LUKS encrypted physical volume on removable USB disk

[ralf]

Hi,

I am using LUKS to encrypt a removable USB disk. Encryption works but the handling is bothering me:

I used LVM to create an encrypted PV on the Disk. This was then added to VG which was used to create several LVs. So far so good. Whenever I plug in the disk, the f9 prompts me for the passphrase of the encrypted disk. On entering the passphrase it does not mount the disk, but fails to recognize the VG and the LV on top.
Where are the scripts handling encrypted removable disks so I can fiddle with them, or is there an easier way to do this?

Ralf

[LBCoder]

The easier way to do this is to NOT USE LVM!!

[domg472]

i just played with this today on rawhide. upon entering he password, the vg should be listed with vgdisplay
however there may not be an entry in /dev/mapper.

to find that you should use: /sbin/vgchange -a y VolumeGroupHereVG00

now your volume group is added and available in /dev/mapper where you can mount it:

mount /dev/mapper/VolumeGroupHereVG00-LogicalVolumeHereLV00 /data

i also found noticed a bug in selinux policy related to hald/dbus and lvm in preview. the policy maintainer is aware of it and it should be fixed soon upstream.

[ralf]

Originally Posted by LBCoder

The easier way to do this is to NOT USE LVM!!

True, I could have left lvm out of the picture, but I personally like lvm.

[ralf]

Thanks a lot for your answer. I have used this manual way for the last couple of weeks. I would like to automate the process. Would it be possible with udev?

Originally Posted by domg472

i just played with this today on rawhide. upon entering he password, the vg should be listed with vgdisplay
however there may not be an entry in /dev/mapper.

I have used vgscan in the past to actually find the volume group followed by the next command:

to find that you should use: /sbin/vgchange -a y VolumeGroupHereVG00

now your volume group is added and available in /dev/mapper where you can mount it:

mount /dev/mapper/VolumeGroupHereVG00-LogicalVolumeHereLV00 /data

i also found noticed a bug in selinux policy related to hald/dbus and lvm in preview. the policy maintainer is aware of it and it should be fixed soon upstream.

Remember to disable the volume group before removing the device:
umount /data
vgchange -a n VolumeGroup

Any ideas on automating the process? As soon as the volume is plugged in the password is asked automatically. I think this is done by Gnome-Volume-Manager. Only the vg is not recognized and the volume not mounted.