We understand your question of why the Endurance Rating is set as 5 years assuming a client workload of up to 70 GB of host writes per day. This is for all the Intel® SSD 750 Series models, regardles of the size of the drive. We will check on this and will provide further updates soon.
I would like to mention a very important fact based on your description of the environment.
- The Intel® SSD 750 Series is a consumer drive designed for performance, even though it may exceed the reliability specs of other comparable drives, it is not meant to be used for write-intensive usage nor Data Center Environments.
- Since you plan to use the SSD as a cache drive for a bussiness system, we would advise to consider a drive of the Intel® SSD Data Center Family for NVMe*, that are designed for read- and write-intensive storage workloads, at predictable rates for absolutely smooth data center operation. Currently, there are different PCIe* NVMe* series that exceed the endurance rating you would get with the 750. For example: Intel® SSD DC P3500 Series, Intel® SSD DC P3600 Series, Intel® SSD DC P3608 Series and Intel® SSD DC P3700 Series.
We double checked the Endurance Rating value and the specification document has the correct one.
If the drive can endure 70 GB host writes per day, for 5 years, and the year has 365 days, then: 70 x 365 x 5 = 127 750 GB.
Then 127 750 GB equals to 127.75 TB. (Considering that 1PB = 1015 bytes).
Please keep in mind that the advertised performance is based on international testing standards, however, we would expect our SSDs to exceed these values in most cases.