Perhaps 6 - 7 years ago we provided some one U server for a client. Initially the server worked fine. Then we upgraded it's disks (originally 80 gigs or so) to

Perhaps 6 - 7 years ago we provided some one U server for a client. Initially the server worked fine. Then we upgraded it's disks (originally 80 gigs or so) to 1TB each (in RAID1 configuration). After the new disks were installed the server started to have multitudes of issues with disk performance and random read / write errors. I think it took us several days to understand that the new spinners where much more sensitive than the original ones - And the large (very powerful) fan (located between the hdds) emitted too much vibration for the disks to operate properly. We ended up swapping the chassis to one with radial fans. Problem solved.