SMART ID "FC" (252) is described on wikipedia as follows:
252 0xFC | Newly Added Bad Flash Block | The Newly Added Bad Flash Block attribute indicates the total number of bad flash blocks the drive detected since it was first initialized in manufacturing.[81] |
Samsung has not explained anything about this big problem.Since 0xFC / 252 is officially a "vendor specific" attribute, are there really any guarantees it means exactly the same thing on these current Samsung drives with the new firmware, as somebody somewhere on the Internet years ago determined it means on their possibly not even Samsung drive?
Not to defend Samsung or anything. I bought a 1TB 870 EVO myself a little less than a year ago which it seems I now need to return and hope for a non-defective replacement, and an eventual refund if the replacement turns out to have the same problem.
Samsung has not explained anything about this big problem.
We should suspect Samsung as much as possible.
Presumably The update to firmware "SVT02B6Q" is intended to fix our problem.
The addition of "FC" is of course also relevant.
"Total NAND Read Plane Count" is irrelevant to this problem.
It would be reasonable to interpret it as "Newly Added Bad Flash Block"
I suspect that they are trying to avoid RMT by replacing fatal values SMART ID "05" (Reallocated Sector Count) and "183" (Runtime Bad Block) with "FC".
I don't know.If the intention is to hide the existence of broken sectors from users, why have any externally visible counter for them at all? The drive could still internally keep track of them for remapping without ever telling the user anything about them. And why pick 0xFC for it when there's "prior art" of using this attribute number for a bad sector count?
It may be Reallocated before it becomes unreadable, and then retired as a bad block.They cannot hide the disks losing sectors forever anyway because eventually the user is going to notice that some files they stored earlier cannot be read anymore.
You said that early batch was the cause without any evidence.Sadly, an unproven claim doesn't become more well-founded by repeating it a lot.
You said that early batch was the cause without any evidence.
It has led many users in the wrong direction.
Do you have any data as to when it crossed 10 TB and failed, how many of them were from each capacity? (250GB, 500GB, 1TB, 2TB and 4TB.)TLDR: It usually happened when the Total Host Writes ≈ 10TB, most affected SSDs are manifactured in 2021 (so the eighth digit is mainly R), but there still exists a few cases in 2020 (i.e. the eighth digit is N) and January 2022 (i.e. the eighth digit is T, the ninth digit is 1)
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If you report your own post you can ask for permissions to be altered to allow editsIt was the best information i had at the time, according to the cases i saw. I would very much like to edit my first post for various reasons, but the forum doesn't allow it.
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This speculation comes from the observation of a large number of CDI screenshots, I do not yet have spare time to create a sheet for accurate statistics, but in general I don't feel a strong correlation with the capacity (almost all of the screenshots are somewhere between 7T - 15T). As well, the expression around 10T is not really precise, it is only an approximate confidence interval from my observation. I feel like it could be a little bit higher, but no more than 15T.Do you have any data as to when it crossed 10 TB and failed, how many of them were from each capacity? (250GB, 500GB, 1TB, 2TB and 4TB.)
This is on only 2021 ssd's, or are the 2022 ssd's still have this problem ? thxThis speculation comes from the observation of a large number of CDI screenshots, I do not yet have spare time to create a sheet for accurate statistics, but in general I don't feel a strong correlation with the capacity (almost all of the screenshots are somewhere between 7T - 15T). As well, the expression around 10T is not really precise, it is only an approximate confidence interval from my observation. I feel like it could be a little bit higher, but no more than 15T.
Also, this is only the data when the user found the problem and does not represent the amount when the failure started.
I have only collected 1 case from January 2022 so far, so it could be outlier. After this time point the problem might have been solved, however, Samsung does not have any official statement yet. Only time will tell.This is on only 2021 ssd's, or are the 2022 ssd's still have this problem ? thx
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Hi,This is on only 2021 ssd's, or are the 2022 ssd's still have this problem ? thx
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You could get an 860 evo instead.This is on only 2021 ssd's, or are the 2022 ssd's still have this problem ? thx
Thx, i have one other 870 4TB dated sept 2021, only just started using, like 3TB written to it so far, i reckon this will go bad also, also made in korea like others, i got accepted to rma others, but sent all info via link they give you, and says they contact you within 1 to 2 days, already been 3 days and nothing, is this normal ? thxI have only collected 1 case from January 2022 so far, so it could be outlier. After this time point the problem might have been solved, however, Samsung does not have any official statement yet. Only time will tell.
Yeh i might, or go with a different make all together, thxHi,
Avoid 870 evo.
Yeh i will look into them, i have a 850 that is 7 years old and my main ssd, and not one error on that, thxYou could get an 860 evo instead.
Please read my past posts.This is on only 2021 ssd's, or are the 2022 ssd's still have this problem ? thx
why are you ignoring my past posts?I have only collected 1 case from January 2022 so far, so it could be outlier. After this time point the problem might have been solved, however, Samsung does not have any official statement yet. Only time will tell.
Oh, i did not realise the problem was the firmware, thought it was the drives themselves, my 09 2021 drive i have only just started using, with latest firmware, so you saying that 09 2021 drive will hopefully be ok ? thxPlease read my past posts.
2022 ssd's have new firmware.
There is another issue with this new firmware, which is an increase in the SMART ID "FC" value.
"FC" is a value related to bad blocks according to wikipedia, so increasing this value may be a problem.
Perhaps even the new firmware doesn't fundamentally fix the problem.
why are you ignoring my past posts?
The problem is probably not resolved.
The root cause of the problem may lie in the drive itself.Oh, i did not realise the problem was the firmware, thought it was the drives themselves, my 09 2021 drive i have only just started using, with latest firmware, so you saying that 09 2021 drive will hopefully be ok ? thx