Hi There can be several reasons why there is a difference in the number of scratch tapes between your onsite and offsite 3494:s:
1. Reuse Delay. Is reuse delay activated on the off-site pool(s)? 2. Is there equal number of volumes in the on-site and off-site 3494:s accoring to the TSM inventory? 3. Do you have the same amount of reclaimable space in both on-site and off-site(easily checked running the command "select sum(physical_mb) from occupancy where stgpool_name like "your copypool" / "your on-site pools"). 4. A dumb question; do you have the same drive typ and media type in both libraries? Best Regards Daniel Sparrman ----------------------------------- Daniel Sparrman Exist i Stockholm AB Propellervägen 6B 183 62 TÄBY Växel: 08 - 754 98 00 Mobil: 070 - 399 27 51 Schaub Joachim Paul ABX-SECE-ZH <[EMAIL PROTECTED]> Sent by: "ADSM: Dist Stor Manager" <[EMAIL PROTECTED]> 2004-08-24 14:11 Please respond to "ADSM: Dist Stor Manager" <[EMAIL PROTECTED]> To [EMAIL PROTECTED] cc Subject AW: 2 3494 Tape libraries seem to have very different capacities. Any ideas? How about your reclaim and collocation settings? Are they equal? regards joachim -----Ursprüngliche Nachricht----- Von: ADSM: Dist Stor Manager [mailto:[EMAIL PROTECTED] Auftrag von John C Dury Gesendet: Dienstag, 24. August 2004 13:21 An: [EMAIL PROTECTED] Betreff: Re: 2 3494 Tape libraries seem to have very different capacities. Any ideas? Somehow this thread got a little messy so I'll update it with everything I know and answer everyone's questions (I think). A recap: We have 2 3494 libraries, one local and one remote. The remote one is used for backing up the local one only. There is a huge discrepancy between the number of scratch tapes in the local and remote libraries although they both appear to have the same amount of data. Things people suggested I check: Compression is on for all drives in both libraries. I checked. I have "reuse delay" set at 0 on both 3494 libraries so no tapes go into pending on either library. They immediately become scratches after reclamation. We run a job nightly that deletes volhistory for database backups. (del volhist type=dbb todate=today-2). See immediately below for a possible explanation although I don't understand why this would cause it. Anyone? Looks like I'll be caling IBM. <sigh> John We originally had a combination of 3590J and 3590K tapes in the 3494LOCAL library. I moved the data off of the 3590J tapes and then checked them out and checked in 3590K volumes that has the same volume labels as the original 3590J volume. Essentially I replaced all the 3590J tapes with 3590K tapes with the same volume labels. The libary manager was updated to reflect the new 3590K volumes before they were checked in. Could this have caused this problem? John ----- Forwarded by John C Dury/DLC on 08/23/2004 02:37 PM ----- John C Dury/DLC 08/23/2004 02:28 To PM ADSM-L cc Subject Re: 2 3494 Tape libraries seem to have very different capacities. Any ideas? Here is the output from that command. It looks pretty similar to me. I also checked compression for both local and remote libraries. All are on. We also run a job every night that deletes the dbb volhistory which allows only 2 days of retention. (del volhist type=dbb todate=today-2) STGPOOL_NAME: 3494LOCAL Unnamed[2]: 38531539 Unnamed[3]: 11776076.83 Unnamed[4]: 11886072.01 STGPOOL_NAME: 3494REMOTE Unnamed[2]: 38513745 Unnamed[3]: 11773755.03 Unnamed[4]: 11876887.56 These are all great suggestions which is why I asked here but I'm still at a complete loss. John The output from "select stgpool_name,sum(num_files),sum(logical_mb),sum(physical_mb) from occupancy group by stgpool_name" should give some indication of whether the same amount of stuff is getting to the remote storagepools. David >>> jdury AT DUQLIGHT DOT COM 8/23/2004 1:26:57 PM >>> We have 2 3494 tape libraries. One is local and the other is remote. The local one (3494LOCAL) receives all the data from the nightly backups as it gets migrated from disk. The remote one (3494REMOTE) is only used as the target of backing up the 3494LOCAL storage pool which gets done everyday during the day. 3494LOCAL has 577 library volumes in it. 3494REMOTE has 494 library volumes in it. Both tape libraries only have 3590K tapes in them. My problem is that 3494LOCAL has 62 scratch tapes available and 3494REMOTE has 207 scratch tapes in it. Reclamation runs daily and sets the same percentage (57) for both libraries. How can there be such a huge difference in the number of scratch tapes if both libraries should roughly have the same amount of data? It's making me a little nervous that 3494REMOTE doesn't have the same data or something somewhere is going wrong. Any ideas? Thanks, John
