Warning Input/output error (5) in /etc/inc/auth.inc on line 1253 cant log in

[hubercior]

Hello
I would like to log in to my pfsense via firefox and I have following error

Warning: session_start(): open(/var/tmp//sess_48e661a79ab6dc50f76b619c72d492a3, O_RDWR) failed: Input/output error (5) in /etc/inc/auth.inc on line 1253

I can't login (administrator) so how can I log in and what is the problem ?

pfsense version
2.0-RC3 (i386)
Please Help !

[wallabybob]

RC3 has been superseded. You should upgrade your firmware to 2.0 release and see if the problem goes away.

[hubercior]

Sorry it is 2.0 :)

[hubercior]

Any solution ? How can i login to pfsense  by browser ?

[jimp]

Check the system log from the console (such as clog /var/log/system.log or dmesg -a) and you'll probably find that your HDD is failing and tossing a bunch of DMA timeouts or g_vfs_* errors.