dangerous situation with shutdown process

[Nicolas Rachinsky]

* Matthias Buelow <mkb at incubus.de> [2005-07-16 16:07 +0200]:
> Nicolas Rachinsky wrote:
> 
> >> >The track which is corrupted could contain data that wasn't written
> >> >to in months.  How would the journal help?
> >> 
> >> I don't understand this question.
> >
> >The track destroyed could contain sectors which are in no way related
> >to the sectors the OS is writing to.
> 
> And in what way is that related to the existence or nonexistence
> of write barriers and a journal?

You wrote before:
| If track corruption occurs after the journal is written, it doesn't
| matter, since at boot the journal will be replayed and all operations
| will be performed once more.

> If you pound the disk with a hammer, it will most likely break,
> no matter what strategy you're using.
> That you cannot eliminate _all_ sources of error with a strategy
> doesn't mean that you shouldn't implement it to minimize the number
> of errors that could happen.

I'm not argumenting for or against write barriesrs or a journal.

Nicolas