Newbie Question about Formating Partitions
kfuchs at winternet.com
Sun Jul 11 14:02:41 PDT 2004
"noname" aka braindead wrote:
>I have some small questions:
>1. After creating Partitions with cfdisk, is it enough to format these
> mke2fs - for ext2 partitions
> mkfs.ext3 - for ext3 partitions
> mkswap - for swap partitions (and then swapon)
> to use them ?
First of all, the term "format" is not accurate. These commands make
filesystems in the specified partition. (Low level) formatting is
generally done on a hard drive as a final step in its production.
Yes (rephrasing "format" with "make a filesystem in"), just be sure to
specify the correct block device as the argument. For example:
# mke2fs /dev/hda6
# mkfs.ext3 /dev/sda6
# mkswap /dev/hda5
# mkswap /dev/sda5
An ext3 filesystem can also be made with the -j option of mke2fs:
# mke2fs -j /dev/sda6
Note that ext3 is simply ext2 with a journaling file added. The -j
option simply adds a journaling file whose size is determined by the
total size of the partition specified by the block device argument.
>2. I mentioned that a formating of a partition with mkfs.ext3 is much faster
>than formating it with the DOS command "format", is this normal ?
Yes, mkfs.ext3 is much faster than the DOS format. It only needs to set
up the filesystem header information (which is a very small fraction of
the partition's size) and the similarly small journaling file.
Note that mkfs.ext3 (or mks2fs) do not actually format the partition.
They simply create a filesystem on the partition and usually write to
only a small fraction of the blocks on that partition (since the
filesystem created is almost empty).
>3. And i mentioned too, that formating a 600mb swap partition with mkswap
>takes more time than formating a 8gb ext3 partition with mkfs.ext3, is
>this normal, or did i made anything wrong ?
600MB is very big for a swap partition. 8GB for a ext3 partition is
becoming rather small now that 200+ GB drives are common and relatively
cheap. It would not surprise to see that formating the 600MB partition
as swap would take longer than making a 8GB ext filesystem.
Ken Fuchs <kfuchs at winternet.com>
More information about the lfs-support