RAID Munging Question

[christoph at linuxsoup.com]

Gordon & I simulated a disk failure on a raid1 setup at the
last BLU meeting.  The system DID hang.  Perhaps there's a lengthy i/o
timeout which would eventually allow the system to keep running,
OR perhaps there are certain IDE features (DMA?) one could turn off to
improve the recovery. But "hang" it did!

But, the good news was that we did boot from the other disk.

Being able to boot from the alternate disk on the sencond IDE bus
needs to be supported by your bios.  Otherwise you still need to move
disks around before you can boot from the mirror.

- Christoph

Kent Borg wrote:
> On Fri, Apr 05, 2002 at 12:47:04PM -0500, Matthew J. Brodeur wrote:
> >    Note that the system will probably NOT keep running if one drive fails. 
>  
> > My experience has been that when an IDE drive goes down the system becomes 
> > very unhappy, but this may be different with newer hardware/kernels.  
> 
> In looking at a HOWTO and I forget what else, I read that things can
> keep running.  There seems to be the opinion that two RAID 1 disks
> should not be on the same IDE controller because some failure modes of
> a disk could bring down the controller