I recently installed an SSD and after a day, I noticed that there are a value on uncorrectable ECC count on smart. another day passed, the value increased .

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2 Answers

Your disk seems to be OK. I recommend to check SMART data with SMARTCTL. According to Sandisk SSD Dashboard / WD SSD Dashboard (in Windows), Attribute 234 is "Nand GB Written To SLC" . Your drive is TLC drive (i guess , number of values are same with my WD Rebranded Green SSD) This drive have SLC and TLC portions to extend drive endurance ( check that : ). So Attribute 234 is amount of data written to SLC portion of drive. You can check the picture below . i included values of my healty disk so you can compareAttribute list of TLC based Sandisk / WD SSD

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SMART is reporting that your drive is OK if that's your concern.

From a legal perspective, the term "S.M.A.R.T." refers only to a signaling method between internal disk drive electromechanical sensors and the host computer. Because of this the specifications of S.M.A.R.T. are entirely vendor specific and, while many of these attributes have been standardized between drive vendors, others remain vendor-specific.

S.M.A.R.T. implementations still differ and in some cases may lack "common" or expected features such as a temperature sensor or only include a few select attributes while still allowing the manufacturer to advertise the product as "S.M.A.R.T. compatible." Further muddying the waters is the fact the SMART was developed for magnetic media, prior to the release of Solid State Drives as I recall.

The most common usage known for ID 234 on SSD's appears to be Average erase count AND Maximum Erase Count but in your case with a Kingston Drive, it could also be a total count of sectors programmed based on the vendor specific information I was able to locate. It makes perfect sense to see this value rise. However, it's entirely feasible that what Kingston utilizes ID 234 for may vary between models as well. One thing you can be fairly certain of is that the drive won't throw a SMART error until that attribute goes outside the range determined by the manufacturer.

If you want specific information regarding your specific SSD. It's likely best to contact the manufacturer directly armed with your drives model number and firmware version.

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