Work out ssd endurance (tbw) instantly with clear inputs, formula shown and shareable results.
SSD endurance is quoted as terabytes written or drive writes per day over the warranty. What matters is writes reaching the flash, which is host writes multiplied by write amplification — filesystem journaling, RAID parity and the drive's own garbage collection all inflate it. Dividing the TBW rating by that figure gives the real service life.
SSD endurance
flash writes per day = host writes x amplification; life = TBW / daily flash writes; DWPD required = daily flash writes / (capacity x warranty days)
Around 1.1 to 1.5 for large sequential writes, and 2 to 5 for small random writes on a nearly full drive. Overprovisioning reduces it substantially.
Yes. Less free space means garbage collection must relocate more valid data per erase block, which raises write amplification sharply.