Re: Could drbd randomly flip bits? Was: Database page corruption on disk occurring during mysqldump on a fresh database and Was: Spontaneous development of supremely large files on different ext3 filesystems

[Maurice Volaski <mvolaski aecom yu edu>]

I guess I will watch it closely for now and if it trips up again 
failover to the drbd peer and see what happens there. I suppose I 
could even deattach the local disks and have it run using the peer 
over the wire. That should eliminate the local I/O subsystem.


> > It's kind of scary there is no end-to-end parity implemented 
> > somewhere along the whole data path to prevent this. It sort of 
> > defeats the point of RAID 6 and ECC.
>
> I agree, it's pretty damn scary.  You can read about the story and 
> the ensuing discussion here:

I wonder if drbd could help out with that.


> Interesting.  I hadn't heard of such a thing until I just looked it 
> up.  But in any case that adds yet another variable (and a fairly 
> uncommon one) to the mix.

It's this one: http://www.acnc.com/02_01_jetstor_sata_416s.html. I 
thought units like it are very popular.
--

Maurice Volaski, mvolaski aecom yu edu
Computing Support, Rose F. Kennedy Center
Albert Einstein College of Medicine of Yeshiva University