[jlftrsh]

An odd problem with Retrospect has developed. I have made numerous CD and DVD backups with the program over the years, currently running version 6.1.126 on an iMac G5 and Powerbook, both running Tiger. I recently discovered that some disks I had made with Retrospect could not be read. I have one backup set that spans 7 DVDs, and the disks that were made before May 2005 are OK, but Retrospect can't deciper any of the newer disks. And it doesn't matter whether I let Retrospect examine the disks on the Powerbook or the iMac.

What is particularly odd is that I have just made some test DVD backups (of smaller datasets, so the data all fit on one DVD), and these seem to have no problems. So far, it is only when the backup set spans more than one disk that the disks become unrecognizable. And the failures are occurring on backup sets created both on the Powerbook and on the iMac. I am currently in the midst of testing yet another multiple-disk backup set.

I have tried 3 different kinds of media, but this seems not to be the issue.

Any thoughts or suggestions would be appreciated.

[jlftrsh]

OK, a little more information. Tried reading the disks in a third computer, an iMac G4, same OS, same Retrospect, and the disks could be read on this machine. On the iMac G4 the optical drive is a Pioneer DVD-RW DVR-104. The two drives that cannot read the disks are, on my Powerbook, a Matshita DVD-R UJ-816, and on the iMac G5, a Matshita DVD-R UJ-845.

So is Retrospect so finicky that drives that are listed as supported really don't fully work? Or am I doing something wrong?