File System

Controller

• SCSI
• EDA
• SATA

Make File with Specific size

Following code will create 200 MB file.

dd if=/dev/zero of=/tmp/mdisk.txt bs=2048 count=100000

bs -> block size

We use 100000 of 2048 kb and it results almost 200 MB.

Loop Back

It's a virtual network card.

Partition

$ dd if=/dev/zero of=/tmp/mdisk.txt bs=2048 count=100000
$ mkfs.ext3 /tmp/mdisk.txt
$ sudo dlosetup /dev/loop0 /tmp/mdisk.txt
$ mkdir /home/lab2/mypartition
$ sudo mount /dev/loop0 /home/lab2/mypartition

/dev/zero actually is a program.