Filesystem corruption

[Volker Wysk]

Hi!

Zitat von Little Girl <littlergirl at gmail.com>:

> Hey there,
>
> Volker Wysk wrote:
>
>> I've brought my machine to the computer shop. They checked
>> everything, especially the PSU and the main board. All the
>> capacitors are okay. They couldn't find anything.
>
> That's really good news and must be reassuring to hear.

Except that the caus is still unclear.

>
>> Now I still don't know the reason of the data corruption, which
>> wrecked my Kubuntu system. I've installed a new Ubuntu-19.04, and
>> found no corruption so far. The problem can't be reproduced. This
>> includes my dm-cache, which I've set up anew.
>>
>> I'm worrying that the problem might hiddenly continue, and I don't
>> notice in time.  :-(  Good thing that I have multiple backups.
>
> I'd say that hard shut-downs are probably to blame. Somewhere in this
> thread you had mentioned that you've done that at times. Not shutting
> down a computer properly can corrupt a file system.

I haven't done any hard shut-downs since I've installed Ubuntu 19.04,  
but now the problem struck again - see the other message "Filesystem  
corruption - Problem strikes again".

> I don't know what the reason is for the non-standard shut-downs
> you've done, but if those are done when all else fails, you might
> want to consider adding the Alt+SysRq key combination to your
> repertoire:
>
> https://ubuntuforums.org/showthread.php?t=617349
>
> See also:
>
> https://en.wikipedia.org/wiki/Magic_SysRq_key
>
> I've used Alt+SysRq+R+E+I+S+U+B to reboot or Alt+SysRq+R+E+I+S+U+O to
> shut down on the very rare occasions when my system wouldn't
> respond.

I haven't had any bad trouble with hard shut-downs so far. You can  
still do alt-ctrl-delete. There was never anything this badly broken...

Bye!
V.W.