dmraid failure/test cases [fc5-7]

[Sean Bruno]

On Wed, 2007-07-11 at 10:31 -0400, Peter Jones wrote:
> Sean Bruno wrote:
> > I spent some time trying to arm wrestle my machines fake raid
> > controllers(ck804, sil 3118) and a pci board I had lying around(adaptec
> > 1210sa), and came to the conclusion that dmraid was causing me serious
> > grief.
> > 
> > First off, I could _not_ get dmraid to go away during the install on
> > x86_64.  Even the nodmraid kernel option failed me.  Each time I booted
> > up with two disks connected to any controller, the only drive I had at
> > my disposal was /dev/mapper/mapper0.  I did notice that there was a
> > 'disable dmraid' toggle in the advanced setup button in the installer,
> > however this option was grayed out in all situations that I could come
> > up with.
> 
> You're sure that's "mapper0"?  That looks suspicious to me.  Asside from 
> lvm (which would typically say "VolGroupMM-LogVolNN" or similar), the 
> names we create for device mapper devices such as multipath and dmraid 
> are of the forms "mpathN" (for multipath) and "format_$METADATAINFO", 
> i.e. "sil_ahadejcacefa", where "sil" reflects that it's a SiL metadata 
> format and "ahadejcacefa" is a hash of information from the metadata 
> itself.  "mapper0" isn't something the installer would choose for a 
> device name.
> 
I just went back and retested, it is definitely "/dev/mapper/mpath0" as
you stated Peter.  I have no idea why I said mapper0 and why I repeated
it so frequently.

Anyway, what things can I test out for you folks?

Sean