Sorry for the unclear statements. Here are the answers: I did not repeat the steps. /dev/sda2 holds the encrypted data. Here my description what has happened. Hopefully it becomes clearer now. What I wrote were the initial steps I perforemed when I first set up the partition (/dev/sda2). Again I did not repeat them now. After my old PC had died I installed the RAID controller in a new PC and installed Debian. (/dev/hda) cryptsetup is now already included. (Thanks for the hint Arno) Since it's a hardware controller the files on the not encrypted partition (/dev/sda1) were immediately available. Now I am looking for the steps I have to perform to access the data in the encrypted partition (/dev/sda2) again, without destroying them. When I now enter cryptsetup luksOpen /dev/sda2 tresor I get Command failed: No steup backend available Best regards Rainer -------- Original-Nachricht -------- > Datum: Wed, 12 Aug 2009 01:06:31 +0300 > Von: Moji <lordmoji@xxxxxxxxx> > An: dm-crypt@xxxxxxxx > Betreff: Re: reinstallation > I do not entirely understand your question, so I apologize if my answer > is not what you are looking for. > > If you repeated those steps then any information on /dev/sda2 will be > lost forever. > > "luksFormat" writes the luks header information, that includes the key > that decrypts the rest of the partition(device). If there is an old key > it will write over it making any old data on that luks partition > effectively unrecoverable. > > "luksOpen" uses your supplied key to decrypt the device key stored in > the header information and then maps it to /dev/mapper/. > > If I understand your original post, the "/dev/sda2" is currently > unencrypted data? If that is the case then you MUST copy that data over > to another device while you set up then encrypted partition, then > transfer it back, as the steps you listed will erase your old partition. > > -MJ > > RaMaier@xxxxxx wrote: > > Hi Hannes, > > in the documents I keep. I found that I had encrypted /dev/sda2. The > procedure I recorded was: > > umount /dev/sda2 > > cryptsetup luksFormat /dev/sda2 > > cryptsetup luksOpen /dev/sda2 tresor > > mkfs.ext3 /dev/mapper/tresor > > mount /dev/mapper/tresor /tresor > > > > What will happen if I repeat the steps ? > > Should I just leave the mkfs.ext3 out ? > > Would I be able to access my old data again ? > > What does lufsFormat really do ? Format the partition ? > > As I staded the data is pretty valuable to me. > > > > thanks for your help. > > Best regards > > Rainer > > > > > > -------- Original-Nachricht -------- > >> Datum: Tue, 11 Aug 2009 16:01:56 +0200 > >> Von: Hannes Erven <h.e@xxxxxx> > >> An: Rainer Maier <RaMaier@xxxxxx> > >> CC: dm-crypt@xxxxxxxx > >> Betreff: Re: reinstallation > > > >> Hi Rainer, > >> > >> > >>> How can I reinstall LUKS on my new Debian (Lenny)? > >> I guess the debian (and thus cryptsetup) installations on your old > >> machine weren't that up to date, right? > >> > >> With the new debian lenny, you don't need to install anything: LUKS is > >> already included in the default cryptsetup package you should already > >> have installed (http://packages.debian.org/lenny/cryptsetup ). > >> > >>> >From http://code.google.com/p/cryptsetup/: > >> "The former version of cryptsetup only had low-level operations for > >> dm-crypt ready, and around version cryptsetup-luks 1.0.5 was renamed to > >> be the official version of cryptsetup. " > >> > >> You still might have to change your old scripts, if you have some, to > >> just call cryptsetup instead of cryptsetup-luks . > >> > >> > >> HTH, best regards > >> > >> -hannes > >> > >> > >> > >> _______________________________________________ > >> dm-crypt mailing list > >> dm-crypt@xxxxxxxx > >> http://www.saout.de/mailman/listinfo/dm-crypt > > > _______________________________________________ > dm-crypt mailing list > dm-crypt@xxxxxxxx > http://www.saout.de/mailman/listinfo/dm-crypt -- Jetzt kostenlos herunterladen: Internet Explorer 8 und Mozilla Firefox 3 - sicherer, schneller und einfacher! http://portal.gmx.net/de/go/chbrowser _______________________________________________ dm-crypt mailing list dm-crypt@xxxxxxxx http://www.saout.de/mailman/listinfo/dm-crypt
