I am having trouble with an USB HDD whose Superblock has corrupted. The drive contains extremely inreplacable data so formatting/writing FileSystem again is out of question. Drive is formatted with UFS (GPT+Soft Updates).

The drive is mountable and readable but very slow. The drive is not mounted now tho to avoid loss of data.

What is your question? The drive is readable, so (slowly or otherwise) retrieve the data and put it somewhere safe.

If reading the driver is very slow, then there's a good chance the physical media is damaged in some way. Backup all the information on it ASAP. You should mount it read-only (-r) to minimize the possibility of further corruption.

"Howto repair the Superblock ?"

I can see the files but copying stops after few files.

A quick Google search brought up this, but I'm not certain it will work the same with your FS. You should try to make a copy of the disk image with dd first before attempting to recover the superblock.




This will supposedly copy an alternative superblock to the standard location:

UFS (GPT+Soft Updates) is FreeBSD's native FS, doesn't ? Odd that nobody knows howto fix it :S

Might be time to revisit your approach. When starting a thread it's usually a good idea to post a) what it is you're doing/trying to do; b) the error messages you're seeing (not your interpretation of them); and c) exactly what your question is.

This is silly. Is the data valuable? Or is the drive valuable? From your first post it sounds like the data is what you really care about. So take an image of it, as was already suggested.

If you're feeling like a gambler, you can run fsck against the drive (which will attempt to locate an alternate superblock).

Good luck.

fsck will locate an alternative superblock, but apparently the FreeBSD version of fsck no longer copies that superblock to the main one, so you have to run the dd command that I posted in order to perform that last step... at least, that was the information I collected via Google.