Re: DASD or TAPE attached via TCP/IP
I wonder how it is possible to attach DASD- or TAPE-Devives via TCP/IP. Consider NFS. I guess I need to be more specific: We currently consider moving from our current (shared) z/OS system to a dedicated ADCD-System. From this system we have no access to a Tape (but we need this for QA of our products). So I wonder how (and how hard) it would be to write some thing of software that emulates a tape (and even better: a tape library) so we can also migrate our datasets. The emulated tape should be a bunch of files on a remote Server (Windows or Unix). My problem is that I don't have very deep z/OS knowledge. I'm not dumb ;-), so I guess I could learn the needed stuff (and I want! because I want to understand the things behind the scenes better), but currently I don't know how/where to start (which manual for example). I guess there must be something like a ASM-Macro that registeres a device and the piece of code that handles the commands (CCWs?) for the device. But as I said already, I even don't know where to start bye, Michael -- 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
DASD or TAPE attached via TCP/IP
All, I wonder how it is possible to attach DASD- or TAPE-Devives via TCP/IP. There is a product called mfnetdisk (see mknetdisk.com) that is able to emulate a 3390 that resides on a PC and is accessed via TCP/IP. So... I ask myself how this is possible. And (for me) even more interesting, would it also be possible to do the same for a Tape? Thank you, Michael -- 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
Re: DASD or TAPE attached via TCP/IP
Michael Knigge wrote: All, I wonder how it is possible to attach DASD- or TAPE-Devives via TCP/IP. There is a product called mfnetdisk (see mknetdisk.com) that is able to emulate a 3390 that resides on a PC and is accessed via TCP/IP. So... I ask myself how this is possible. And (for me) even more interesting, would it also be possible to do the same for a Tape? Yes, it is possible, it works. Residence of emulated 3390 on PC is irrelevant. It is also possible for tape ...on other systems. See iSCSI. -- Radoslaw Skorupka Lodz, Poland -- BRE Bank SA ul. Senatorska 18 00-950 Warszawa www.brebank.pl Sd Rejonowy dla m. st. Warszawy XII Wydzia Gospodarczy Krajowego Rejestru Sdowego, nr rejestru przedsibiorców KRS 025237 NIP: 526-021-50-88 Wedug stanu na dzie 01.01.2008 r. kapita zakadowy BRE Banku SA wynosi 118.642.672 zote i zosta w caoci wpacony. -- 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
Re: DASD or TAPE attached via TCP/IP
The following message is a courtesy copy of an article that has been posted to bit.listserv.ibm-main,alt.folklore.computers as well. [EMAIL PROTECTED] (Michael Knigge) writes: I wonder how it is possible to attach DASD- or TAPE-Devives via TCP/IP. There is a product called mfnetdisk (see mknetdisk.com) that is able to emulate a 3390 that resides on a PC and is accessed via TCP/IP. So... I ask myself how this is possible. And (for me) even more interesting, would it also be possible to do the same for a Tape? for historical reference ... the internal csc/vm vm370 release ... mentioned in this old email http://www.garlic.com/~lynn/2006v.html#email731212 http://www.garlic.com/~lynn/2006w.html#email750102 http://www.garlic.com/~lynn/2006w.html#email750430 was somehow leaked to att longlines circa 1975. they took this highly modified csc/vm vm370 release and made numerous local modifications ... including remote device support ... that would run over various kinds of communication links. basically virtual machine channel program simulation would forward the stuff to remote site for actual execution on the real locally attached device. this system manage to propogate to a number of att longline machines. Nearly a decade later, the att national account manager managed to track me down ... longlines had continued to migrate the vm370 system thru various generations of mainframes ... but it came to an end with move to 370/XA ... and he was looking for assistance in helping move longlines off that vm370 system. this isn't all that much difference with standard i/o virtualization, aka a copy of the virtual channel programs are replicated with real address substituted for virtual addresses. in the case of remote device, the replicated real channel programs are run on remote system ... with appropriate fiddling of virtual pages on the application machine and the real pages on the machine where the device was attached. some amount of the fiddling was handled by services running in a separate virtual machine. note this isn't all that different from what is done by various virtual machine mainframe simulators that run on various other kinds of platforms ... and include simulation of various kinds of mainframe i/o devices on completely different kinds of devices. the specific communication mechanism used is the least of the issues. -- 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
Re: DASD or TAPE attached via TCP/IP
Yes, it is possible, it works. Residence of emulated 3390 on PC is irrelevant. It is also possible for tape ...on other systems. See iSCSI. And how to configure on z/OS? Any hint for a manual? Bye, Michael -- 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
Re: DASD or TAPE attached via TCP/IP
Michael Knigge wrote: So... I ask myself how this is possible. And (for me) even more interesting, would it also be possible to do the same for a Tape? How possible???! How is *anything* possible? Software! Tape emulation is even easier than DASD. FWIW, z/VSE has had this capability integrated into the operating system for a long time. They call it VTAPE. Either a local VSAM file or any file on a remote Java server (via TCP/IP) is used. http://www.ibm.com/servers/eserver/zseries/zvse/products/vtape.html -- Edward E Jaffe Phoenix Software International, Inc 5200 W Century Blvd, Suite 800 Los Angeles, CA 90045 310-338-0400 x318 [EMAIL PROTECTED] http://www.phoenixsoftware.com/ -- 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
Re: DASD or TAPE attached via TCP/IP
Yes, and it's very cool! Edward Jaffe wrote: Michael Knigge wrote: So... I ask myself how this is possible. And (for me) even more interesting, would it also be possible to do the same for a Tape? How possible???! How is *anything* possible? Software! Tape emulation is even easier than DASD. FWIW, z/VSE has had this capability integrated into the operating system for a long time. They call it VTAPE. Either a local VSAM file or any file on a remote Java server (via TCP/IP) is used. http://www.ibm.com/servers/eserver/zseries/zvse/products/vtape.html -- Rich Smrcina VM Assist, Inc. Phone: 414-491-6001 Ans Service: 360-715-2467 rich.smrcina at vmassist.com http://www.linkedin.com/in/richsmrcina Catch the WAVV! http://www.wavv.org WAVV 2009 - Orlando, FL - May 15-19, 2009 -- 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
Re: DASD or TAPE attached via TCP/IP
Michael Knigge wrote: Yes, it is possible, it works. Residence of emulated 3390 on PC is irrelevant. It is also possible for tape ...on other systems. See iSCSI. And how to configure on z/OS? Any hint for a manual? The key is on other systems. iSCSI is not supported on z/OS. So, on z/OS it is still impossible. However - in general - it is possible. It remains me a dialog with DB2 admin: - DB2 uses VSAM datasets, how would you imagine a database without VSAM? - I don't know, but others imagine *and do it*. On other platforms. -- Radoslaw Skorupka Lodz, Poland -- BRE Bank SA ul. Senatorska 18 00-950 Warszawa www.brebank.pl Sd Rejonowy dla m. st. Warszawy XII Wydzia Gospodarczy Krajowego Rejestru Sdowego, nr rejestru przedsibiorców KRS 025237 NIP: 526-021-50-88 Wedug stanu na dzie 01.01.2008 r. kapita zakadowy BRE Banku SA wynosi 118.642.672 zote i zosta w caoci wpacony. -- 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
Re: DASD or TAPE attached via TCP/IP
On Wed, 21 May 2008 15:07:23 +0200, Michael Knigge wrote: I wonder how it is possible to attach DASD- or TAPE-Devives via TCP/IP. Consider NFS. -- gil -- 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
Re: DASD or TAPE attached via TCP/IP
The following message is a courtesy copy of an article that has been posted to bit.listserv.ibm-main,alt.folklore.computers as well. [EMAIL PROTECTED] (R.S.) writes: The key is on other systems. iSCSI is not supported on z/OS. So, on z/OS it is still impossible. However - in general - it is possible. It remains me a dialog with DB2 admin: - DB2 uses VSAM datasets, how would you imagine a database without VSAM? - I don't know, but others imagine *and do it*. On other platforms. re: http://www.garlic.com/~lynn/2008i.html#14 DASD or TAPE attached via TCP/IP for some topic drift ... posts in a recent thread in comp.databases.theory: http://www.garlic.com/~lynn/2008i.html#8 pro- foreign key propaganda? http://www.garlic.com/~lynn/2008i.html#12 pro- foreign key propaganda? http://www.garlic.com/~lynn/2008i.html#13 pro- foreign key propaganda? -- 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
