Just a small shell file I had to write for my OS class that goes through the first 4 disks on a linux system and prints out the number of partitions they have.

disks.sh

#!/bin/bash
echo "The following hard disks are currently present in your system:"

for DISK in /dev/sda  /dev/sdb /dev/sdc /dev/sdd
do
  echo "The disk $DISK appears to have `fdisk -l $DISK 2> /dev/null | grep -E $DISK\[0-9]\ | wc -l` partitions."
done