Gentoo Archives: gentoo-user

From: felix@×××××××.com
To: gentoo-user@l.g.o
Subject: [gentoo-user] LVM, crypto, and backup
Date: Sun, 16 Dec 2007 19:58:13
1 I want to set up two portable 1TB drives so users have their own LVM
2 partitions to mount as crypto drives. These partitions would have to
3 be mounted manually with the passpharse supplied by each user (this is
4 a family setup, just a few users). But I want the system to be able
5 to backup one 1TB drive to the other for offline backup.
7 1. What crypto system to use?
9 2. I have planned this with each user having their own LVM partition,
10 but would it be possible to use one passphrase and make the entire
11 drive crypto, then run LVM on top of that? This is a curiousity
12 question more than anything. It might be handy for a system disk
13 someday, but not now.
15 3. What is the right way to backup one 1TB drive to the other? dd
16 would probably work, but that sounds rather crude, not to mention
17 it would have to copy the entire 1TB over USB. It would be a lot
18 faster to only backup what is needed. I want to backup partitions
19 automatically once a week, without knowing the passphrase or
20 requiring the partitions to be mounted. If each LVM partition is
21 only expanded as necessary, unused space in each partition would
22 be kept to a minimum. Or is it possible for the backup to only
23 backup as much of each partition as is used, without knowing the
24 passphrase or having it mounted? I suspect not, but I don't know.
26 --
27 ... _._. ._ ._. . _._. ._. ___ .__ ._. . .__. ._ .. ._.
28 Felix Finch: scarecrow repairman & rocket surgeon / felix@×××××××.com
29 GPG = E987 4493 C860 246C 3B1E 6477 7838 76E9 182E 8151 ITAR license #4933
30 I've found a solution to Fermat's Last Theorem but I see I've run out of room o
31 --
32 gentoo-user@g.o mailing list


Subject Author
Re: [gentoo-user] LVM, crypto, and backup Albert Hopkins <marduk@×××××××××××.org>