On 4/27/2012 10:52 AM, aurfalien wrote: > Hi all, > > Please excuse the many posts. > > Wondering if any one can help me with the the setup. > > I have 2x2TBdisks. > I would like to mirror them. > I would like to create two LVMs so that I can snap shot from one to the other. > > During Centos 6 install, how would I go about this as its confusing? > > So far I am here; > > 1) Created the following raid devices; > md0 500MB (use it for /boot) > md1 4000MB (use it for swap) > md2 All remaining space (use it for /) > > 2) Created two physical LVMs, one on md0, the other on md1. > > 3) ? > This is were I am confused, do I create two LVM volume groups? > > I was thinking that my primary LVM can be ~1TB and that my other LVM which I snapshot to can also be ~1TB. > > Anyways, I am very green on this topic as I usually do hardware raids but I don't have that option. > > Thanks in advance, > - aurf > md0, your boot, cannot be a physical volum...so don't add things to it... md1 and md2 can be merged, make instead md1 with all remaining space. create a raid partition on each drive with 'remaining space' (making sure both are the same size) then create a physical volume raid device and select each drive that has the big raid partition then select create volume group... add /swap and '/' to as mount points, these will be volume groups. there is a drop down when adding a mount point that determines file type, one is 'swap' you only need one group.. the physical volume holds the logical group, which holds the logical volumes.