Ext3 file system error

[fkunal]

Hello All,
I am facing a issue with one of my servers. I have a HP proliant server with 4 gb Ram and 1 TB harddisk, there are two sata disks of 500 GB configured in Raid 0, i have installed centos 4 on the server. On centos i have my video conferencing software running. Yesterday my server got hang and after a hard rebotted the server i am getting the following message:

Ext3-fs- Recovery request on read only file systems.
Ext3-fs- Write access will be enabled during recovery

I am not able to get pass this message.
I also tried accessing the grub files but was unsuccessful.

Can any one please tell me where the problem lies and why such a message has come?