Buzz
SSDs have become increasingly popular, and the decision to purchase an SSD is also on the rise. Do you know all the specifications of an SSD? What is DWPD? What about TBW? There's a very simple way to become an expert in choosing SSDs, which is to regularly follow articles introducing SSDs on Mytour, such as this one.
DWPD or TBW are often overlooked when we choose SSDs, but they are the most important specifications, indicating the durability of the SSD. However, few people pay attention to what DWPD is, what TBW is used for, and how they relate to SSDs.
What is DWPD? How to calculate daily writes on an SSD drive
What is DWPD?
DWPD stands for Drive Writes Per Day, meaning the amount of data written to a drive daily. It uses the TBW specification of the drive to calculate how much capacity can be written each day based on the product's warranty period.
DWPD and TBW are closely related, and these two parameters will help you estimate the approximate lifespan of your SSD.
Calculating daily writes on an SSD drive
To calculate the daily writes on an SSD drive, we need to know the TBW (Total Bytes Written) of the SSD, the manufacturer's warranty period in years, and the capacity of the drive.
The formula is:
DWPD = (TBW * 1000) / (365 * Warranty Years * SSD capacity).
Example: My Kingston SSD has a capacity of 1.8 TB (1800 GB) with a 5-year warranty or 1432 TBW. Substituting into the formula:
DWPD = (1432 * 1000) / (265 * 5 * 1800 GB).
The result is 0.43 (approximately 774 GB), meaning 43% of the capacity of the 1800 GB drive.
What does this parameter signify?
So, what does 43% equivalent to 774 GB signify? Put simply, if your daily TBW data write is 774 GB, you can utilize the aforementioned drive continuously for 5 years. However, in reality, with personal usage, we typically fluctuate around 40 - 60 GB / day, so it will be a long time before your SSD fails with this type of usage.
Through the article, we've gained a better understanding of what DWPD is and how to calculate it, an important parameter that few pay attention to on SSD drives. Additionally, in the article, you always see an abbreviation accompanying DWPD, which is TBW. So, what exactly is TBW and what is its specific function? Check out the article
to delve further into this matter.
