How to copy disk partitions from disk A to disk B

Is Solaris I use this command
prtvtoc /dev/rdsk/c0t0d0s2 | fmthard -s - /dev/rdsk/c0t1d0s2
to copy the partitions from one disk to a second.

I am trying to figure out how to do this on RHEL 3.0
I can get the info from disk A using fdisk -l

# fdisk -l /dev/sda

Disk /dev/sda: 36.7 GB, 36703934464 bytes
255 heads, 63 sectors/track, 4462 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot    Start       End    Blocks   Id  System
/dev/sda1   *         1        19    152586   83  Linux
/dev/sda2            20       401   3068415   83  Linux
/dev/sda3           402       656   2048287+  82  Linux swap
/dev/sda4           657      4462  30571695    f  Win95 Ext'd (LBA)
/dev/sda5           657      4462  30571663+  83  Linux

Now the qusetion is how do I partition the disk B with this info in a script?

TIA.
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