如何从正常工作硬盘恢复半损坏数据？1TB Linux硬盘故障咨询

Hey there, sorry to hear about your drive mishap—mid-copy interruptions from power or cable issues are the worst, and it’s frustrating to see partially corrupted data afterward. Let’s walk through actionable steps to recover your files, starting with the most critical rule to avoid making things worse.

Any new writes to the affected drive could overwrite damaged file system metadata or partially copied data, making recovery impossible. Don’t save anything to it, don’t run unnecessary processes on it—just leave it mounted read-only if possible, or unmount it right away with sudo umount /dev/sdXn (replace sdXn with your drive’s partition identifier, like sdb1).

Before diving into file system repairs, confirm the drive itself isn’t failing. Use SMART tools to check its health:

sudo smartctl -a /dev/sdX

Look for entries like Reallocated_Sector_Ct or Current_Pending_Sector—if these numbers are non-zero, the drive might have physical damage, and you’ll want to prioritize recovering data as fast as possible before it gets worse.

Most Linux file systems have built-in repair tools. Pick the one matching your drive’s filesystem (ext4, XFS, etc.):

For ext4 File Systems #

First unmount the partition (if it’s mounted), then run:

sudo fsck.ext4 -p /dev/sdXn

The -p flag tells fsck to automatically fix safe, non-destructive issues. If it asks for manual intervention, follow the prompts—usually answering y to fix most errors is safe, but be cautious if it asks to delete inodes.

For XFS File Systems #

XFS requires the partition to be unmounted first. Run:

sudo umount /dev/sdXn
sudo xfs_repair /dev/sdXn

XFS Repair is good at fixing metadata corruption, which is likely what’s causing your folder content to be unreadable.

If file system repair didn’t fix everything, use specialized recovery tools:

For the Corrupted In-Progress Copy Folder #

This folder’s metadata is probably messed up because the copy was cut off mid-way. Try these tools:

• TestDisk: A powerful tool that can recover lost partitions and fix file system structures. Install it first:

  # Debian/Ubuntu
  sudo apt install testdisk
  # Fedora/RHEL
  sudo dnf install testdisk
  

  Run testdisk, select your drive, choose the correct partition table type (usually Intel/PC), then go to Advanced > [Your Partition] > List. You should see the corrupted folder’s files here—select them and copy them to a separate, healthy drive.
• PhotoRec: Part of the TestDisk suite, it’s great for recovering individual files even when folder structures are destroyed. Run photorec, select your drive, choose the partition, pick the file types you want to recover, and set a destination folder on a different drive. It will scan and extract any recoverable files.

For Existing Folders with Unreadable Content #

If the folder structure is intact but files won’t open, this is likely inode or metadata corruption:

• Use rsync to force-copy the files to a safe location, skipping errors:

  sudo rsync -av --ignore-errors /path/to/your/folder /path/to/safe/destination
  

  This often pulls out usable data even if the original files show as corrupted.
• For ext4, use debugfs to inspect and recover inodes:

  sudo debugfs -R 'ls -l /path/to/corrupted/folder' /dev/sdXn
  

  This will list the inodes for the files in the folder. If you see valid inodes, you can try to link them back with debugfs commands, but this is more advanced—stick to TestDisk/PhotoRec if you’re not comfortable with low-level file system tools.

Once you’ve recovered files, don’t skip this step! Open documents, play videos, check images to make sure they’re intact. If you had md5/sha checksums for your original data, compare them to confirm the recovered files are identical:

md5sum /path/to/recovered/file /path/to/original/file

If none of these steps fully recover your data, professional data recovery services are an option, but they’re expensive. For most logical corruption cases (like your scenario), the tools above should get you most of your files back.

内容的提问来源于stack exchange，提问作者Madhav Nikam