Please see Update #2 below…
I have a Drobo GEN 2 with 4 3TB hard drives that I’ve connected to my iMac to use as my primary Apple Time Machine backup device, and Time Machine has been backing files up for 6 months or so now.
But I noticed recently when trying to navigate through the Time Machine interface that I can’t go back in time. Time Machine only lets me access the most recent backup.
Is this a known issue with Time Machine and a Drobo GEN 2?
If so, can anyone recommend a backup app that actually works on the GEN 2?
I’m currently running Drobo Dashboard v2.6.4  and Firmware v1.4.2 [1.254.50341].
Thanks in advance for your help with this issue. _henry
Update #1: I have since noticed that my Time Machine backup from an Apple MacBook Pro to my Drobo GEN 2 works just fine. I can go back in time to access any previous backup. So I guess the problem is more about how my iMac Time Machine backup file is configured. Has anyone else encountered this issue before? I’ll go ahead and search on the Apple Support site, see if I can find any information there, and report back if I figure anything out.
Update #2: I have discovered that when I restart my iMac with the Drobo GEN 2 on, the Drobo mounts as a Time Machine drive w/ the Time Machine icon. In this state, the Time Machine works as it normally should, allowing me to go back into the history of the backups. When I start up my iMac without the Drobo unit powered up, and then plug it in with the Drobo dashboard open, it mounts as a Drobo drive with the Drobo drive icon on the desktop. In this state, Time Machine doesn’t function as it should. Mystery solved. Issue answered – not fixed – but at least I have a work-around.