finding module

a_minor · 12-24-2008, 02:41 PM

hi all,

i'm novice in linux, I have a problem with encrypting root fs and it has failure in the following error message when i want to use cryptsetup to provide encrytion layer , with this error:

Quote:

Command failed: BLKROGET failed on device: Inappropriate ioctl for device

is seems because of not existing 'dm_mod' module in kernel, is it true?
if that's the reason, now! how can i catch it, that's not exist im my available repository, please guide me what must i do? i didn't find it in mirrors for source

Saptech · 12-26-2008, 10:53 AM

You're not saying which distro you are using but I found this on Ubuntu's forum.

Quote:

Re: HOWTO: Full encrypted system: root, home, swap
It was something simple. I was trying to make the encrypted filesystem on a mount instead of a drive or partition. Now I can run
Code:

# cryptsetup -d /etc/keys/backup create backup /dev/sdd
# mount /dev/mapper/backup mnt/usb

successfully. The incompatible libdevmapper was because I was forgetting to use 'sudo'.

Also, the following works correctly now.
Code:

# cryptsetup -c aes-cbc-essiv:sha256 -y -s 256 luksFormat /dev/sdd

Maybe it can be of help. here's the link below.

http://ubuntuforums.org/showthread.php?t=120091&page=7

a_minor · 12-26-2008, 02:54 PM

hi,
thanks that finally someone is here

yes , that was exactly what i did (with su) ,instead for using later as a root partition, as i see in this link : http://www.linuxjournal.com/print/7743

but in this way ,
when i type this code:

Code:

cryptsetup -d /etc/root-key create root /dev/sda9

i had this problem:

Code:

Command failed: BLKROGET failed on device: Inappropriate ioctl for device

that isn't because of not existence of dm_crypt module but i think that the reason is not existence of dm-mod module , but i didn't have it in my fc10 repository, and i didn't find it anywhere,

please help me!

Saptech · 12-27-2008, 02:37 PM

Sorry. That's all the help I can offer. I haven't used encryption for any OS and don't know anything about it. Try googling for more info.