News Enthusiast mods a 512GB QLC SSD into a 120GB SLC SSD — endurance and performance benefits charted

[Admin]

A computer engineer and tech enthusiast has converted his Crucial BX500 512 GB SSD from quad-level cell to single-level cell NAND, reducing capacity to 120GB in the process. Then he checked for endurance and performance benefits.

Enthusiast mods a 512GB QLC SSD into a 120GB SLC SSD — endurance and performance benefits charted : Read more

 

[bolweval]

Sounds like Ferraz may have a job offer in his future..

 

[edzieba]

I'd be immensely sceptical of 'endurance' figures generated by projecting P/E cycles rather than from actual accelerated wear testing.

 

[jabliese]

Yes! One step closer to putting jumpers back on drives! Do you want the low capacity/long life version of the drive or the high capacity/less life one?

 

[Dementoss]

Interesting but, why not just buy an SSD appropriate for your needs?

 

[slightnitpick]

Interesting but, why not just buy an SSD appropriate for your needs?

Find a modern, new SLC SSD drive for us, please.

 

[evdjj3j]

Yay, another article with a link to a video of someone else's work. I hope Future pays these people for their content.

 

[AlB80]

SLC = 1 bit = 2 levels
QLC = 4 bits = 16 levels
512GB / (16/2) = 64GB SLC
Is this story true?

 

[GabrielFerrazTPU]

Sounds like Ferraz may have a job offer in his future..

hahahahahah i Certainly hope so man

 

[GabrielFerrazTPU]

I'd be immensely sceptical of 'endurance' figures generated by projecting P/E cycles rather than from actual accelerated wear testing.

it was just an estimative. Real world endurance could be lower because of WAF and the pSLC endurance is hardly close to its maxium in these lower endurance dies.

 

[GabrielFerrazTPU]

Find a modern, new SLC SSD drive for us, please.

Kioxia FL6 uses XL-Flash Gen2 which is Native SLC, not a QLC or TLC in pSLC mode, that XL-Flash is native SLC using a 256Gb die in 96-LAyers with 16 Planes.

Also, Solidigm has many drives using the Intel N38A 144-Layers QLC 1Tb running in pSLC mode as 256Gb SLC like in the D7-P5810

 

[GabrielFerrazTPU]

Yay, another article with a link to a video of someone else's work. I hope Future pays these people for their content.

well honestly i doubt that, but i'm happy people are watching from other countries, so far i've only done 2 videos in english and both so far are going viral

 

[GabrielFerrazTPU]

SLC = 1 bit = 2 levels
QLC = 4 bits = 16 levels
512GB / (16/2) = 64GB SLC
Is this story true?

No, SLC is in fact 2 levels and QLC is 16 leves, but QLC uses 4 bits per cell, since each cell has 4 values. So thats why the capacity is 1/4th instead of 1/8th or 1/16th

 

[Amdlova]

You can find Cheap 22110 drivers mixed loads on ebay with some pushing over 3Pb of endurance
got one Toshiba XD5 1.92tb 85us! and another 7us for a 22110 heatsink. the ssd is brand new

 

[slightnitpick]

You can find Cheap 22110 drivers mixed loads on ebay with some pushing over 3Pb of endurance
got one Toshiba XD5 1.92tb 85us! and another 7us for a 22110 heatsink. the ssd is brand new

3PB on a 1.92 TB SSD is on the order of just over 1500 P/E cycles, or between typical TLC and QLC published endurance. The point of this experiment was partially to get better endurance than that.

 

[HaninTH]

Being a Crucial drive, I'd be more worried about non-NAND components dying way before you ever get anywhere near the wear life of the NAND.

In my experience with Crucial drives, they seem to die randomly when put in 24-7 usage. Does not even need to have high load/usage. It can be just sitting idle, and will die. Capacitors seem to be the biggest issue, but out of a batch of 200 Crucial SSDs, we have a good 30% of them fail this way in 6-10 months of usage. Caused a huge issue at the MSP I was working at at the time.

But then again, I suppose this could affect any of them.

 

[Eximo]

If you go through electronics suppliers you can still order SLC drives. They aren't large, and they aren't fast, but for mission critical reliability (some are rated for quite a wide temperature range) they are still out there. Not cheap though.

 

[einheriar]

Interesting but, why not just buy an SSD appropriate for your needs?

It would be great to use such a thing as a cache or scratch drive to your nas with HDDs when you have a high utilisation.. ..

It's what the intel SLC drives are being used for.

 

[Pierce2623]

It would be great to use such a thing as a cache or scratch drive to your nas with HDDs when you have a high utilisation.. ..

It's what the intel SLC drives are being used for

As far as I’m concerned SSDs have gotten cheap enough to just store everything on NAND instead of HDDs with sort of NAND based caching like you’re implying.