On Tue, Oct 06, 2009 at 05:28:46PM +0000, Joseph L. Casale wrote: > Should I just pvcreate the raw /dev/md0 and not worry about creating an lvm > partition on it, or should/(can?) I? pvcreate is the first step of creating LVM areas. If you're not going to use LVM then you don't need to pvcreate. However I recommend that you _do_. Typically the steps are: mdadm to create the array (you've already done that) pvcreate the disk (/dev/md0) vgcreate a volume group, with /dev/md0 in it lvcreate the logical volumes inside the volume group eg pvcreate /dev/md0 vgcreate MyVolumeGroup /dev/md0 lvcreate -L 1T MyVolumeGroup MyLVol1 lvcreate -L 1T MyVolumeGroup MyLVol2 lvcreate -L 1T MyVolumeGroup MyLVol3 would create 3 1Terabyte logical volumes which could be accessed as /dev/MyVolumeGroup/MyLVol1 etc etc. They're what you could run mke2fs on and mount. (commands off the top of my head, so might be slightly wrong!) -- rgds Stephen