On Sat, Jun 03, 2006 at 07:14:51PM -0400, T. Bryan wrote: > I put this project on the back shelf for a bit. Now that I'm ready for it, I > invoke the Necromancer to resurrect this thread...
I consider it resurrected ... and so we continue. > On Monday 01 May 2006 11:47 am, Rick DeNatale wrote: > > > 1) Partition /dev/sdb like /dev/sda > > In this step, what did you do? Say that I use fdisk to create a whole-disk > partition on my drive /dev/hde. What partition type should I set? Do I need > to create a filesystem on it (with mkfs.ext3, for example), or is all of that > somehow taken care of by lvm? In order: 0 -- Presuming you decide to use the whole disk route: 1 -- Partition type is: "LVM" 2 -- No, you are premature. LVM creates, in effect, the "disk device" itself. Later on, you will format the "partition" that you create. > > 2) Create the raid array with a missing drive > > $mdadm --create /dev/md0 --level 1 --raid-devices=2 missing /dev/sdb5 > > > > 3) Create a PV on the raid array > > $pvcreate /dev/md0 > > > > 4) create a VG > > $vgcreate MainVG /dev/md0 > > Right...so, what was /dev/sdb5? Was it an unformatted partition? Or did you > first format it as an ext2 or ext3 filesystem? Here, Rick is combining two different technologies, that may confuse you. The first, which is RAID ( type 1 -- Mirroring ) is what he used sdb5 for. Then he used LVM on top of that RAID device to create, first, a Physical Volume, and then a Volume Group ( VG ). Yes it was unformatted, or if it wasn't he is in trouble! Finally, what he did, and you didn't show, was create a Logical Volume, the equivalent of the old fdisk partition ( what we used to use to make a space for a file system ), which he sized appropriately and then formatted as he wished ( ext2 or ext3 or reiser or ... ). That can then be mounted and used as you wish. > Thanks, > ---Tom Any time, Brian
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