X5 is a Thunderbolt 3 SSD - so I don't consider it here in the USB 3.2 Gen 2 category.
For T7, we only reviewed the 1TB capacity, so the only non-2TB ones are either the same X8 family or the SSDs launched within the last two months. FWIW, T7 didn't impress us too much: https://www.anandtech.com/show/16120/sandisk-extre...
What is the rated write endurance ? External SSDs are often used to transfer large amounts of data between machines - in this use case the TBW rating is important.
If it's not the main OS drive, it will probably last a lot longer, most SSD wear is the small temp files of the OS rather than file transfers.
Most drives are rated at hundreds of TB, standards are something like 100TB for every 250GB, and I doubt anyone would hit 4000 cycles within a few years, and by that point it should play nicely and be read only.
What I am more worried about is how long it can store data without being powered up, I have a couple of external HDD's that I haven't plugged in in years.
SSD and long term don’t belong in the same sentence. Guaranteed data integrity for NAND flash memory is measured in weeks. Hard drives are measured in months, but can typically go years.
Our treasury found this out the hard way when the handful of laptops they bought with SSDs in them all failed to boot after sitting for 2 months. SSDs were fine, but the data integrity was not.
If you want long term cold storage and tape is not an option stick with writable blu rays or external HDDs and plug them in once every few months
For what it is worth, CrystalDiskInfo has had a bunch of updates since v8.3.2. There's a chance that the latest version (currently v8.8.9) might detect TRIM support on the X8.
At that point they will spend more hours requesting and examining many hard offers from exchanges to assemble a careful and exact financial plan. Given this time venture, it is commonplace for truly solid developers to be made up for their pre-development administrations. You can find an assortment of solutions to this inquiry; https://astorhomesbydesign.com.au/services/ interestingly, you feel great with the pay the manufacturer requests and with how they clarify their part in the pre-development measure for your task.
This is QLC flash - most QLC will not reach beyond 1000 cycles - some will only reach a few hundred - the rated TBW IS important. Also the write speed on QLC often degrades as the cycle count increases.
I don't care slightest about write endurance - I have hard time envisioning a use case where this kind of drive is written to death. Even few hundred P/E cycles is a lot for a normal person. If you are not a "normal person" and your workload is heavy, then go and buy something else.
However, what I'd be very afraid is the data retention. QLC - drive being unplugged for reasonably long periods of time etc.
It is completely normal for people to take backups, transfer bunch of files etc. and expect them to be readable in half a year from writing after storing the drive in the glove compartment of their car or whatever crazy people do.
Ganesh - looking at the boxes in your picture they look pretty much banged up. Were these new or used drives that you tested here? I think you are an excellent writer.
"The emergence of 3D NAND with TLC and QLC has brought down the cost of such drives."
You meant:
The emergence of 3D NAND with TLC has brought down the cost of such drives. QLC, meanwhile, is about increasing margin for drive makers and decreasing quality for consumers."
"I don't care slightest about write endurance - I have hard time envisioning a use case where this kind of drive is written to death. Even few hundred P/E cycles is a lot for a normal person. If you are not a "normal person" and your workload is heavy, then go and buy something else. However, what I'd be very afraid is the data retention. QLC - drive being unplugged for reasonably long periods of time etc."
Drive death in the consumer realm has always been mainly about firmware/controller bugs (or, possibly defective NAND), not the NAND wearing out through use. The most extreme examples I can think of are the Sandforce 2 controllers from OCZ that bricked drives when OCZ switched to 64-bit planar MLC (without telling anyone) and Intel's G2 drive that had a data corruption problem due to bad firmware.
(The Sandforce problem was never solved by a plethora of firmware patches. OCZ pretended that it solved the issue by letting people return the drives but the people who spent the most money (on the highest capacity drives, the 240 GB ones) were not allowed to return them! I have three bricked 240 GB OCZ drives. Two of them are drives OCZ sent when the first ones bricked.)
The differences between things like planar MLC and planar TLC have been about other problems. Planar TLC from Samsung didn't result in drive death (the red herring everyone talks about). Instead, it was voltage drift that caused the data to have to be constantly rewritten as a kludge "solution" to very poor performance. That much more frequent writing slows performance, makes one question the safety of storing the drive powered off for long periods, and can lead to the NAND wearing out I suppose.
Drive death from worn-out NAND has been a red herring for the most part, while other serious drawbacks to increasing the number of voltage states (by adding layers) have been whitewashed. Well, it looks like QLC brings back the drive death from worn-out NAND problem back a bit while having all of the drawbacks of there being so many more voltage states (which increases the problem of drift drastically).
The only things going for it is that it's 3D instead of planar and that capacities have increased which helps to mask the issue for most consumer workloads. Regardless, I consider QLC to be an unsatisfactory solution to a problem consumers didn't face: how to increase margin for the companies selling drives beyond what 3D TLC offers. That's the real driving force being QLC. It is not giving consumers a much better capacity deal for their money. The economy of scale factor, instead, works against consumer value by increasing the price of 3D TLC. Companies use that as an excuse to keep prices of QLC too high. Neat trick, for as long as they can make it last. By winding down TLC capacity, they can do it for as long as they like, so long as no one decides to fight the current and keep high volume TLC production going and reasonable pricing for it (in defiance of the scarcity dynamic).
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It is seen as that getting changed applications is very irksome in iOS, yet iOSEmus simplified this dazzling. It has a whole library of the https://iosemus-app.com/ relative multitude of top notch applications that can fulfill you truly particularly perky. Do whatever it takes not to confide in me? I BET you should endeavor this.
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mostlyfishy - Wednesday, October 21, 2020 - link
UASP and TRIM support mean these look good for a boot device on the Raspberry Pi 4s!Meteor2 - Monday, October 26, 2020 - link
Why would you pair a $35 SBC with a $300 SSD?MartenKL - Wednesday, October 21, 2020 - link
No Samsung T7 or X5 in the comparison?ganeshts - Wednesday, October 21, 2020 - link
X5 is a Thunderbolt 3 SSD - so I don't consider it here in the USB 3.2 Gen 2 category.For T7, we only reviewed the 1TB capacity, so the only non-2TB ones are either the same X8 family or the SSDs launched within the last two months. FWIW, T7 didn't impress us too much: https://www.anandtech.com/show/16120/sandisk-extre...
Duncan Macdonald - Wednesday, October 21, 2020 - link
What is the rated write endurance ? External SSDs are often used to transfer large amounts of data between machines - in this use case the TBW rating is important.wrkingclass_hero - Wednesday, October 21, 2020 - link
Probably the most important spec... if it can only be filled 600 times that's a serious issue.RSAUser - Thursday, October 22, 2020 - link
If it's not the main OS drive, it will probably last a lot longer, most SSD wear is the small temp files of the OS rather than file transfers.Most drives are rated at hundreds of TB, standards are something like 100TB for every 250GB, and I doubt anyone would hit 4000 cycles within a few years, and by that point it should play nicely and be read only.
What I am more worried about is how long it can store data without being powered up, I have a couple of external HDD's that I haven't plugged in in years.
Meteor2 - Monday, October 26, 2020 - link
I too would like to know how stable SSDs are unpowered long-term.TheinsanegamerN - Monday, October 26, 2020 - link
SSD and long term don’t belong in the same sentence. Guaranteed data integrity for NAND flash memory is measured in weeks. Hard drives are measured in months, but can typically go years.Our treasury found this out the hard way when the handful of laptops they bought with SSDs in them all failed to boot after sitting for 2 months. SSDs were fine, but the data integrity was not.
If you want long term cold storage and tape is not an option stick with writable blu rays or external HDDs and plug them in once every few months
MrCommunistGen - Thursday, October 22, 2020 - link
For what it is worth, CrystalDiskInfo has had a bunch of updates since v8.3.2. There's a chance that the latest version (currently v8.8.9) might detect TRIM support on the X8.luxuryhousebuild - Wednesday, June 23, 2021 - link
At that point they will spend more hours requesting and examining many hard offers from exchanges to assemble a careful and exact financial plan. Given this time venture, it is commonplace for truly solid developers to be made up for their pre-development administrations. You can find an assortment of solutions to this inquiry; https://astorhomesbydesign.com.au/services/ interestingly, you feel great with the pay the manufacturer requests and with how they clarify their part in the pre-development measure for your task.Duncan Macdonald - Thursday, October 22, 2020 - link
This is QLC flash - most QLC will not reach beyond 1000 cycles - some will only reach a few hundred - the rated TBW IS important. Also the write speed on QLC often degrades as the cycle count increases.zepi - Thursday, October 22, 2020 - link
I don't care slightest about write endurance - I have hard time envisioning a use case where this kind of drive is written to death. Even few hundred P/E cycles is a lot for a normal person. If you are not a "normal person" and your workload is heavy, then go and buy something else.However, what I'd be very afraid is the data retention. QLC - drive being unplugged for reasonably long periods of time etc.
It is completely normal for people to take backups, transfer bunch of files etc. and expect them to be readable in half a year from writing after storing the drive in the glove compartment of their car or whatever crazy people do.
Is the data readable after such period? No idea.
AMDSuperFan - Thursday, October 22, 2020 - link
Ganesh - looking at the boxes in your picture they look pretty much banged up. Were these new or used drives that you tested here? I think you are an excellent writer.Oxford Guy - Monday, October 26, 2020 - link
"The emergence of 3D NAND with TLC and QLC has brought down the cost of such drives."You meant:
The emergence of 3D NAND with TLC has brought down the cost of such drives. QLC, meanwhile, is about increasing margin for drive makers and decreasing quality for consumers."
Oxford Guy - Monday, October 26, 2020 - link
"I don't care slightest about write endurance - I have hard time envisioning a use case where this kind of drive is written to death. Even few hundred P/E cycles is a lot for a normal person. If you are not a "normal person" and your workload is heavy, then go and buy something else. However, what I'd be very afraid is the data retention. QLC - drive being unplugged for reasonably long periods of time etc."Drive death in the consumer realm has always been mainly about firmware/controller bugs (or, possibly defective NAND), not the NAND wearing out through use. The most extreme examples I can think of are the Sandforce 2 controllers from OCZ that bricked drives when OCZ switched to 64-bit planar MLC (without telling anyone) and Intel's G2 drive that had a data corruption problem due to bad firmware.
(The Sandforce problem was never solved by a plethora of firmware patches. OCZ pretended that it solved the issue by letting people return the drives but the people who spent the most money (on the highest capacity drives, the 240 GB ones) were not allowed to return them! I have three bricked 240 GB OCZ drives. Two of them are drives OCZ sent when the first ones bricked.)
The differences between things like planar MLC and planar TLC have been about other problems. Planar TLC from Samsung didn't result in drive death (the red herring everyone talks about). Instead, it was voltage drift that caused the data to have to be constantly rewritten as a kludge "solution" to very poor performance. That much more frequent writing slows performance, makes one question the safety of storing the drive powered off for long periods, and can lead to the NAND wearing out I suppose.
Drive death from worn-out NAND has been a red herring for the most part, while other serious drawbacks to increasing the number of voltage states (by adding layers) have been whitewashed. Well, it looks like QLC brings back the drive death from worn-out NAND problem back a bit while having all of the drawbacks of there being so many more voltage states (which increases the problem of drift drastically).
The only things going for it is that it's 3D instead of planar and that capacities have increased which helps to mask the issue for most consumer workloads. Regardless, I consider QLC to be an unsatisfactory solution to a problem consumers didn't face: how to increase margin for the companies selling drives beyond what 3D TLC offers. That's the real driving force being QLC. It is not giving consumers a much better capacity deal for their money. The economy of scale factor, instead, works against consumer value by increasing the price of 3D TLC. Companies use that as an excuse to keep prices of QLC too high. Neat trick, for as long as they can make it last. By winding down TLC capacity, they can do it for as long as they like, so long as no one decides to fight the current and keep high volume TLC production going and reasonable pricing for it (in defiance of the scarcity dynamic).
happythanksgives - Tuesday, November 10, 2020 - link
Clearly, your Thanksgiving menu is critical, yet the event is a long ways past essentially stacking our plates. Thanksgiving is an occasion to exhibit your gratefulness for your partners, family, and all that you have for the duration of regular daily existence https://happythanksgiving2020.com/ . These true Thanksgiving proclamations will assist everyone with recollecting the clarification behind the season. This overview is overflowing with clever words that would make for an exceptional event toast or even as a respectable Thanksgiving engraving through online systems administration media.Henry jones - Monday, November 23, 2020 - link
I guess there is no need to compare 35$ product with the expensive onehttps://ynntechnology.com/product/dry-ice-machine/
iOSEmusapps - Monday, March 15, 2021 - link
It is seen as that getting changed applications is very irksome in iOS, yet iOSEmus simplified this dazzling. It has a whole library of the https://iosemus-app.com/ relative multitude of top notch applications that can fulfill you truly particularly perky. Do whatever it takes not to confide in me? I BET you should endeavor this.mp3pawtv - Monday, July 5, 2021 - link
Mp3Paw Download Free Mp3 Music in High Quality – Can I download free MP3 Music from MP3PAW or how might I will download Free films from MP3paws? https://mp3paw.tv/ Here in this article, you would have the option to gain proficiency with a ton about the mp3 paw download and furthermore how to get to the mp3paw download page to download the decisions of your Mp3 music melodies.govtjobsiti - Saturday, November 13, 2021 - link
Still, you must have encountered one veritably troubling but important question, i, If you're a pupil who's either planning to pursue or is formerly pursuing ITIcourses.e.,‘What are the career prospects after ITI?’ Moment, chops of a professional matter as much as their academic degree. To eclipse that, colorful government programmes similar as Skill India are also pushing to empower the youth of the country with skill sets which make them more exploitable and more productive in their work terrain. https://www.itijobs.co/ Thus, scholars who have experienced training at the Industrial Training Institutes (ITI) across India, have excellent career openings ahead of them.govtjobsiti - Monday, November 29, 2021 - link
Get all the latest Government & Private ITI vacancy 2021 and most important ITI Jobs Beta notification in Hindi on our website. students can also Get all https://iticampus.co/, Exam Alerts, Sarkari Naukri Notification here. Students can also Download Admit cards, latest ITI Jobs Beta results, ITI Jobs Beta , sarkari naukri, sarkari rojgar, rojgar result, Admit Card, Latest Jobs, Results, ITI Govt Jobs, in various sectors such as Railway, Navy, https://www.itijobs.co/government-jobs/hal-recruit... UPPSC, Army, Police, https://www.itijobs.co/government-jobs/ecil-recrui... and more free government & Private jobs alert only at one place.