Then there is the third level. 0. Render the disk unreadable by the average user.
For this one, rename all of the files so that they are mode 0. :-) These users have never even heard of DDR, so they cannot break the code. Regards, Richard Schuh -----Original Message----- From: The IBM z/VM Operating System [mailto:[EMAIL PROTECTED] On Behalf Of Alan Altmark Sent: Tuesday, June 12, 2007 2:03 PM To: IBMVM@LISTSERV.UARK.EDU Subject: Re: Scragging a disk On Tuesday, 06/12/2007 at 03:45 EST, Mike Walter <[EMAIL PROTECTED]> wrote: > Just how badly should the mdisk be "scragged" when you're done? Wouldn't the > typical, tried-and-true method work? Two CMS users linking the disk MW, with > one overlaying the other's files. It's worked (unintentionally) for CMS users > for nearly 35 years now! :-) Right. There are two levels of "scragging": 1. Render the disk contents unreadable by a systems programmer (and, hence, by an operating system). 2. Render the disk contents unreadable by a data recovery expert (who can have access to the physical media). The techniques for each are very different. For #1, use the CMS FORMAT command against it. For #2, unhook the disk device and put it in a crusher. Alan Altmark z/VM Development IBM Endicott
