On Tue, 17 Apr 2007 14:48:17 +0200, Vernooy, C.P. - SPLXM <[EMAIL PROTECTED]> wrote:
> > >"Mark Zelden" <[EMAIL PROTECTED]> wrote in message >> >> With 3420s 2 systems could write on the tape at the same time. With >3480 >> and newer (including virtual implementations), there is an assign from >the >> control unit that will prevent that. >> >> Mark > >I think it is still possible if you vary them online with SHR to both >systems and you don't have any software, like CA MIA, to manage them? > It is possible to get them online, but if the device is in use it is still "assigned" to one system by the control unit. As a matter of fact, this is what made it possible to share tape devices across sysplex boundaries with IEFAUTOS IIRC. Instead of the assign being done when the device was put online, it was done (attempted?) at allocation time. But this may only even be allowed (varied online to more than one system with SHR) if the device was defined as auto-switchable in HCD. Scott Fagen is the expert on this stuff... perhaps he will chime in before I post some erroneous information. Mark -- Mark Zelden Sr. Software and Systems Architect - z/OS Team Lead Zurich North America / Farmers Insurance Group: G-ITO mailto:[EMAIL PROTECTED] z/OS and OS390 expert at http://searchDataCenter.com/ateExperts/ Systems Programming expert at http://expertanswercenter.techtarget.com/ Mark's MVS Utilities: http://home.flash.net/~mzelden/mvsutil.html ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
