Allignment of ext3 partition on LVM RAID volume group
- by John P
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