I would like to have a setting, where Ubuntu Server is installed and booting from a flash drive (SanDisk Cruzer Fit 8GB), with two HDDs running in RAID1 and 4 drives running with RAID0. All drives, except for the pen drive should be encrypted and decrypted when booting up the system, thus, unplugging the pen drive would render the whole system useless. There should be a backup of the pen drive somewhere, just in case the pen drive burns down.
All HDDs should run LVM2. All the writing of files should be on the HDD and only on very rare occasions on the flash drive, since it is really slow.
Are there any good tutorials for this kind up setup?