ext4 inode-table recovery
ext4 inodes store file type, permissions, timestamps, size, block mappings, and other metadata. If inode-table blocks are unreadable or overwritten, file names may point to invalid records or large areas can appear deleted.
Understand the symptom
Recovery correlates superblock and group-descriptor copies, inode bitmaps, inode-table ranges, directory entries, extents, journal records, and file signatures. Mounting ext4 read-only can still replay the journal unless noload is used, so source preservation must happen below the mount layer.
What you may see
e2fsck reports an inode with invalid mode, size, extent, or block references.
Directory records point to inodes that cannot be read or validated.
Repair reconnects orphaned inodes without their original paths.
Unreadable sectors overlap one or more inode-table blocks.
Protect the source
The kernel may replay ext4 transactions even when mounted ro unless noload prevents it.
Consistency may be restored by deleting references and losing names or file mappings.
They can restore layout information but not recreate overwritten inode-table contents.
Do this now
Stop services, boot attempts, journal replay, fsck automation, and all writes.
Record partition, LVM, mdraid, encryption, mount, UUID, and kernel-error details.
Acquire the device or every array member before e2fsck or recovery scans.
Keep e2fsck -n results, superblock locations, failing inode numbers, and bad-sector addresses.
NEPFOSYS process
NEPFOSYS maps block groups, descriptor copies, inode tables, bitmaps, journal, and directory trees.
Surviving records are matched to names, block mappings, signatures, and journal evidence on the image.
Recovered files are checked for size and content, with reconstructed paths distinguished from signature-only output.
A clear next step
Start a case with the exact symptoms, incident timeline, prior attempts, encryption details, and the files that matter most. NEPFOSYS will route the case to the appropriate DFW intake or nationwide mail-in path.
Start with a case reviewQuestions, answered
No. It may restore filesystem geometry, but it does not contain copies of every inode table.
Not automatically. ext4 can replay its journal on a ro mount; preserve the device first and use nonwriting methods on a copy.
Repair found inodes without a reliable directory path and reconnected them under generated names.
DFW local · Nationwide mail-in