Format HD to ext3

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//Creating a partition

# fdisk –l //Show hdd connected
# fdisk /dev/hdb
# p
# n // Create a new partition
# p // Create a primary partition
# 1
# p // print the new partition table
# w


//Formating filesystem
# mkfs.ext3 –L /<label> /dev/hdb1
e.g
# mkfs.ext3 -b4096 -L pdr /dev/sda2

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To format thumb drive:
fdisk /dev/sdXX
p
d
n
t
83
w

mkfs.ext2 /dev/sdXX
e2fsck -f -y /dev/sdXX //To check the file system

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NOTE!!!
When using fdisk, use fdisk /dev/sdb and not /dev/sdb1
sdb1 is the partition.
sdb is the block device.