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!
