Select this option if you want to use your expanded storage on S/390 or zSeries as a disk. This is useful as a _fast_ swap device if you want to access more than 2G of memory when running in 31 bit mode. This option is also available as a module which will be called xpram. If unsure, say "N".
Support for dcss block device
Enable this option if you want to access DASDs directly utilizing S/390s channel subsystem commands. This is necessary for running natively on a single image or an LPAR.
Enable this option if you want to see profiling information in /proc/dasd/statistics.
ECKD devices are the most commonly used devices. You should enable this option unless you are very sure to have no ECKD device.
Select this option to be able to access FBA devices. It is safe to say "Y".
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".
This driver provides a character device interface to the DASD extended error reporting. This is only needed if you want to use applications written for the EER facility.