This issue was discussed many times on this list. The main trick is to update all volumes for low density tapes ACC=READOnly. The reason is that 3590E drives can only read low density tapes but cannot write to them at low density. After either reclamation or MOVE DATA (i.e. manually forced reclamation) the tape is free and you can start writing it at high density. Should you "trap" and re-label cartridges is a question I cannot answer from first hand - I haven't upgraded 3494 (yet). But you can try it by yourself and prove it in practice - do MOVE DATA on a cartridge and write some data on it (generate backupset, define new pool and the tape as private, etc.). If it works ...
Zlatko Krastev IT Consultant Shawn Bierman <[EMAIL PROTECTED]> on 15.11.2001 21:20:15 Please respond to "ADSM: Dist Stor Manager" <[EMAIL PROTECTED]> To: [EMAIL PROTECTED] cc: Subject: upgrading tape density Hello, ** TSM 4.1 -- AIX 4.3.3.0 -- 3494 Library ** We upgraded our 3590B drives to 3590E1A drives. We've also started using the double density tapes (K). If I am not mistaken, once the tape has been labeled it will remain at the density that it was labeled at. So, if I labeled a tape with the old 3590B drives and the low density tape and this tape gets used and eventually becomes scratch again, will it ever be re-labeled at the higher density so that we are getting our moneys worth out of our upgrades? I thought about using a script that would do a 'trap' and watch for tapes becoming scratch and then just relabel them at that point. Anyone been in this situation before? thanks for your time. -shawn Shawn L. Bierman Unix Technical Support Analyst II Methodist Healthcare Information Systems (901) 516-0143 (office) (901) 516-0043 (fax)
