[WBEL-users] Software raid failures on bootup

[Alex Tkachenko]

On Wed, 2004-08-18 at 13:33, Erik Williamson wrote:
> So, I made two linear arrays instead, and they worked on bootup. is 
> there a trick to doing a raid-10 ? I've had it working on the same 
> machine when it was running RedHat 7.3... now I'm wondering what I've 
> forgotten.
> 
Maybe you need to update initrd image to include appropriate raid
modules? These modules should be included automatically if you configure
raid arrays during install, but it looks like you have added these
manually later, so you might need to manually update initrd.img as well.

Take care,
Alex

> Thanks -
> Erik.
> 
> Erik Williamson wrote:
> > Hi All,
> > 
> > I've created a software raid consisting of 4 disks:
> > 
> > /dev/sdc & /dev/sdd are mirrored ( /dev/md0 )
> > /dev/sde & /dev/sdf are mirrored ( /dev/md1 )
> > 
> > /dev/md2 is a raid-0  of the above two.
> > 
> > This works well, I've formatted and used /dev/md0 - it does not contain 
> > any system files, etc - just mounted as /raid.  On bootup, it fails like 
> > this:
> > 
> > Starting up RAID devices: md0(skipped) md1(skipped) /dev/md2: Invalid
> >                                                                argument
> > /dev/md2 must be a nonpersistent RAID0 or LINEAR array!
> > 
> > Alas, it is a RAID0.  when I enter maintenance mode I can do the following:
> > 
> > raidstart /dev/md0
> > raidstart /dev/md1
> > raidstart /dev/md2
> > mount /dev/md2 /raid
> > 
> > and everything is fine.  so, in the meantime, I have simply added those 
> > lines to rc.local, with an fsck thrown in for good measure.
> > 
> > Can anyone tell me why this is?  I'm about to simplify the problem by 
> > making only two mirrored disks, but I'd prefer the above setup.
> > 
> > Thanks for any help!
> > Erik.
> >