Anyone know why the endurance rating is the same for all sizes? Usually the larger the disk the higher the number or writes per day it will support.
We are looking at purchasing some 1.2TB devices for a write through read cache solution. Plan was to increase the overcommit so we are only using 1TB
The way the cache solution works means that the data isn't important, if it fails it will be read from another source, but we were hoping to get a bit more than 70GB a day. I appreciate we should get more anyway as the endurance is often conservative, but I would expect the 1.2TB drives to have a higher endurance specification, maybe not 3X the 400GB devices but even 1.5X (105GB per day) would be a step in the right direction.
Just wondering why intel are sticking with the same specification for the entire range
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 http://www.intel.com/content/dam/www/public/us/en/documents/product-specifications/ssd-750-spec.pdf 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 http://www.intel.com/content/www/us/en/solid-state-drives/data-center-family.html 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.
http://ark.intel.com/# @SolidStateDrives ARK | Your Source for Intel® Product Specifications
seems there is an error in the spec pdf of the 750 1.2TB because endurance is only 127TBW (which means 30 hours at 1.2GB/S). If it's 70GB / day on 5 years, it should be 127PBW ?
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.