Factory Reliability Tests
There are several reliability tests by sampling audit of HDD to predict customer quality and at least meet the product specification & warranty.
Short term prediction (about one days)
Outgoing Dppm Test to predict integration test at customers , such as power cycles,sequential and random write/read,etc
Long term prediction (about 4-6 weeks)
Ongoing Reliability Test to predict field quality at end users to ensure our quality per our design or warranty,on workload,power on hour performance ,etc
Process control(about 3-4 hour)
Out of box audit to ensure our process and material quality in control,such as a short drive function verification , transfer rate ,etc
Stress reliability of product maturity (depends on tests)
Ensure our quality per the specification in aggressive environment,such as hot-cold temperature ,atmosphere,shock environment,corrosion,l/UL etc .