For the long term performance stability test, we set the drive up to run a 20-minute 4K random test with a 30% write, 70% read split, at a Queue Depth of 256 over the entire disk. The 8TB Intel DC P4510 averaged 196,503 IOPS for the test with a performance stability of 98.52%.
A performance stability figure of 98% and above is what should be expected or indeed demanded of a drive in the mission critical environment of a data centre.