uncleflo
Registered since September 28th, 2017
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Tag selected: ext4.
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filesystems - recovering ext4 partition after dd'ing over start of HD - Unix & Linux Stack Exchange
Saved by uncleflo on August 9th, 2014.
I accidentally used dd and wrote over the first 208MB of my external disk. What I wrote over is a partition on its own (Debian nestinstaller) so what I see now is not my old (now damaged) ext4 partition but another smaller partition. This limits the tools and advices I could follow. My plan was to recreate the partition table with testdisk and then fix everything with the backup superblocks as described here. I'd lose the first 208MB but that's ok compared to the other 300GB of data in there. Something like the following:
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How to recover ext4 from GPT partitioned disk - Information Technology
Saved by uncleflo on August 9th, 2014.
Hard drive sizes had increased dramatically in last several years, but block device drivers are still outdated. For hard drives more than 1TB currently seems to be an advantage to use GPT instead of legacy MBR partition table. You can see more details at http://en.wikipedia.org/wiki/GUID_Partition_Table. One of the inevitable disadvantage of GPT is the possibility of corruption by using outdated partition editor like cfdisk, or other disk tools, even without any intention to modify the partition. It happened recently on one 1.5TB WD Caviar Green with GPT and one ext4 partition full of data.
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HOWTO: Repair a broken Ext4 Superblock in Ubuntu « Linux Expresso
Saved by uncleflo on August 9th, 2014.
This has happened to me a few times, and it’s not a nice problem to find yourself in. You computer won’t boot, all your filesystem checks tell you you’ve a bad superblock, but you cant seem to find how to fix it. Well, here goes :) This guide is for ext4 , though I’ll explain how other filesystems can be cured along the way. The easiest way to carry all this out, seeing as your computer probably won’t boot at this stage, is to download and burn a copy of Parted Magic. Boot from that, and you’ll access to a number of useful tools.
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Recovering files from ext4 partition | BuildCube Tech Blog
Saved by uncleflo on August 9th, 2014.
Update, although extundelete restrored most of my files, some files could only be restored with no file name through an application that is installed with testdisk called photorec So, i added a directory to eclypse, a message apears, i hit enter axcidentally, all the files in the web directory are lost, no backup, years of programming…
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extundelete: An ext3 and ext4 file undeletion utility
Saved by uncleflo on August 9th, 2014.
extundelete is a utility that can recover deleted files from an ext3 or ext4 partition. The ext3 and ext4 file systems are the most common default file systems in Linux distributions like Mint, Mageia, or Ubuntu. extundelete uses information stored in the partition's journal to attempt to recover a file that has been deleted from the partition. There is no guarantee that any particular file will be able to be undeleted, so always try to have a good backup system in place, or at least put one in place after recovering your files!
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Repairing Linux ext2 or ext3 file system
Saved by uncleflo on August 9th, 2014.
Linux comes with the system utility fsck ("file system check") for checking the consistency of a file system. This quick post explains how to use fsck to fix error. by NIX Craft on October 16, 2005 · 21 comments· LAST UPDATED April 10, 2012 in Data recovery, Debian Linux, Gentoo Linux
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