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....
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.
Christopher Chan wrote:
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.
the update was a simple `yum update`
differently how? I expect to be striping two mirrors, all munged into one unit, without generating intermediate MD devices which has always seemed messy to me.
.
John R Pierce wrote:
Christopher Chan wrote:
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.
the update was a simple `yum update`
differently how? I expect to be striping two mirrors, all munged into one unit, without generating intermediate MD devices which has always seemed messy to me.
http://en.wikipedia.org/wiki/Non-standard_RAID_levels#Linux_MD_RAID_10
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Christopher Chan -
John R Pierce