As I understand it another driver in the same rack doing work is enough to effect the performance of the other drivers in the rack. This is why you use fancy expensive "enterprise grade" drives as they can cope better with it.
> In the presence of an external vibration caused
by adjacent disk drive seek operations the bandwidth
performance of a consumer-grade disk drive “feeling”
these vibrations will decrease about 10%-15% when
reading data and about 25%-40% when writing data
Don't really know if this is enough to actually cause damage if the disk does not have the hardware to detect this vibration.
https://www.dtc.umn.edu/publications/reports/2005_08.pdf
> In the presence of an external vibration caused by adjacent disk drive seek operations the bandwidth performance of a consumer-grade disk drive “feeling” these vibrations will decrease about 10%-15% when reading data and about 25%-40% when writing data
Don't really know if this is enough to actually cause damage if the disk does not have the hardware to detect this vibration.