Virtual tape on z/OS (was: Virtual tape on VM)

2008-06-28 Thread Lindy Mayfield
Just curious, how is that done on z/OS? -Original Message- From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf Of McKown, John Sent: 27. kesäkuuta 2008 23:32 To: IBM-MAIN@BAMA.UA.EDU Subject: Re: Virtual tape on VM There is a product from CA, also called VTAPE, which

Re: Virtual tape on z/OS (was: Virtual tape on VM)

2008-06-28 Thread Kees Vernooy
List [mailto:[EMAIL PROTECTED] On Behalf Of McKown, John Sent: 27. kesäkuuta 2008 23:32 To: IBM-MAIN@BAMA.UA.EDU Subject: Re: Virtual tape on VM There is a product from CA, also called VTAPE, which runs on z/OS. It emulates tape on z/OS DASD. We got rid of it due to high CPU utilization. We never

Re: Virtual tape on VM

2008-06-28 Thread Glenn Miller
Hi Lindy, Don't know if this will help, but I recall using a product about 10, maybe 15 years ago on our VM systems called: VM Magic , from a company called SDI ( looks like SDISW now ). It allowed the user to emulate any DASD device on any real DASD device. In our case we needed to run a

Re: Virtual tape on VM

2008-06-27 Thread Paul Gilmartin
On Thu, 26 Jun 2008 11:48:35 -0500, Thomas Kern [EMAIL PROTECTED] wrote: For programs inside a virtual machine that use standard CMS TAPEIO macros for their I/O, you can create a nucleus extension that intercepts the tape I/O and transforms it in some way. My recollection, ancient, fuzzy, and

Re: Virtual tape on VM

2008-06-27 Thread Kees Vernooy
We used to have a product under VM called VTAPE, from STK (now SUN) I believe, that emulated virtual tapes and units on VM disks. We do z/OS here, not VM, that is done by another department, so I could be incorrect on the details. Kees.

Re: Virtual tape on VM

2008-06-27 Thread McKown, John
-Original Message- From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf Of Kees Vernooy Sent: Friday, June 27, 2008 3:29 PM To: IBM-MAIN@BAMA.UA.EDU Subject: Re: Virtual tape on VM We used to have a product under VM called VTAPE, from STK (now SUN) I believe

Re: Virtual tape on VM

2008-06-27 Thread Kees Vernooy
John, You are right, I know this product, but this is not the one I mean. I searched some and I think it is this VTAPE product: http://www.vsoftsys.com/vssiprod.htm Kees. -- For IBM-MAIN subscribe / signoff / archive access

Virtual tape on VM

2008-06-26 Thread Lindy Mayfield
The Hercules and Flex emulators can also emulate tape drives using a couple of different formats, AWS, etc. How difficult would it be to do something similar on z/VM? And what ways might someone go about it? Lindy --

Re: Virtual tape on VM

2008-06-26 Thread Thomas Kern
For programs inside a virtual machine that use standard CMS TAPEIO macros for their I/O, you can create a nucleus extension that intercepts the tape I/O and transforms it in some way. Two examples are the BLOCKIO program that was used by lots of installations to increase the real blocksize of data

Re: Virtual tape on VM

2008-06-26 Thread Thomas Kern
Correction: I think I got the name of the first example wrong. It might be BLOCKTAP not BLOCKIO. /Tom Kern On Thu, 26 Jun 2008 11:48:35 -0500, Thomas Kern [EMAIL PROTECTED] wrote: For programs inside a virtual machine that use standard CMS TAPEIO macros for their I/O, you can create a nucleus

Re: Virtual tape on VM

2008-06-26 Thread Lindy Mayfield
2008 19:49 To: IBM-MAIN@BAMA.UA.EDU Subject: Re: Virtual tape on VM For programs inside a virtual machine that use standard CMS TAPEIO macros for their I/O, you can create a nucleus extension that intercepts the tape I/O and transforms it in some way. Two examples are the BLOCKIO program

Re: Virtual tape on VM

2008-06-26 Thread Thomas Kern
19:49 To: IBM-MAIN@BAMA.UA.EDU Subject: Re: Virtual tape on VM For programs inside a virtual machine that use standard CMS TAPEIO macros for their I/O, you can create a nucleus extension that intercepts the tape I/O and transforms it in some way. Two examples are the BLOCKIO program that was used