drobo v2 and the infamous seagate 1tb drives which sometimes took too long to respond.
drobo assumed two out of the 4 had failed and dismounted the pack. back in those days there was no read only / emergency firmware - i lost everything on the array purely because drobo had simultaneously flagged as bad two perfectly good disks.
drobopro fairly full (85-90%) with 8 x 2tb disks… heavy reading and writing from it for several hours… its internal garbage collection wasnt fast enough and it ran out of space internaly (still showed as 85-90% full on the lights and in dashboard)
it rebooted spontaneously - and then got stuck in the infamous reboot loop
tech support by phone sent me a new firmware - that firmware turned my drobopro into the worlds heaviest doorstop (totally killed it).
DRI replaced the drobopro with a second one - but since the flaw was with their software/my diskpack the new drobo was back in the reboot loop!!!
they sent me another new firmware - this one updated the drobo but it was still in a reboot loop
i was able to put that into read only mode and after an hour of booting it finally mounted the diskpack and i had to copy EVERYTHING off the drobo since it was only usable in read-only mode.
that was when i bought my synology…