[WBEL-users] Software raid failures on bootup

[Erik Williamson]

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.

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.
> 

-- 
e r i k   w i l l i a m s o n                     erik@cpsc.ucalgary.ca
  system admin . department of computer science . university of calgary