[Linux-ha-dev] Re: Presentation

[Andy Poling]

On Sun, 17 Oct 1999, Alan Robertson wrote:
> CEINTEC i+d wrote:
> > I have been testing the Networked block device "nbd" with
> > raid 1/5 to make this, but I'm afraid to say that this is
> > a very dangerous solution, if a connection fails it
> > produces a file system corruption; I think this metod is
> > so dangerous than to share an scsi disk array with
> > two nodes, because a problem in the master node may
> > cause an important data corruption.What do you think?
> 
> I believe the reality is much better than this.
> I would recommend Raid 1, and a dedicated ethernet connection.  Then if you lose
> the connection, it's like losing a disk. RAID 1 can handle this.  

Also (and this is more of a linux-raid issue) I have seen discussion
recently on the linux-raid list indicating that, while software RAID 1/0
works, software RAID 1/5 may not currently work.  At least someone was
complaining of a similar problem with RAID 1/5, and they were using all
local disks.

So their problem may have had nothing to do with using NBD...

-Andy