I have a CentOS 6.6 desktop and chose the encrypt option upon installation. This created a LUKS volume group. Everything works fine, but I want to add an additional drive to the volume group.
From reading and loads of googling I believe the process is to encrypt the drive first and then add it to the volume group.
--- Physical volume --- PV Name /dev/mapper/luks-9f2577eb-... VG Name vg_iridium PV Size 931.51 GiB / not usable 2.00 MiB Allocatable yes (but full) PE Size 4.00 MiB Total PE 238466 Free PE 0 Allocated PE 238466 PV UUID jI2Ir0-0Wbe-Gi1H-BxfX-5pTn-hOkO-W1qWZt --- Physical volume --- PV Name /dev/mapper/luks-3a17bbe1-... VG Name vg_iridium PV Size 223.08 GiB / not usable 0 Allocatable yes (but full) PE Size 4.00 MiB Total PE 57108 Free PE 0 Allocated PE 57108 PV UUID 10EZFc-LLD2-lve7-bM7E-YU7f-rNpe-A0jW8q "/dev/sdc1" is a new physical volume of "931.51 GiB" --- NEW Physical volume --- PV Name /dev/sdc1 VG Name PV Size 931.51 GiB Allocatable NO PE Size 0 Total PE 0 Free PE 0 Allocated PE 0 PV UUID 0gROMW-kB52-BLrr-hIf4-lGP6-XTnf-YOcyS7
I tried using
cryptsetup luksFormat /dev/sdc1
and it asked me for a new password. Not sure how to proceed, I thought I'd better ask for pointers than mess the system up.
The question is can I add a new drive to a LUKS encrypted logical volume?
I found this answer: Resizing a LUKS encrypted volume to a similar query but the answer states that I should unmount the filesystem first. The problem is that my filesystem is used so how can I unmount it?
Any pointers are more than welcome. Thanks!