Support for DIAG access to Disks

modulename: dasd_diag_mod.ko

configname: CONFIG_DASD_DIAG

Linux Kernel Configuration
└─>Device Drivers
└─>Block devices
└─>Support for DIAG access to Disks
In linux kernel since version 2.6.20 (release Date: 2007-02-04)  
Select this option if you want to use Diagnose250 command to access
Disks under VM. If you are not running under VM or unsure what it is,
say "N".

source code: