-----Original Message----- From: Jim Wangler [mailto:[EMAIL PROTECTED] Sent: Monday, January 09, 2006 2:23 PM To: IBM Mainframe Discussion List Subject: RE: Use of a VTS and ATL in a DR situation.
John, We do the scenario that you're planning, with the exception that at D/R, on the floor system, we don't normally use the ATL. We restore enough to IPL from their native drives using tape hangers. Then here comes the problem, which we have not solved satisfactorily in my opinion. Tape copy has two (at least) modes... one just recatalogs the D/R tapes (INPLACE) so that when the applications restores start they use the physical tapes and physical ATL drives to do their restores. The problem with this is that we are limited in the amount of concurrency of the applications restores by the number of ATL drives and by how densely stacked the D/R tapes are. Our biggest problem is the second one... we stack our physical tapes, and then get contention for the VOLSER during the applications restore. The other TAPECOPY mode (COPYRCVY) is to copy the physical tapes into the VTS. This can take a long time, but when there finished the applications restores can progress faster. Incase 1) we're out of the process faster (as soon as the recatalogs take place), but the rest of the recovery is slower. In case 2, it takes us longer, but the applications restores are quicker. Hope it helps Jim Wangler Information Technology This message (including any attachments) contains confidential information intended for a specific individual and purpose, and its content is protected by law. If you are not the intended recipient, you should delete this message and are hereby notified that any disclosure, copying, or distribution of this transmission, or taking any action based on it, is strictly prohibited. ---------------------------------------------------------------------- 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 ---------------------------------------------------------------------- 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
