Input/Output error with error code -5

I got a problem running my FORTRAN program in high performance computer cluster. It runs well in my PC but I want to have mass production of data with different initial conditions so I put it in a cluster node with eight cores, simulate eight sets of data.

The program can run without problem in home directory but since I need extra memory space a scratch hard disk is added and I run the programs in this disk.

After a while the program stopped and there is an error message:

PGFIO/stdio: Input/output error
PGFIO-F-/formatted write/unit=6/error code returned by host stdio - 5.
File name = stdout formatted, sequential access record = 181
In source file TipNew8.f90, at line number 2018
FORTRAN STOP

I have run it several times, similar error occurs but the error occurs at different lines. Also it stopped at different time steps each time I run it. This kind of error seems quite random since it occurs at different steps and different lines. Every time it occurs at lines with “write” or “print” function. It runs without problem when I run it in my PC using Microsoft Visual Studio with PGI compiler.

Does anyone have ideas what’s wrong with the program?

Hi Kelisiu,

I found this post and think the same thing is happening to you: http://www.eureka.im/2438.html.

The problem is that the code used to access the ray tracing files can be susceptible to network instabilities when these files reside on networked disks. Beware of using NFS scratch servers to store these files.

My guess is that a similar thing is happening to you where you’re encountering network errors when writing to the NFS scratch directories which in turn causes random I/O errors.

You might want to talk with your network admin to see if they can diagnose the cause.

  • Mat