linux - Allignment of ext3 partition on LVM RAID volume group

I'm trying to add a partition on a LVM that resides on a RAID6 volume group and fdisk is complaining about the partition not residing on a physical sector boundry.

My question is, how do you calculate the correct starting sector for a partition on a LVM? This partition will be formated ext3. Would it be better to just format the LVM directly instead of creating a new partition?

Disk /dev/dedvol/backup: 2199.0 GB, 2199023255552 bytes
255 heads, 63 sectors/track, 267349 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 1048576 bytes / 8388608 bytes
Disk identifier: 0x4e428f49

                     Device Boot      Start         End      Blocks   Id  System
/dev/dedvol/backup1              63      267349  2146982827+  83  Linux
Partition 1 does not start on physical sector boundary.

lvdisplay /dev/dedvol/backup 
  --- Logical volume ---
  LV Name                /dev/dedvol/backup
  VG Name                dedvol
  LV UUID                OV2n5j-7LHb-exJL-t8dI-dU8A-2vxf-uIicCt
  LV Write Access        read/write
  LV Status              available

  # open                 0
  LV Size                2.00 TiB
  Current LE             524288
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     32768
  Block device           253:1

vgdisplay dedvol
  --- Volume group ---
  VG Name               dedvol
  System ID             
  Format                lvm2
  Metadata Areas        1
  Metadata Sequence No  3
  VG Access             read/write
  VG Status             resizable

  MAX LV                0
  Cur LV                2
  Open LV               1
  Max PV                0
  Cur PV                1
  Act PV                1
  VG Size               14.55 TiB
  PE Size               4.00 MiB
  Total PE              3815448
  Alloc PE / Size       3670016 / 14.00 TiB

  Free  PE / Size       145432 / 568.09 GiB
  VG UUID               8fBcOk-aXGx-P3Qy-VVpJ-0zK1-fQgy-Cb691J