# Disabling IO error driver notification on Red Hat ES4 **URL:** \ **Category:** Plug N' Play\ **Tags:** hardware\ **Created:** [January 20, 2009, 12:35pm UTC](https://forums.digi.com/t/disabling-io-error-driver-notification-on-red-hat-es4/3551 "2009-01-20T12:35:54Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![sothis](https://avatars.discourse-cdn.com/v4/letter/s/ecae2f/32.png) [@sothis](https://forums.digi.com/u/sothis)\ **Post date:** [January 20, 2009, 12:35pm UTC](https://forums.digi.com/t/disabling-io-error-driver-notification-on-red-hat-es4/3551/1 "2009-01-20T12:35:54Z")
Hello, I’ve a Wi-SP with Realport Driver for Linux ver. 1.9-17. What I’ve experienced is that if the server lost connectivity with the Digi (power on/off) the driver notify to the application that manage the tty with an I/O error. I verified it with minicom getting this error: [root@lisn4006 ~]# minicom minicom: can’t open /dev/ttyM00: resource not available temporally That’s compressible but in my particular case I would prefer to avoid it because my application is not managing exceptions correctly. Can I change this behavior?. Thanks in advance. Model: Digi Connect Wi-SP Firmware Version: 2.4.5.2 (Version 82001220\_H3 06/19/2007) Boot Version: 1.1.3 (release\_82001187\_C) POST Version: 1.1.3 (release\_82001188\_E) ---
**Author:** ![userid0](https://avatars.discourse-cdn.com/v4/letter/u/f6c823/32.png) [@userid0](https://forums.digi.com/u/userid0)\ **Post date:** [January 20, 2009, 1:53pm UTC](https://forums.digi.com/t/disabling-io-error-driver-notification-on-red-hat-es4/3551/2 "2009-01-20T13:53:16Z")
There is no means of changing the driver notification. Essentially, when the network or power is out to the Wi-SP unit, the serial port (UART) is not accessible. The following knowledge base article offers additional details and a possible workaround for your application: [http://www.digi.com/support/kbase/kbaseresultdetl.jsp?id=684](http://www.digi.com/support/kbase/kbaseresultdetl.jsp?id=684)