Disklabel type

[mick crane <mick.crane@gmail.com>]

I don't know what happened here.
Can I change the Disklabel without messing things up or is it necessary 
?

root@pumpkin:~# fdisk /dev/sda
Disk /dev/sda: 223.57 GiB, 240057409536 bytes, 468862128 sectors
Disk model: KINGSTON SA400S3
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x64b83d98

Device     Boot  Start       End   Sectors   Size Id Type
/dev/sda1  *      2048    499711    497664   243M 83 Linux
/dev/sda2       501758 468860927 468359170 223.3G  5 Extended
/dev/sda5       501760 468860927 468359168 223.3G 8e Linux LVM


root@pumpkin:~# e2label /dev/sda
e2label: Bad magic number in super-block while trying to open /dev/sda
Found a dos partition table in /dev/sda

mick
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Key ID    4BFEBB31