Add jupiter base

Signed-off-by: Nikolaos Karaolidis <nick@karaolidis.com>

hosts/jupiter/README.md

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+# jupiter
+
+## Post-Install Checklist
+
+## RAID Management
+
+Remember to update [format.nix](format.nix).
+
+### Adding a new drive
+
+```
+parted /dev/sdd -- mklabel gpt
+parted /dev/sdd -- mkpart primary 0% 100%
+cryptsetup luksFormat /dev/sdd
+cryptsetup open /dev/sdd storage2
+btrfs device add /dev/mapper/storage2 /mnt/storage
+btrfs balance start -dconvert=raid1 -mconvert=raid1 /mnt/storage
+```
+
+### Removing an old drive
+
+```
+sudo btrfs device remove /dev/mapper/storage1 /mnt/storage
+btrfs balance start -dconvert=raid1 -mconvert=raid1 /mnt/storage
+sudo cryptsetup close storage1
+```