4
votes
3answers
74 views

Poor IO due to LUKS/Software RAID/LVM ordering?

I'm trying to determine if I should re-setup my RAID array due to poor IO performance. First off, the system: i7 920 4 4TB WD 5400 Green drives CentOS 6.3 host Secondly, the disk setup: ...
5
votes
1answer
118 views

Trying to understand LUKS encryption

I decided to encrypt my root partition with LUKS+LVM. My ThinkPad setup: Samsung 830 128GB SSD 750GB HDD Core 2 Duo 2,5 GHz P9500 8GB RAM But the more I read, the less I understand about those ...
3
votes
3answers
165 views

Best practice to backup a LUKS encrypted device

What's the fastest method to backup and restore a luks encrypted device (e.g. a full encrypted usb-device to a image-file). The usb-device can be decrypted/accessed. I'm looking for a solution to ...
2
votes
0answers
43 views

luks single signon

I've got LUKS (Linux Unified Key Setup) running on a couple of my Linux boxes. I've looked online but haven't seen anyone document how to make it work in a single signon option, but was hoping ...
2
votes
2answers
151 views

Detecting the device of a crypto mount

I have an external eSATA-hdd on an OpenSUSE 12.2 system. The external hdd has an LVM on a dm-crypt partition. I mount it by powering it up and then doing rescan-scsi-bus.sh cryptsetup -v luksOpen ...
3
votes
1answer
336 views

BCache and disk encryption

I recently bought a new laptop with a 16Gb mSATA SSD cache drive. I haven't used that one yet. I have, however, opted for Ubuntu 13.04 with "Full Disk Encryption" for the main partition (is that ...
1
vote
1answer
147 views

Reading encrypted partition with broken LVM2 inside?

I overwrote some LVM2 metadata in much the same way as Recovering overwritten LVM metadata . That is, I attempted to install Debian 6.0.7 on a system with existing encrypted volumes and LVM2 volumes. ...
0
votes
1answer
152 views

How to remove LUKS auto-unlock?

Unfortunately my drive unlocks automatically. This makes the whole encryption useless. How do I turn off this annoying feature on a specified drive (e.g. /dev/x) ? The cryptsetup command I've found ...
1
vote
1answer
709 views

luksOpen: No key available with this passphrase

I've created a encrypted volume with LUKS at home and was looking to use it at work too. Unfortunately, that's not possible. Whyever, I'm unable to access the encrypted data on any other computer than ...
1
vote
1answer
135 views

Overwriting disk before encryption

I'm going to create encrypted lvm on my disk. As a encryption mechanism I choose dmcrypt with LUKS. Here's my question - should I overwrite (for security reasons) whole disk before creating encrypted ...
2
votes
1answer
3k views

How to remove LUKS encryption?

I tried removing LUKS encryption on my home directory using the following command: cryptsetup luksRemoveKey /dev/mapper/luks-3fd5-235-26-2625-2456f-4353fgdgd But it gives me an error saying: ...
4
votes
1answer
452 views

How to decrypt an encrypted container via ssh without entering a passphrase while requiring some client authentication?

I log in to a server via public key authentication and then mount a container (using e.g. LUKS/dm-crypt or truecrypt). At the moment, I have to enter the container password manually. Is there a way to ...
0
votes
1answer
629 views

grub2 and cryptsetup

My root node is LUKS encrypted, and it uses a key file, instead of user input password to unlock it. I know in Grub2, I can use insmod cryptodisk insmod luks cryptomount -u <uuid> But I have ...
5
votes
1answer
846 views

Umount all attached usb disks with a single command

Is there a (safe) way to umount all partitions on all attached usb devices (usb-hdds, usb-sticks) with a single commandline command, including several encrypted luks partitions? Only the partitions ...
4
votes
2answers
534 views

Are there more advanced LUKS key schemes, e.g. 2 of 3 keys needed?

It seems like the two main LUKS encryption options are: USB keyfile (see http://superuser.com/questions/149578/how-can-i-use-a-keyfile-on-a-removable-usb-drive-for-my-encrypted-root-in-debian) ...
4
votes
1answer
2k views

Linux: LUKS and multiple hard drives

I have a Debian Linux system (amd64) installed on a RAID-1 system encrypted device (LVM on LUKS) and will have a RAID-6 of >=4 disks where I'll put my data (LUKS and maybe LVM). I think the basic ...