If you are z/VM you can use TRACKWRITE (currently in the authors edition) pipe stage to write just about anything you want to an ECKD device..
On Tue, May 17, 2016 at 9:36 AM, Mark Post <[email protected]> wrote: > >>> On 5/17/2016 at 11:51 AM, Scott Rohling <[email protected]> > wrote: > > I'm wondering if something like this would work?: > > > > You can add 'count=xx' to only write so many blocks... not sure how many > > it takes to wipe formatting info - nothing to play with at the moment.. > > > > > > dd if=/dev/zero of=/dev/dasdX iflag=nocache oflag=direct bs=4096 > > It doesn't seem to work. You're still going to be limited by the > dasd_eckd_mod driver to writing in the formatted space and not the raw > device itself. I even tried turning on the raw_track_access and that > didn't help either. Trying to use both that and oflag=direct caused an I/O > error and the dd aborted. > > > Mark Post > > ---------------------------------------------------------------------- > For LINUX-390 subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO LINUX-390 or > visit > http://www.marist.edu/htbin/wlvindex?LINUX-390 > ---------------------------------------------------------------------- > For more information on Linux on System z, visit > http://wiki.linuxvm.org/ > ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For more information on Linux on System z, visit http://wiki.linuxvm.org/
