[DRBD-user] 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 at aecom.yu.edu
Tue Sep 18 00:47:33 CEST 2007

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.

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

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