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Hello,
When I installed Arch on my Dell E7240 last september, I had only one msata hard drive (128GB), but since I wanted full disk encryption, I installed arch using (I believe, since I took poor notes and followed a tutorial online) LVM on LUKS. I recently decommissioned an older laptop that had another msata drive (240GB), which I would like to be able to use in the Dell, since it has an extra msata port. It would be easiest to be able to just add the PV (new disk) to the existing root LV, but I have a feeling it's not that simple due to the encryption. If I'm reading the wiki correctly though, it looks like given my current setup, this might not be an option. The new drive is in there as sdb, but is currently not being used while I try to figure this all out.
I wanted to gather some opinions about what might be the best step going forward. I really would like to avoid having a separate partition (which would be easiest), as the main benefit of lvm (to me) is to be able to span volumes across disks. It looks like I would have to convert my current setup to LUKS on LVM to be able to do this, but I'm not sure what the best steps would be going forward. If it ends up having to be a full on reinstallation, I might also look into something like btrfs, since the snapshotting backup functionality looks really attractive. Basically, 128I was wondering if anyone had dealt with this kind of situation before and could offer some advice on what might be the easiest way to get my two drives to appear as one volume, with encryption (either full disk, or filesystem level).
Here are some details about the current setup:
○ lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 119.2G 0 disk
├─sda1 8:1 0 128M 0 part /boot
└─sda2 8:2 0 119.1G 0 part
└─lvm 254:0 0 119.1G 0 crypt
├─vol0-lv_swap 254:1 0 8G 0 lvm [SWAP]
└─vol0-lv_root 254:2 0 111.1G 0 lvm /
sdb 8:16 0 223.6G 0 disk ○ sudo parted -l
Model: ATA SK hynix SH920 m (scsi)
Disk /dev/sda: 128GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Disk Flags:
Number Start End Size File system Name Flags
1 1049kB 135MB 134MB fat16 EFI System boot, esp
2 135MB 128GB 128GB Linux LVM lvm
Model: ATA Crucial_CT240M50 (scsi)
Disk /dev/sdb: 240GB
Sector size (logical/physical): 512B/4096B
Partition Table: msdos
Disk Flags:
Number Start End Size Type File system Flags○ sudo fdisk -l
Disk /dev/sda: 119.2 GiB, 128035676160 bytes, 250069680 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: 5FC69071-6183-49E9-A8AE-7510F0EF0F09
Device Start End Sectors Size Type
/dev/sda1 2048 264191 262144 128M EFI System
/dev/sda2 264192 250069646 249805455 119.1G Linux LVM
Disk /dev/sdb: 223.6 GiB, 240057409536 bytes, 468862128 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: dos
Disk identifier: 0xe45966fb
Disk /dev/mapper/lvm: 119.1 GiB, 127898295808 bytes, 249801359 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk /dev/mapper/vol0-lv_swap: 8 GiB, 8589934592 bytes, 16777216 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk /dev/mapper/vol0-lv_root: 111.1 GiB, 119306977280 bytes, 233021440 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes○ sudo pvdisplay
--- Physical volume ---
PV Name /dev/mapper/lvm
VG Name vol0
PV Size 119.11 GiB / not usable 1.32 MiB
Allocatable yes (but full)
PE Size 4.00 MiB
Total PE 30493
Free PE 0
Allocated PE 30493
PV UUID xxxxx-xxxx-xxxx-xxxx-xxxx-xxxx-xxxxx○ sudo vgdisplay
--- Volume group ---
VG Name vol0
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 3
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 2
Open LV 2
Max PV 0
Cur PV 1
Act PV 1
VG Size 119.11 GiB
PE Size 4.00 MiB
Total PE 30493
Alloc PE / Size 30493 / 119.11 GiB
Free PE / Size 0 / 0
VG UUID xxxxx-xxxx-xxxx-xxxx-xxxx-xxxx-xxxxx○ sudo lvdisplay
--- Logical volume ---
LV Path /dev/vol0/lv_swap
LV Name lv_swap
VG Name vol0
LV UUID xxxxx-xxxx-xxxx-xxxx-xxxx-xxxx-xxxxx
LV Write Access read/write
LV Creation host, time archiso, 2014-09-07 13:41:27 -0400
LV Status available
# open 2
LV Size 8.00 GiB
Current LE 2048
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 254:1
--- Logical volume ---
LV Path /dev/vol0/lv_root
LV Name lv_root
VG Name vol0
LV UUID xxxxx-xxxx-xxxx-xxxx-xxxx-xxxx-xxxxx
LV Write Access read/write
LV Creation host, time archiso, 2014-09-07 13:41:58 -0400
LV Status available
# open 1
LV Size 111.11 GiB
Current LE 28445
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 254:2○ cat /etc/fstab
#
# /etc/fstab: static file system information
#
# <file system> <dir> <type> <options> <dump> <pass>
# /dev/mapper/vol0-lv_root
UUID=xxxxx-xxxx-xxxx-xxxx-xxxx-xxxx-xxxxx / ext4 rw,relatime,data=ordered 0 1
# /dev/sda1
UUID=xxxx-xxxx /boot vfat rw,relatime,fmask=0022,dmask=0022,codepage=437,iocharset=iso8859-1,shortname=mixed,errors=remount-ro 0 2
# /dev/mapper/vol0-lv_swap
UUID=xxxxx-xxxx-xxxx-xxxx-xxxx-xxxx-xxxxx none swap defaults 0 0Last edited by jat255 (2015-06-15 15:15:08)
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