First create a single partition (probably
n to create a new partition,
then select the defaults that span
the whole disk.
t to select the partition
fd - this selects the type "Linux LVM".
Then on to configure LVM:
pvcreate /dev/cciss/c0d1p0 # creates the physical volume - akin to formatting
vgcreate vgname /dev/cciss/c0d1p0 # creates the 'vgname' volume group
lvcreate -L 7000G -n lv1 vgname # creates the first logical volume
lvcreate -L 7000G -n lv2 vgname # creates the second logical volume
mkfs.xfs /dev/vgname/lv1 # creates the first fileystem
mkfs.xfs /dev/vgname/lv2 # creates the second filesystem
You can also create the physical volume directly on top of the raw disk; in that case use
c0d1 instead of
c1d1p0. It's probably better to partition it first, though, if possible.
If you want to skip LVM you can also just use fdisk to create two partitions (use +7000G when queried about the limit to only span the first half of the disk with the first partition) and create the filesystems on top of them:
mkfs.xfs /dev/cciss/c0d1p0 # creates the first fileystem
mkfs.xfs /dev/cciss/c0d1p1 # creates the second filesystem
Of course you'll lose the LVM flexibility.