AIX

I am facing haging problem with AIX 5.2 box. It is not really hanging but do not allow to login or telnet or rlogin. ping will work.
When I type the first character of the username on CDE login it suddenly suspends the login screen and displays shell login screen. Here if we enter the username and password it will not go further but just hangs.
when I try to telnet to this system it won't connect giving the error:
<host name>:"protocol failure due to unexpected closure from the server end".

Now if the system is rebooted it will work normally for around 3 hours and then goes to the same error stage given above. What could be the problem. Where to start?? please help me,

First thing first check the error log and disk space.

Regards,

vjm

checked disk space is OKerrpt shows the following error:


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Code:

USER DATA I/O ERROR

Probable Causes
ADAPTER HARDWARE OR MICROCODE
DISK DRIVE HARDWARE OR MICROCODE
SOFTWARE DEVICE DRIVER
STORAGE CABLE LOOSE, DEFECTIVE, OR UNTERMINATED

        Recommended Actions
        CHECK CABLES AND THEIR CONNECTIONS
        INSTALL LATEST ADAPTER AND DRIVE MICROCODE
        INSTALL LATEST STORAGE DEVICE DRIVERS
        IF PROBLEM PERSISTS, CONTACT APPROPRIATE SERVICE REPRESENTATIVE



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Should I replace the hard disk or any other hardware??

First run diag maybe it will give you better answer what is happening.

Do you have disks on rootvg mirrored ?
If yes, then I would suspect scsi cables or the controller.

Errpt suggestions are quite clear
Recommended Actions

thank you all. Problem solved. I updated the disk microcode.