Additionally lsblk might come in handy to get an idea of the current structure of the storage devices. -Sven On Tue, April 1, 2014 23:21, Heiko Rosemann wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > On 04/01/2014 09:02 PM, Biltong wrote: >> I have a raid-1 system running btrfs on top of luks. >> >> I cannot remember my passphrase, but the system is running and I >> have made a backup. >> >> I'd like to add a new passphrase, and have followed the >> instructions from 6.10 at >> > http://code.google.com/p/cryptsetup/wiki/FrequentlyAskedQuestions#6._Backup_and_Data_Recovery >> >> This worked for the first device, which seems to work with >> /dev/dm-0, but I cannot work out what the device name for the >> second raid-1 member is. The btrfs partition is on top of the luks >> device, and so I need to change both. >> > > I'm not really clear on what your setup is, but there's basically two > choices: > > 1) encrypt 2 partitions separately (typically /dev/sdxy with x in a..z > and y in > 1..) leading to /dev/mapper/a and /dev/mapper/b as links to /dev/dm-0 > and /dev/dm-1 > 2) create RAID1 from /dev/mapper/a and /dev/mapper/b, causing /dev/md0 > to appear > 3) create btrfs (or whatever) on top of /dev/md0 > > or > > 1) create RAID1 from 2 partitions (typically /dev/sdxy as above) leading > to /dev/md0 > 2) encrypt /dev/md0 leading to /dev/mapper/a as a link to /dev/dm-0 > 3) create btrfs (or whatever) on top of /dev/dm-0 > > > If you can't find /dev/dm-1, you might be using the second version. You > can also find some information in the output of the mount command (which > should show you the crypto device in the first and the RAID device in > the second scenario) and from /proc/mdstat showing /dev/mapper/a (or > /dev/dm-0) in the first and /dev/sdxy in the second case. > > Good luck with the research, > Heiko > > - -- > eMails verschlüsseln mit PGP - privacy is your right! > Mein PGP-Key zur Verifizierung: http://pgp.mit.edu > > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v1 > Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ > > iEYEARECAAYFAlM7LdQACgkQ/Vb5NagElAVK2gCgq7EVxGcc3sTlIgEF3M4oZH62 > LrQAn3kmHpBRcnjbWCbBsug5tQYKWS/s > =lSG+ > -----END PGP SIGNATURE----- > > _______________________________________________ > 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
