please help my root fs is read only

[Rob <wasguru gmail com>]

I have no idea what happned.  When I checked my mail this morning
I got an error deleting a message so I wen't to the server and
discovered the root fs was somehow readonly.  I tried to remount
it and it said it was a read only device. I rebooted, when grub came up
I noticed "ro" in the options. I removed that and it still booted read
only. I have no idea what to do. Can anyone give me some advice? 

Thanks

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Robert Bell
WASGuru gmail com