This value is related to attribute 5 (Reallocated Sector Count) and will vary based on SSD density. This attribute represents the number of reserved blocks that have been used as a result of a read, program or erase failure. Common CrystalDiskInfo Data Points That Should Give You ‘Caution’, There are 3 common errors that will set off CrystalDiskInfo to issue a warning about your hard drive’s health, so let’s jump into these and figure out exactly what each one means. ID #179 Used Reserved Block Count (total) Every write to an SSD slightly reduces its life expectancy, some drives have a SMART parameter Percent lifetime remaining. The raw value of this attribute shows the total count of P/E Cycles. This value is directly related to the lifetime of the SSD. This attribute represents the number of media program and erase operations (the number of times a block has been erased). 1st SSD from Samsung shows 0xB3, while it should have been 0xB1, or a weighted sum of the two. The health status percentage for SSD is intended to show the remaining life while in implementation it is just the calibrated percentage of a reference smart attribute chosen by CrystalDiskInfo (see official manual) which is specific to the SSD brand.īoth 2nd and 3rd SSD from Crucial show percentage of 0xAD attribute.

Crystaldiskinfo ssd health percentage