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# sfdisk -d /dev/sdb | sfdisk /dev/sda
Checking that no-one is using this disk right now ...
OK

Disk /dev/sda: 243201 cylinders, 255 heads, 63 sectors/track
Old situation:
Units = cylinders of 8225280 bytes, blocks of 1024 bytes, counting from 0

   Device Boot Start     End   #cyls    #blocks   Id  System
/dev/sda1          0       -       0          0    0  Empty
/dev/sda2          0       -       0          0    0  Empty
/dev/sda3          0       -       0          0    0  Empty
/dev/sda4          0       -       0          0    0  Empty
New situation:
Units = sectors of 512 bytes, counting from 0

   Device Boot    Start       End   #sectors  Id  System
/dev/sda1   *      2048    464127     462080  fd  Linux raid autodetect
/dev/sda2        464128 2930265855 2929801728  fd  Linux raid autodetect
/dev/sda3             0         -          0   0  Empty
/dev/sda4             0         -          0   0  Empty
Warning: partition 1 does not end at a cylinder boundary

sfdisk: I don't like these partitions - nothing changed.
(If you really want this, use the --force option.

# fdisk -lu /dev/sdb

Disk /dev/sdb: 1500.3 GB, 1500301910016 bytes
224 heads, 56 sectors/track, 233599 cylinders, total 2930277168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0x00000000

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1   *        2048      464127      231040   fd  Linux raid autodetect
/dev/sdb2          464128  2930265855  1464900864   fd  Linux raid autodetect