Pulling (the correct) half of the HDDs would yield a degraded RAID10 array which is essentially the same disk layout as a RAID 0 array. Unfortunately I have no experience with RAID level migration using LVM to tell you the correct commands to do so in a supported manner. When converting from RAID1 to RAID0, I believe you'd typically use lvconvert with the -m0 option. For example, the following command would remove sdc from lvol1: lvconvert -m0 vg/lvol1 /dev/sdc Perhaps the command would be similar to break a RAID10 mirror(which is typically created using the -m1 option like a RAID1 array)? This RedHat page has some good info for RH7 LVM raid adminstration: https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/logical_volume_manager_administration/lv --Blake lejeczek wrote on 10/17/2017 7:31 AM: > hi guys, gals > > do you know if conversion from lvm's raid10 to raid0 is possible? > I'm fiddling with --splitmirrors but it gets me nowhere. > On "takeover" subject man pages says: "..between striped/raid0 and > raid10."" but no details, nowhere I could find documentation, nor a > howto. > > many thanks, L. > > _______________________________________________ > CentOS mailing list > CentOS at centos.org > https://lists.centos.org/mailman/listinfo/centos