fdisk command doubt

[shariefbe]

Hi i am trying to do partition in my SD card. for that i tried

my device name is sdb1. but it says

ariem@ariem-desktop:/dev$ fdisk /dev/sdb1

Unable to open /dev/sdb1

I dont know what will be the problem. Please help me

[shariefbe]

Now it works fine. I partitionaed my SD card. ANd it shows the out for "print the partition table" is

Disk identifier: 0x00000000

     Device Boot      Start         End      Blocks   Id  System
/dev/sdb1p1               1           4        8032+  83  Linux
/dev/sdb1p2               5          11       14112   83  Linux
/dev/sdb1p3              12         956     1905120   83  Linux

Command (m for help):

Now in what file system this partitions are. And how to change the file system of each partition.
When i open /media/disk i am not seeing any partitioned part. Just it shows all the things. what is wrong?

[shariefbe]

Sorry i partitioned only one partion into three. Now i partitoned the whole disk into three partition
Now i partitoned the whole disk. see the partition table

Disk identifier: 0x00000000

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1               1           4        8032+  83  Linux
/dev/sdb2               5          11       14112   83  Linux
/dev/sdb3              12         957     1907136   83  Linux

Now how to change the file system for each partion?
i want to change
first partition as RAW
Second partition as FAT32
Third as EXT3
What are the command i have to give change the file system of each partition. I am confused. Please help me

[Lakshmipathi]

You would need to use ,the option t with fdisk to set a file system type.

check this site for fdisk tutorial,Partitioning with fdisk

HTH