Messages in this thread | | | Date | Wed, 09 Jan 2002 11:24:20 +0100 | From | Helge Hafting <> | Subject | Re: fs corruption recovery? |
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Richard Gooch wrote: > > Andreas Dilger writes: [...] > > Is the data really that valuable, and you don't have a backup? It may > > cost you several thousand dollars to do a recovery from such a company. > > Yet, it isn't worth doing backups, it appears. > > And these companies don't really do much that you can't do yourself. I > had a failing drive some years ago, where some sectors couldn't be > read. So I tried to dd the raw device to a file elsewhere. Of course, > dd will quit when it has an I/O error. So I wrote a recovery utility > that writes a zero sector if reading the input sector gives an I/O > error. Unfortunately, I couldn't mount the file (too much corruption), > but I was able to use debugfs on it. I got the most important data > back. > > While I was waiting for 48 hours for the data to be pulled off (each > time a bad sector was encountered, the drive would retry several > times, with lots of clicking and rattling), I contacted one of these > recovery companies. I wanted to know if they could recover the bad > sectors. I was told no. After some probing, it turns out that all they > do is basically what I was doing. They just charge $2000 for it. > > No doubt if you took your drive to your local CIA/KGB/MI6 offices, > they could recover some of those bad sectors. But I hear they charge > their customers quite a lot...
No need for CIA/KGB. There are companies that do more than this. If necessary, they disassemble the drive in a clean room and use their own reading equipment. This allows recovery from fried drive electronics and broken motors/heads. And sometimes (partial) recovery from scratches and other bad sectors.
If you really need this, consider http://www.ibasuk.com/technology/patan.htm
Helge Hafting - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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