The raw value for "Unexpected Power Loss" and "Power-Off Retract Count (Unsafe Shutdown Count)" report the cumulative number of unsafe (unclean) shutdown events over the life of the device. An unsafe shutdown occurs whenever the device is powered off without STANDBY IMMEDIATE being the last command.
If the SMART counter is increasing every time the computer shuts down and with different OS's, it suggests that the SSD is not receiving the Standby immediate command at the end of the process.
Based on the Firmwware version of your drive, this an Intel® SSD Pro 1500 Series rebranded by an OEM. OEM SSD's have proprietary firmware and cannot be updated using Intel tools, we advise you to check with the Computer Manufacturer for firmware updates for you SSD, since it may help with this condition.
We would like to mention that under these circumstances the Unsafe power loss may not have any major effect on your drive.
Thanks for yr patient reply, Jonathan.
The problem is I do not know its OEM Manufacturer.
I found this webpage http://ssd.userbenchmark.com/SpeedTest/12016/INTEL-SSDSCIHF120A4H which listed the test reports of the same SSD type of mine (ssdscihf120a4h) and indicated that all of them had a common problem as I have. Some of them had thousands of "Unexpected Power Loss" but still worked. They also had the same firmware version as mine. So, it looks that its firmware still has no update for years. Hence, The issue has no solution for now. Is it true?
This seems to be a minor compatibility issue between your drive and the computer. This may or may not be fixed with a Firmware update; just keep in mind that firmware updates for OEM SSD's have to be obtained from the Computer Manufacturer Support Websites since this type of drives are made according to the OEM's requirements, and in some cases are even designed to work in specific systems.
As you mentioned, the drive can work well with high counts of Unexpected Power Loss.
In some cases, OEM drives have markings on the sticker with the name of the vendor, if you prefer, you can Contact Support and engage one of our support agents for assistance.