Question SSD 98% health

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HDD is totally different than SSD.

In the first few days/weeks of using an SSD (or any new drive) you do a LOT more writes than later.

You are looking at a single snapshot in time.
Check this once a week. Then, once a month.
Document the results, make a graph over time.

And....what specific drive is this?
 
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USAFRet said:
HDD is totally different than SSD.

In the first few days/weeks of using an SSD (or any new drive) you do a LOT more writes than later.

You are looking at a single snapshot in time.
Check this once a week. Then, once a month.
Document the results, make a graph over time.

And....what specific drive is this?
Click to expand...
Well.. normally I know that SSd's health might be around 97% after many months of usage..not in the first 5 days I found that the health is already 99%!!

and it's
Kingston 240GB A400 Sata 3 2.5 inch Internal Ssd Sa400S37,240G
 
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Mohanad9555 said:
Well.. normally I know that SSd's health might be around 97% after many months of usage..not in the first 5 days I found that the health is already 99%!!
Click to expand...
There is no "normally".

One of my SATA III drives:
SanDisk, 1TB.
30,582 hours, almost 24/7 use since Dec 2018...CrystalDiskInfo Says 99%

Indeed, ALL of the 6 drives in this system...either 99% or 100%.
None of them less than 9 months old.


Monitor that number over weeks/.months.
A single snapshot in time is useless.
 
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USAFRet said:
There is no "normally".

One of my SATA III drives:
SanDisk, 1TB.
30,582 hours, almost 24/7 use since Dec 2018...CrystalDiskInfo Says 99%

Indeed, ALL of the 6 drives in this system...either 99% or 100%.
None of them less than 9 months old.


Monitor that number over weeks/.months.
A single snapshot in time is useless.
Click to expand...
So I get from you that it's okay that my SSD is 98% health after 15 days? right?
 
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I don't know which Kingston document is appropriate, but I found this one:

https://media.kingston.com/support/downloads/MKP_521_Phison_SMART_attribute.pdf

Attribute 231 (SSD Life Left) is calculated according to this formula:

100 - ((average erase count / rated PE)(100))​

Basically it is counting the average number of Program/Erase cycles for each block. If the rated number of P/E cycles is 1000, then this attribute is saying that the SSD has been erased 20 times. Actually it would be somewhere between 10 and 30 since we don't know whether the value has just recently clicked over from 99% or is just about to click over to 97%.

Attribute 244 is the Average Erase Count, and its value is 0x19 (= 25 decimal). This seems to be consistent with attribute 231. If we multiply this value by the full capacity of the drive (256GiB), the total writes to flash would be around 7TB.

Attribute 233 is Lifetime writes to Flash in Gigabytes, which is now 0x505 (= 1285 decimal). That's only 1.3TB. Therefore attributes 233 and 244 appear to be inconsistent.

Attribute 241 is reporting that the total amount of data written by the host is 1436 GB (= 0x59C), ie 1.5TB.

In short, the SMART attributes don't make complete sense to me. I feel that some have been incorrectly identified, or maybe I have overestimated the rated P/E cycles. Or maybe the life is calculated on the basis of TBW rather than P/E cycles?
 
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fzabkar said:
I don't know which Kingston document is appropriate, but I found this one:

https://media.kingston.com/support/downloads/MKP_521_Phison_SMART_attribute.pdf

Attribute 231 (SSD Life Left) is calculated according to this formula:

100 - ((average erase count / rated PE)(100))​

Basically it is counting the average number of Program/Erase cycles for each block. If the rated number of P/E cycles is 1000, then this attribute is saying that the SSD has been erased 20 times. Actually it would be somewhere between 10 and 30 since we don't know whether the value has just recently clicked over from 99% or is just about to click over to 97%.

Attribute 244 is the Average Erase Count, and its value is 0x19 (= 25 decimal). This seems to be consistent with attribute 231. If we multiply this value by the full capacity of the drive (256GiB), the total writes to flash would be around 7TB.

Attribute 233 is Lifetime writes to Flash in Gigabytes, which is now 0x505 (= 1285 decimal). That's only 1.3TB. Therefore attributes 233 and 244 appear to be inconsistent.

Attribute 241 is reporting that the total amount of data written by the host is 1436 GB (= 0x59C), ie 1.5TB.

In short, the SMART attributes don't make complete sense to me. I feel that some have been incorrectly identified, or maybe I have overestimated the rated P/E cycles. Or maybe the life is calculated on the basis of TBW rather than P/E cycles?
Click to expand...
Well.. I think what u did say there is very mathmatics hahaha.... I didn't understand a lot but what I get from you that maybe the program has wrong readings or am I missing something
 
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What are you using the drive for and how full is it? Is TRIM enabled and functioning? You could try running CrystalDiskInfo to see if it can interpret the information more clearly. I've seen some controllers (mainly Realtek) that report SMART data in confusing and sometimes inaccurate ways. Somehow, CrystalDiskInfo was better able to make sense of things. If these values are accurate, 1.5TB of writes is quite a lot for such a short time and such a small drive. Something would have to be going really write crazy. It's hard to make a judgement without knowing how they drive's being used.

As for the HD, it's showing 100% because they don't wear out in the same way as an SSD. Hard drives tend to be either good, concerning, or bad. The NAND in an SSD has a more quantifiable life expectancy, not that they'll likely fail when the life remaining reaches 0%.
 
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MWink64 said:
What are you using the drive for and how full is it? Is TRIM enabled and functioning? You could try running CrystalDiskInfo to see if it can interpret the information more clearly. I've seen some controllers (mainly Realtek) that report SMART data in confusing and sometimes inaccurate ways. Somehow, CrystalDiskInfo was better able to make sense of things. If these values are accurate, 1.5TB of writes is quite a lot for such a short time and such a small drive. Something would have to be going really write crazy. It's hard to make a judgement without knowing how they drive's being used.

As for the HD, it's showing 100% because they don't wear out in the same way as an SSD. Hard drives tend to be either good, concerning, or bad. The NAND in an SSD has a more quantifiable life expectancy, not that they'll likely fail when the life remaining reaches 0%.
Click to expand...
Im using it for my OS and it's 32.1 gb free of 223gb

What is the TRIM? and what does it do? and how to enable it

And this is what I get in CrystalDiskInfo

https://ibb.co/HGV12xD
ibb.co

Desktop-Screenshot-2022-09-23-00-36-24-97 hosted at ImgBB

Image Desktop-Screenshot-2022-09-23-00-36-24-97 hosted in ImgBB
ibb.co ibb.co
 
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