Why did os make sda1 partiton read-only ?

[kdeuser]

Hi,

I am stumped here as to why partition sda1 was made read-only ?

reel@BM2LTSR66RBin:/media/hd/home/reel$ cat /etc/fstab
# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point>   <type>  <options>       <dump>  <pass>
proc            /proc           proc    nodev,noexec,nosuid 0       0

# / was on /dev/sda1 during installation
/dev/sda1 	/               ext4    errors=remount-ro 0       1

# swap was on /dev/sda3 during installation
/dev/sda3	 none            swap    sw              0       0
UUID=e0e4bb02-3527-4ae8-88a7-78c96d69c3df	/media/hd	auto	defaults,nofail	0	2
reel@BM2LTSR66RBin:/media/hd/home/reel$

Need write permission on media/hd too.

Thanks.