(addition to my last reply) Also what do you mean borken machine? My machine isn't broken, it's just that I DDd about 74M of /dev/urandom to rsd3i which is the primary disk for storage, the SSD (and when I say primary it's not the disk with the OS)
2nd thing is what do you mean by copy files, like I said the filesystem is unstable/corrupted a little(or something like that), and ddrescue doesn't seem to be capable of assisting here in this regard So I think that the main problem is how to extract files/fix the filesystem from that rsd3i image that I have backed up now? also is it safe to format the primary disk (ssd) now? as I said the size is different after I DDd to the HDD, it's much bigger than the corrupted image... and I don't think that I can do a hash-sum of the image, can I? WTF I think I can do a "sha512 /dev/rsd3i" xD cool I hope the raw device is what I needed, someone said that... but isn't the non-raw (aka sd3i) where the plain old files are? But I'm still confused as to why I can't view the rest of the sd3i, even though I overwrote only a little big... I don't know how FFS works or filesystems in general how they work, I know that boot drives need certain space for certain OSs, for example for MBR/GBT or whatever it's called, and stuff I knew more about this when I was excercising Arch Linux, but what you don't use you forget with time, I think On Wed, Jun 26, 2024 at 04:17:35PM +0000, Anon Loli wrote: > On Tue, Jun 25, 2024 at 03:05:08AM -0400, Steve Litt wrote: > > Anon Loli said on Mon, 24 Jun 2024 18:29:52 +0000 > > > > > > >I don't understand what's so complicated about DD, > > > > dd isn't complicated. ddrescue is even better. However, you mentioned > > you have a decrypted partition on your computer, and transferring that > > is better done with rsync than dd or ddrescue. > > > > >ssh/scp or > > > > DNS, routing, firewalling, all while you're under pressure. > > > > >encryption? > > > > Isn't encryption part of what got you into this situation in the first > > place? It's a massive complication when 99% of your priority is > > recovery. And why do you worry about data security on these USB disks > > (not sticks, disks) when they're only temporary? > > > > >I'll have to find my USB adapter, > > > > A new USB adapter will cost you what, forty bucks? What are your > > priorities here? How much do you value your data? > > > > >this is going too slow > > > > Not if it's USB3. I think 200GB would take less than an hour. > > > > >over the network, > > > > If your network is 1 Gbit, it makes no material difference. If it's > > 100Mbit, it's still not going to turn into a big problem. > > > > >that being said, I think that I mentioned the source > > >drive being over 200GB in size, so why mention USB sticks? lol > > > > LOL, I said USB disks, not sticks. > > > > https://www.newegg.com/model-wdbu6y0020bbk-wesn-2tb/p/1E8-0006-00101 > > > > Three of those cost you three less than $300, and each one holds ten > > times your 200GB of data. > > > > > > > >Encryption is a must, it's not just family photos, but even if it was, > > >I'm still not putting them on clear disk > > > > Well, if that's the hill you're willing to die on. > > > > Did I mention these intermediate disks are temporary, for the purpose > > of recovering you data, and they can be wiped later? Maybe this data > > isn't important enough to reduce the risk of mistakes in encryption? > > > > > > > >Now if you can't answer this that's fine, maybe someone else can.. if > > >I they can't then I'll cry > > >Question is: > > >if I write to the raw crypto volume (the decrypted disk), everything > > >should still be encrypted, right? > > > > Am I understanding that you want to write to the borked disk? Whatever > > the theory of it not hurting things (on a non-injured disk, of course), > > if you value your data I'd not touch the disk in question. > > > > >I don't understand exactly how under > > >the hood OpenBSD FDE works, > > > > Another excellent reason to make this thing as easy and simple as > > possible. > > > > but if I understand correctly, anything > > >written to the crypto volume gets encrypted and what-not, and then > > >stored to the drive encrypted, right? > > > > Whatever the answer is in theory, you're dealing with a disk injured in > > a way that's not describable on a mailing list > > > > > > > >I need to make a filesystem out of the backed-up copy if I understand > > >correctly, will it still work if 74M of it is overwritten? > > >Because then I could maybe DD over the raw(/non-raw?) crypto volume > > >and it should work? > > >Like what use is backing it up now and then making the filesystem on > > >the same drive and fucking up that entire drive? > > > > If you value your data, and please remember that unless you have > > your borked computer plugged into a known good uninterruptable power > > supply that can last longer than your longest power outages, you're > > one power outage away from losing your data forever, so time is of > > the essence. Here is the procedure I would personally use to get the > > whole thing done *today*: > > > > 1. Go to the store and buy two usb3 spinning rust disks between 1TB and > > 2TB. I'd also buy a 7200 RPM SATA drive to act as your final > > *encrypted* disk, or perhaps an SSD or NVMe of the same size. > > > > 2. Format and partition both of the USB disks. I highly suggest you not > > encrypt them, because mistakes happen and things go wrong. > > > > 3. Use rsync to copy the unencrypted part to a tree on one of the USB > > disks. Be sure to unmount it before unplugging it. Now at least you > > have that. > > > > 4. Use ddrescue to whole device copy the borked device to a file on the > > other spinning rust USB drive. Be sure to unmount it before > > unplugging it. > > > > 5. USB3 copy both those drives to the computer you intended to copy them > > to over the network. Be careful to copy the to the correct mount or > > loop mount, because you don't want to bork a second computer. > > > > 6. Back up the computer you just copied to. The backup can be > > encrypted. Just be careful to remember the decryption key and > > > > 6. Do whatever you can to rescue any data you haven't already rescued > > from the borked disk. > > > > 7. Power down the machine with the borked disk, remove the borked disk, > > and keep it for a year in case you need it. > > > > 8. Install your new SATA disk in the formerly borked machine, format > > and encrypt it (remember the key or password). > > > > 9. Copy your old data onto the newly installed, formatted and encrypted > > hard drive. > > > > 10. Wipe and reformat and encrypt your USB drive with the directory tree > > (not the drive image). > > > > 11. Rsync your new SATA drive's files and directories that USB drive, > > which becomes your backup preventing another disaster. > > > > 12. Take regular backups so this doesn't happen again. > > > > The preceding procedure should take you a few hours, especially given > > the fact that you have two computers so can be formatting and > > encrypting with one while backing up the other. > > > > SteveT > > > > Steve Litt > > > > http://444domains.com > > > > > Why can't I just have another drive(encrypted of course), and do > `dd if=/dev/rsd3i of=/mnt/hdd/brokenFSimage bs=1m` > > the /mnt/hdd is the mountpoint of the crypto volume of the secondary disk, and > then somehow reformat the sd2/3 (the SSD with the corrupted FS), and then copy > over the corrupted image backup from the HDD? > (I got the adapter now, over the network it'd take many days, not counting > broken pipes and what-not > > I didn't understand 100% of what you wrote, but if I understand correctly this > is the simpler version of what you recommended, yes? (no idea what ddrescue is > compared to dd) > In that case the worst problem then would be how to get a functioning > filesystem out of that image of the corrupted system? (assuming the raw disk > of > the crypto volume is the image of the filesystem, should be) > > Or you people keep on saying something like "do this and this and then > backup/save files and directories", but I can't do that if I can't read the > files directly, so how to do it indirectly? > I copied the image with the above command to the backup drive, what worries me > is the following size on respective disks: > primary disk (SSD with the corrupted crypto volume filesystem): used 220G > secondary disk (the backup HDD): used 239G > > Why is the size like 19G difference? Does it have something to do with me > DDing > over the 1st 74M of the primary disk? > By the way it might be my imagination, but I think that the primary USED size > was bigger like 24 hours ago (more than 220G), but I might just be seeing > things >
