03-14-2019 08:30 AM - edited 03-15-2019 09:04 PM
Intel RST (the AHCI driver provided by Intel) versions other than 12.9 would not get installed on Windows 10 on the previously mentioned Intel H77 chipset.
After installing them, I disabled the "Link Power Management" option in their control panel and rebooted as instructed there. This could possibly be the reason why Power On hours didn't rise as real-time hours, and a possible indirect reason why I was having issues with the drive's write amplification and consequently excessive NAND wear for the amount of writes performed by the Host.
I have not performed other changes for now (the P2P program is still active in "seeding" mode), but I've disabled the benchmarking program which was keeping the SSD actively working. In the next hours it should become clearer if this will solve the problem. If it will, this is still something that should be taken care of by the SSD (firmware), though.
EDIT: Unfortunately, that option did not result in any improvement in the behavior of the SSD.
03-18-2019 09:30 AM - edited 03-18-2019 10:02 AM
Unfortunately so far I haven't been able to determine any clear software cause to the very high write amplification phenomenon seen.
On the other hand, after collecting SMART attributes at a rate of 1/minute for a few days, it appears there is a correlation between write amplification and the Current Pending ECC Count. It seems unlikely to me that this is something that would be directly software-caused.
So, summing up what I have observed so far:
As a bonus, here are the latest SMART attributes from Crucial Storage Executive:
Wear leveling count increase for the past few logged days:
|Timestamp||Block wear-leveling Count||Host GiB written||GiB delta||Days delta||GiB/day|