Arch Linux

paneves

Member

Registered: 2016-01-17

Posts: 28

[SOLVED] SDD and HDD install

Hi all:

I'm getting a new laptop that comes with a 500 Gb SDD and a 2Tb HDD. My idea is to use the SDD for all system partitions (/, /home, etc.) and use the HDD for my pictures (mounted in /home/Pictures or so...), all with EXT4.
I had planned to use LUKS on LVM and encrypt both hard drives, but I'm wondering:

1 - Will there be a (noticeable) performance penalty by encrypting the mechanical hard drive?
2- If not, can anyone point me to a guide on how to setup the system in order to open both encrypted drives with only on password? Is https://wiki.archlinux.org/index.php/Dm … iple_disks the most up-to-date procedure?

Thanks in advance:

Pedro

Last edited by paneves (2018-04-19 08:15:42)

nl6720

The Evil Wiki Admin

Registered: 2016-07-02

Posts: 596

Re: [SOLVED] SDD and HDD install

Do you want the LVM volume group to span both disks? If not, the wiki section you linked is overkill.

If the HDD will have separate VG or just a simple encrypted partition, you don't need to unlock in at the initramfs phase. Just unlock the LUKS container on the HDD from /etc/crypttab ( https://wiki.archlinux.org/index.php/dm … on_at_boot ) .

If you do want to use the same VG on both disks I suggest simply using the "sd-encrypt" hook as the tip in https://wiki.archlinux.org/index.php/Dm … iple_disks suggests.

paneves

Member

Registered: 2016-01-17

Posts: 28

Re: [SOLVED] SDD and HDD install

Sorry for taking so long in getting back to you. It was only yesterday that I got my new laptop and had a chance to try it out. I've managed to sort it out following the wiki indication based on your pointers...
Thank you very much...

Pedro