Can't get your linux server to reboot

I currently ran into a problem with my voice server which runs asterisk on a linux platform. I receive the following error after trying to reboot:
# reboot
bash: /sbin/reboot: Input/output error
# shutdown -r now
bash: /sbin/shutdown: Input/output error
From my understanding this problem is most common related to problems with the hard drives in the server. I was able to get these commands to work after I did a remote reboot through my APC rebooter website. If the server was located locally I would have manually rebooted it.
Upon further investigation I checked my /var/log/messages file. I found the following:
Feb 9 00:13:15 voice kernel: Non Fatal error on ida/c0d0
Feb 9 00:13:15 voice kernel: Fatal error on ida/c0d0
Feb 9 00:13:15 voice kernel: Buffer I/O error on device ida/c0d0p2, logical block 3823704
Feb 9 00:13:15 voice kernel: lost page write due to I/O error on ida/c0d0p2
I actually think the problem here is due to the fact that someone is port scanning my server which is some how locking up all of my resources. See my next blog for what I did to correct the problem.

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