Thanks Dennis. I think you pointed me in the right direction. The solution seems to have been to not worry about setting the partition ID to 8e (LVM). I used GNU parted to create one big 2.5TB partition of type GPT. I then just used the LVM commands to create the physical, virtual, and logical volumes which went without a hitch. Finally, I formatted the 2.5TB LVM partition with mkfs.ext3 which seems to have worked. Here's roughly what I did in case anyone needs a cheat sheet: # parted /dev/sdb (parted) mklabel gpt (parted) mkpart primary 0 2.5T (parted) quit # pvcreate /dev/sdb1 # vgcreate myvolume /dev/sdb1 # lvcreate -L 2.5TB myvolume # mkfs.ext3 /dev/mapper/myvolume-lvol0 Thanks again, Tom On 2/4/07, Dennis Gilmore <dennis at ausil.us> wrote: > Once upon a time Sunday 04 February 2007 10:04 pm, t m wrote: > > I want to create one large LVM volume on the 2.5TB device. I seem to be > > able to create an LVM physical volume on the whole device, but I've read > > that it's better to create a single large partition for LVM as the > > existence of the partition informs other apps that the disk is in use which > > prevents accidental corruption of the LVM volume. > > > Why is this so difficult? How should large partitions be created under > > Centos? > msdos disk labels are capable of supporting only 2tb so you need to use gpt > or split your disks up in 2tb chunks. parted will let you create what you > need as far as got labels goes . > > One big issue to note is that you can not boot from a disk labeled with gpt > labels. > > Dennis > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos >