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harddrive_setup [2011/11/03 14:53] – GjQmKvfF 12.133.183.105harddrive_setup [2012/06/18 00:40] memeruiz
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-E7WnQ5 , [url=http://akvtpaplggkp.com/]akvtpaplggkp[/url][link=http://gzzscmdmqfod.com/]gzzscmdmqfod[/link], http://xnkoymtksopn.com/+====== 2 x 3TB + GPT + Grub2 + RAID + LVM + ENCRYPTION ====== 
 + 
 +The idea is to have two harddrives in mirror mode with complete system encryption. 
 +For each harddrive we need a BIOS boot partition with grub core.img stuff in them. They have to be configured and installed (in grub) in such a way that each harddrive can boot from itself. 
 +I have decided to have the swap partitions not in any RAID configuration. Each harddrive will have a separated swap partition, each swap will be encrypted with a random key.  
 +The rest of the disk is the whole linux system (including /boot). This is going to be a RAID1 (copy) with a LVM on top (to allow future extension) and encryption on top. 
 + 
 +In each harddrive do the following: 
 + 
 +  * Create GPT partition table with gdisk. (Check that the alignment is to 2048-sectors for 4Kb harddrives, if not set it like that) 
 +  * Create a BIOS boot partition of 1MB (necessary for grub2 on GPT disks) 
 +  * Create a Linux swap partition (2G) 
 +  * Create a Linux RAID partition (the rest of space) 
 + 
 +Now in the first harddrive do: 
 + 
 +  * Create the Linux RAID1 device: 
 + 
 +  mdadm --create md0 --level=1 --raid-devices=2 -R /dev/sdf3 missing 
 + 
 +  * Replace "missing" for your second drive if its already connected. 
 + 
 +  * For some reason the drive is read only still: 
 + 
 +  md0 : active (auto-read-only) raid1 sdf3[0] 
 +        ?????? blocks super 1.2 [2/1] [U_] 
 + 
 +  * Make it read/write 
 + 
 +  mdadm --readwrite /dev/md/md0  
 +   
 +  * Update /etc/mdadm/mdadm.conf 
 + 
 +  mdadm --examine --scan >> /etc/mdadm/mdadm.conf 
 + 
 +  * Create an LVM2 logical block device on top of this RAID: 
 + 
 +  pvcreate /dev/md/md0 
 +  vgcreate test /dev/md/md0 
 +  lvcreate -l 100%VG -n root test 
 + 
 +  * Create a dm-crypt on top of the LVM: 
 + 
 +  modprobe sha512_generic 
 +  modprobe aes_generic 
 +  modprobe aes-x86_64 
 +  cryptsetup -y luksFormat /dev/test/root -c aes-xts-plain64 -s 512 
 + 
 +  * Activate dm-crypt: 
 + 
 +  cryptsetup luksOpen /dev/mapper/test-root test-root_crypt 
 + 
 +  * Create ext4 partition: 
 + 
 +  mkfs.ext4 /dev/mapper/test-root_crypt 
 + 
 + 
 +In this moment the disk is ready for installing software on it. What I'm trying to do is to copy my old harddrive installation into this new system. I will probably copy this using rsync, but first I want to check if the ext4 filesystem can be seen by grub2. I plan to test this from the grub console on my currently running system. 
 + 
 +===== Important commands ===== 
 + 
 +blkid - lists uuids of block devices, could be useful for configuring grub. 
 +grub-mkdevicemap - could be necessary if you add more harddrives and want to install grub in the new harddrives. 
 + 
 + 
 + 
 +  
harddrive_setup.txt · Last modified: 2021/02/01 05:55 by 127.0.0.1