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.
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