Ian: You can roll your own/fend for yourself. Start by using DDR. Say your mdisk is at vaddr 1B0. DDR INPUT 1B0 DASD TYPE 0 0 3 cyl 0 head 0 record 3 has the label information. You can decode the info there and get the numbers you need. Or if its a small sized disk, and you have sufficient tdisk, define a tdisk of the same size, ddr the r/o over to the r/w tdisk and et voila you can access and then see your stats. This would even work by creating a 1 cylinder tdisk (and then just copy cyl 0), but ... it's weird and somewhat dangerous .... David
________________________________ From: The IBM z/VM Operating System on behalf of Ian S. Worthington Sent: Tue 9/18/2007 12:20 PM To: [email protected] Subject: [IBMVM] ACCESS empty RR disk fails I've come across this a few times but never understood *why* accessing an empty disk I've linked RR should fail (rc=28, iirc). Any good reason for that? And any way to *prevent* it from failing? (I'm not after the files I'm after the disk stats I can only get when the disk is accessed.) ian ...
