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Re: ext4 FS Crash

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Hi,

Michael Stone wrote on 06/12/2024 14:49:
> On Fri, Dec 06, 2024 at 02:26:23PM +0100, Jörg-Volker Peetz wrote:
>> Should have been more clear. The drive should be idle for a longer time. This 
>> is assured by not mounting any partition of the SSD.
>> I was able to "repair" unreadable sectors on a built-in SSD of an HP-Probook 
>> laptop. As far as I remember I also deleted files which could not be read any 
>> more because of defective sectors and restored the files from backup. Such 
>> unreadable files can be found by performing, e.g., a checksum calculation of 
>> all files on the SSD. Then, leaving the SSD alone, it was able to "replace" 
>> the defective sectors by spare sectors.
> 
> Sorry, I don't buy that. Whatever happened, it wasn't the drive pondering 
> unreadable sectors and then regenerating them. I can believe that deleting 
> unreadable files and restoring them made them readable again. (Overwriting a bad 
> sector will cause the original block to be freed and potentially discarded; 
> after rewriting, the data is not in the same physical location it was before.) 

Yes, you are right. I also called 'fstrim -a' before restarting the computer 
into BIOS.

> As outlined in a previous post, trimming unused space may also let the drive 
> discard bad blocks. None of that requires the drive to be unmounted.
> 
May be that would have worked if I had waited long enough. But I did it by 
letting the computer stay in BIOS for a while.

As a check if the defective sectors are all mapped out I did read all sectors of 
the partitions:

   sudo dd if=/dev/sdaX of=/dev/null bs=8M status=progress

Regards,
Jörg.

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ext4 FS Crash Daniel Harris <mail.dharris@googlemail.com> - 2024-12-04 13:30 +0100
  Re: ext4 FS Crash Jochen Spieker <ml@well-adjusted.de> - 2024-12-04 13:50 +0100
  Re: ext4 FS Crash Eike Lantzsch ZP5CGE / KY4PZ <zp6cge@gmx.net> - 2024-12-04 15:40 +0100
    Re: ext4 FS Crash "Andrew M.A. Cater" <amacater@einval.com> - 2024-12-04 19:20 +0100
  Re: ext4 FS Crash "Alexander V. Makartsev" <avbetev@gmail.com> - 2024-12-04 17:30 +0100
  Re: ext4 FS Crash Klaus Singvogel <deb-user-ml@singvogel.net> - 2024-12-04 17:50 +0100
    Re: ext4 FS Crash Daniel Harris <mail.dharris@googlemail.com> - 2024-12-04 18:20 +0100
      Re: ext4 FS Crash Michael Stone <mstone@debian.org> - 2024-12-05 00:50 +0100
        Re: ext4 FS Crash Daniel Harris <mail.dharris@googlemail.com> - 2024-12-05 12:00 +0100
          Re: ext4 FS Crash Michael Stone <mstone@debian.org> - 2024-12-05 13:40 +0100
            Re: ext4 FS Crash Daniel Harris <mail.dharris@googlemail.com> - 2024-12-05 16:40 +0100
      Re: ext4 FS Crash Jörg-Volker Peetz <jvpeetz@web.de> - 2024-12-05 10:30 +0100
        Re: ext4 FS Crash Max Nikulin <manikulin@gmail.com> - 2024-12-05 16:30 +0100
          Re: ext4 FS Crash Erwan David <erwan@rail.eu.org> - 2024-12-05 16:40 +0100
            Re: ext4 FS Crash Andy Smith <andy@strugglers.net> - 2024-12-05 17:10 +0100
            Re: ext4 FS Crash gene heskett <gheskett@shentel.net> - 2024-12-06 02:00 +0100
          Re: ext4 FS Crash Michael Stone <mstone@debian.org> - 2024-12-05 18:50 +0100
            Re: ext4 FS Crash Jörg-Volker Peetz <jvpeetz@web.de> - 2024-12-06 14:30 +0100
              Re: ext4 FS Crash Michael Stone <mstone@debian.org> - 2024-12-06 15:00 +0100
                Re: ext4 FS Crash Jörg-Volker Peetz <jvpeetz@web.de> - 2024-12-06 15:10 +0100
                Re: ext4 FS Crash Max Nikulin <manikulin@gmail.com> - 2024-12-06 17:00 +0100
                Re: ext4 FS Crash Michael Stone <mstone@debian.org> - 2024-12-06 17:40 +0100
                Re: ext4 FS Crash Max Nikulin <manikulin@gmail.com> - 2024-12-08 17:30 +0100
                Re: ext4 FS Crash Michael Stone <mstone@debian.org> - 2024-12-08 18:20 +0100
                Re: ext4 FS Crash Max Nikulin <manikulin@gmail.com> - 2024-12-10 04:50 +0100
                Re: ext4 FS Crash Daniel Harris <mail.dharris@googlemail.com> - 2025-01-13 16:30 +0100
    Re: ext4 FS Crash Jeffrey Walton <noloader@gmail.com> - 2024-12-04 22:00 +0100
      Re: ext4 FS Crash Klaus Singvogel <deb-user-ml@singvogel.net> - 2024-12-05 08:30 +0100
        Re: ext4 FS Crash gene heskett <gheskett@shentel.net> - 2024-12-05 11:10 +0100
          Re: ext4 FS Crash Klaus Singvogel <deb-user-ml@singvogel.net> - 2024-12-05 13:10 +0100
            Re: ext4 FS Crash gene heskett <gheskett@shentel.net> - 2024-12-05 13:40 +0100
              Re: ext4 FS Crash Michael Stone <mstone@debian.org> - 2024-12-05 14:00 +0100
              Re: ext4 FS Crash Klaus Singvogel <deb-user-ml@singvogel.net> - 2024-12-05 15:00 +0100
                Re: ext4 FS Crash gene heskett <gheskett@shentel.net> - 2024-12-05 22:30 +0100
  Re: ext4 FS Crash Jeffrey Walton <noloader@gmail.com> - 2024-12-04 18:20 +0100

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