> Also when a lot of drives die you should look for other culprits as well, is the temperature OK? Is the power stable? (Vibrations?)
Also remember the demo from a Sun guy that showed how screaming to your RAID array had a significant impact on IO in real time (it was actually a dtrace demo): https://www.youtube.com/watch?v=tDacjrSCeq4
Someone ( in the storage industry) also told me of some crap RAID enclosure that had a normal performance until you added a drive in the center slot; then some bad vibration resonance kicked in and the performance dropped terribly :)
Also remember the demo from a Sun guy that showed how screaming to your RAID array had a significant impact on IO in real time (it was actually a dtrace demo): https://www.youtube.com/watch?v=tDacjrSCeq4
Someone ( in the storage industry) also told me of some crap RAID enclosure that had a normal performance until you added a drive in the center slot; then some bad vibration resonance kicked in and the performance dropped terribly :)