Re: Some raid1 questions

On Sunday February 1, yg@mind.lu wrote:

Hello,

I have my home partition on a raid1 device, and there is an ext3 
filesystem on it. Some more information:

...

Recently I had some freezes (due to nvidia...?), and everytime I had to 
make a hard reset.

Everytime then the raid resynced completely which took about 1.5 hours.
One time I lost some kde settings when this happened.
The filesystem did not complain about an unclean shutdown, it seems it 
did not see on bootup that the last shutdown was unclean.

Now to my questions:
Is this the normal behaviour?

Which behaviour?

  1.5 hour resync -- maybe. It depends on the speed and size of the
    drives.
  lost kde settings -- maybe. It depends on how well kde copes with
    sudden system failure.
  The filesystem didn't complain -- Yes.  ext3 doesn't complain about
    an unclean shutdown.  It just replays the journal and keeps
    working. 

Shouldn't the filesystem take care of that?

  Take care of what?  I suspect it did take care of everything it
  could. 

What is the point of having a journaling filesystem on a mirror?

  Lots.  A journaling filesystem guards against unclean shutdown.  A
  mirror guards against drive failure.  These are compliementary.

Is there anything I can change to have the filesystem handle unclean 
shutdowns?

 I think it did handle the unclean shutdown just fine.
 The loss of kde settings is probably dud to KDE note being careful
 enough when updating it's settings file.

NeilBrown

TIA,
Yves


-- 
Linux 2.4.24 #5 Mon Jan 5 19:38:06 CET 2004 i686
 14:25:55 up  4:14,  1 user,  load average: 0.43, 0.40, 0.32

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