John R Pierce wrote: > I just created a 4 drive mdadm --level=raid10 on a centos 4.8-ish system > here, and shortly thereafter remembreed I hadn't updated it in a while, > so i ran yum update... > > while installing/updating stuff, got these errors: > > Installing: kernel ####################### > [14/69] > raid level raid10 (in /proc/mdstat) not recognized > ... > Installing: kernel-smp ####################### > [19/69] > raid level raid10 (in /proc/mdstat) not recognized > > > is this a problem? the raid10 'seems' to work.... > If anaconda is doing the update here, I guess it is because anaconda in 4.x does not have raid10 personality support. The raid10 personality is NOT the same as nested raid1+0. It is an entirely new module from Neil Brown that has a poor choice of a name imho. It does things very differently from what you expect from a nested raid1+0 array.