw,user,auto    0    0
+```
+
+Where the UUID should be one for the disk (you can find it out with `blkid`
+or some other of the disk utilities) and the path should exist.