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Groups > comp.os.linux.misc > #15052
| From | "Charles T. Smith" <cts.private.yahoo@gmail.com> |
|---|---|
| Newsgroups | comp.os.linux.misc |
| Subject | Re: Recovering an EXT3 FS - hopeless if inode list is overwritten? |
| Date | 2015-07-14 07:55 +0000 |
| Organization | A noiseless patient Spider |
| Message-ID | <mo2f8v$g2e$1@dont-email.me> (permalink) |
| References | <mjmo0k$a0i$1@dont-email.me> <AABVXuscNOAAAAl7.A1.flnews@WStation3.stz-e.de> <mnto2i$cc2$1@dont-email.me> <AABVo53Dk5oAAA1l.A1.flnews@WStation3.stz-e.de> <mo17hn$kcv$1@dont-email.me> |
A couple of notes to this superblock dump: - the mtime/wtime values represent 2014/11/11 12:48:56 Definitely plausible - the two arrays are not properly implemented by the dump program (s_hash_seed and s_reserved). On Mon, 13 Jul 2015 20:37:12 +0000, Charles T. Smith wrote: > $ sudo dd if=/dev/sdc1 bs=512 count=1 skip=206983138 | > ../../bin/blkdump > 78000: s_inodes_count; /* Inodes count */ > 1dff00: s_blocks_count; /* Blocks count */ > 17ff3: s_r_blocks_count; /* Reserved blocks count */ > f7099: s_free_blocks_count; /* Free blocks count */ > 4c3da: s_free_inodes_count; /* Free inodes count */ > 0: s_first_data_block; /* First Data Block */ > 2: s_log_block_size; /* Block size */ > 2: s_log_frag_size; /* Fragment size */ > 8000: s_blocks_per_group; /* # Blocks per group */ > 8000: s_frags_per_group; /* # Fragments per group */ > 2000: s_inodes_per_group; /* # Inodes per group */ > 5461f7a8: s_mtime; /* Mount time */ > 5461f7a8: s_wtime; /* Write time */ > 3: s_mnt_count; /* Mount count */ > ffff: s_max_mnt_count; /* Maximal mount count */ > ef53: s_magic; /* Magic signature */ > 1: s_state; /* File system state */ > 1: s_errors; /* Behaviour when detecting... > 0: s_minor_rev_level; /* minor revision level */ > 5461e8b0: s_lastcheck; /* time of last check */ > 0: s_checkinterval; /* max. time between checks */ > 0: s_creator_os; /* OS */ > 1: s_rev_level /* Revision level */ > 0: s_def_resuid; /* Default uid for reserved... > 0: s_def_resgid; /* Default gid for reserved... > b: s_first_ino; /* First non-reserved inode */ > 100: s_inode_size; /* size of inode structure */ > 0: s_block_group_nr; /* block group # of this sb */ > 3c: s_feature_compat; /* compatible feature set */ > 242: s_feature_incompat; /* incompatible feature set */ > 7b: s_feature_ro_compat; /* readonly-compatible fea... > 0: s_algorithm_usage_bitmap; /* For compression */ > 0: s_prealloc_blocks; /* Nr of blocks to try to ... > 0: s_prealloc_dir_blocks; /* Nr to preallocate for ... > df010000: s_padding1; > 8000000: s_journal_inum; /* inode number of journal ... > 0: s_journal_dev; /* device number of journal... > 0: s_last_orphan; /* start of list of inodes ... > f806edbf: s_hash_seed[4]; /* HTREE hash seed */ > 1: s_def_hash_version; /* Default hash version to ... > 1: s_reserved_char_pad; > 0: s_reserved_word_pad; > c: s_default_mount_opts; > 0: s_first_meta_bg; /* First metablock block gr... > 1407edbf: s_reserved[190]; /* Padding to the end of ... > > 1+0 records in > 1+0 records out > 512 bytes (512 B) copied, 0.000568372 s, 901 kB/s > > In conclusion, I have 1837 superblocks - they are all essentially > identical - and unequal to the surrounding blocks, but they're at an > offset that I can't pass to any of the e2 programs. > > That's why it occurred to me that there must be some other similar > structures laying around, e.g. the Group Descriptor Tables to help me > get oriented. > > I also tried this: > > $ sudo dumpe2fs -o superblock=$((206983138/2)) -o blocksize=1024 > /dev/sdc1 dumpe2fs 1.41.11 (14-Mar-2010) > dumpe2fs: Filesystem has unexpected block size while trying to open > /dev/ sdc1 > Couldn't find valid filesystem superblock. > > Thanks for your interest! > cts
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Recovering an EXT3 FS - hopeless if inode list is overwritten? "Charles T. Smith" <cts.private.yahoo@gmail.com> - 2015-05-22 08:05 +0000
Re: Recovering an EXT3 FS - hopeless if inode list is overwritten? Tim Watts <tw_usenet@dionic.net> - 2015-05-22 09:24 +0100
Re: Recovering an EXT3 FS - hopeless if inode list is overwritten? Michael Baeuerle <michael.baeuerle@stz-e.de> - 2015-05-22 08:38 +0000
Re: Recovering an EXT3 FS - hopeless if inode list is overwritten? "Charles T. Smith" <cts.private.yahoo@gmail.com> - 2015-05-22 09:58 +0000
Re: Recovering an EXT3 FS - hopeless if inode list is overwritten? "Charles T. Smith" <cts.private.yahoo@gmail.com> - 2015-07-12 12:54 +0000
Re: Recovering an EXT3 FS - hopeless if inode list is overwritten? "David W. Hodgins" <dwhodgins@nomail.afraid.org> - 2015-07-12 12:47 -0400
Re: Recovering an EXT3 FS - hopeless if inode list is overwritten? "Charles T. Smith" <cts.private.yahoo@gmail.com> - 2015-07-13 07:40 +0000
Re: Recovering an EXT3 FS - hopeless if inode list is overwritten? "David W. Hodgins" <dwhodgins@nomail.afraid.org> - 2015-07-13 14:30 -0400
Re: Recovering an EXT3 FS - hopeless if inode list is overwritten? Michael Baeuerle <michael.baeuerle@stz-e.de> - 2015-07-13 11:41 +0000
Re: Recovering an EXT3 FS - hopeless if inode list is overwritten? "Charles T. Smith" <cts.private.yahoo@gmail.com> - 2015-07-13 20:37 +0000
Re: Recovering an EXT3 FS - hopeless if inode list is overwritten? "Charles T. Smith" <cts.private.yahoo@gmail.com> - 2015-07-14 07:55 +0000
Re: Recovering an EXT3 FS - hopeless if inode list is overwritten? Michael Baeuerle <michael.baeuerle@stz-e.de> - 2015-07-14 14:35 +0000
Re: Recovering an EXT3 FS - hopeless if inode list is overwritten? "Charles T. Smith" <cts.private.yahoo@gmail.com> - 2015-07-14 15:20 +0000
Re: Recovering an EXT3 FS - hopeless if inode list is overwritten? Vilmos Soti <vilmos@soti.ca> - 2015-05-22 10:53 -0700
Re: Recovering an EXT3 FS - hopeless if inode list is overwritten? "Charles T. Smith" <cts.private.yahoo@gmail.com> - 2015-05-23 08:25 +0000
Re: Recovering an EXT3 FS - hopeless if inode list is overwritten? Unknown <dog@gmail.com> - 2015-05-25 06:40 +0000
Re: Recovering an EXT3 FS - hopeless if inode list is overwritten? lakshmi <lakshmipathi.g@gmail.com> - 2015-05-25 22:06 -0700
Re: Recovering an EXT3 FS - hopeless if inode list is overwritten? Jean-David Beyer <jeandavid8@verizon.net> - 2015-05-26 09:57 -0400
Re: Recovering an EXT3 FS - hopeless if inode list is overwritten? Robert Riches <spamtrap42@jacob21819.net> - 2015-05-27 02:58 +0000
Re: Recovering an EXT3 FS - hopeless if inode list is overwritten? "Charles T. Smith" <cts.private.yahoo@gmail.com> - 2015-06-04 06:17 +0000
Re: Recovering an EXT3 FS - hopeless if inode list is overwritten? Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2015-06-04 18:44 +0000
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