Hi Dave,
I have had experience with two different VTLs, both of which allowed recovery of scratch volumes, we used TMS with both of them. The first was an IBM 3494 ATL/VTS, the second a Bus-Tech virtual only appliance. For both, if virtual volumes went to scratch, and the volser had not yet been re-used, the scratched volume could be reset. We could do those recoveries ourselves. In the case of the IBM 3494 virtual volumes, even if the volser had been re-used, IBM was able to recover several volumes for us that had been re-used several times, as long as the VTS had sufficient space so that the internal disk area had not be overwritten . With the Bus-Tech appliance, it does not overwrite scratched volumes until the space is actually needed to write new data. The more free space available, the more time to recover - as long as there are enough volsers defined. These were the setup/install options we chose, YMMV, and they have worked really well for us. Linda Mooney ----- Original Message ----- From: "Dave Kopischke" <dgkopisc...@oppenheimerfunds.com> To: IBM-MAIN@bama.ua.edu Sent: Wednesday, June 23, 2010 8:13:53 AM GMT -08:00 US/Canada Pacific Subject: Re: Disk replacing Tape? On Tue, 22 Jun 2010 20:08:43 -0400, George Henke <gahe...@gmail.com> wrote: ... >Just before cutover, the tape management system, IBM's RMM (Removable Media >Management), inadvertently released 1000's of tapes to the SCRATCH pool by >mistake. > ... >Had that condition persisted 24 hours it would have been a complete >disaster, nightmare. ... >Needless to say there are also software reasons for eliminating tape. > Just to be clear, our implementation is virtual tape. We still use TMS to manage the virtual tapes. If something like this were to have happened to us, the tapes would have gone scratch. There is no operator intervention. We have a code gateway for passing scratch tape VOLSERs to the VTL. Any anomolies have to be caught in the code or the volumes go scratch. With tape, you can recover the data if the volume hasn't been overwritten. With the VTL, probably not. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
