robr Posted August 1, 2015 Report Share Posted August 1, 2015 Hi! I've been running a backup to an external USB drive without problems for some time. I just upgraded the PC running Retrospect to Windows 10 (from Windows 7), but now I can't back up that PC's C drive and I'm getting this error: Can't access volume OS (C:), error -1102 (drive missing/unavailable) My script also backups up clients and those are working (except for another recently upgraded Windows 10 PC, but I'll look at that later). So the Retrospect backup PC can back up other clients, but not itself. Any thoughts on how to fix this? Thanks! Rob 1 Quote Link to comment Share on other sites More sharing options...
Lennart_T Posted August 1, 2015 Report Share Posted August 1, 2015 Retrospect doesn't see the Windows 7 C: drive as the same drive as the Windows 10 C: drive (even if they have the same name etc). Go to Configure->Volumes and "Forget" both C: drives. Then go to Configure->Scripts and add the new C: drive. Quote Link to comment Share on other sites More sharing options...
robr Posted August 2, 2015 Author Report Share Posted August 2, 2015 That fixed it up. Thanks! Quote Link to comment Share on other sites More sharing options...
Scillonian Posted August 2, 2015 Report Share Posted August 2, 2015 From the six updates to Windows 10 I have done so far I have observed that at some point during the upgrade the Windows 10 installer reduces the Windows 7 (and 8.1) volume by ~450MB to allow space for a new 450MB partition. From what I can find this new partition appears to contain diagnostic and recovery tools. This resize of the volume alone is enough for Retrospect to see it as a different volume. Quote Link to comment Share on other sites More sharing options...
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