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I built a computer 2 years ago to do some database cleanup. Part of the regular process is to restore a database from a compressed backup to a terabyte data fil

I built a computer 2 years ago to do some database cleanup. Part of the regular process is to restore a database from a compressed backup to a terabyte data file, it works fine on S750 but it always gets in thermal throttling on a Samsung Evo Plus 870, all with heatsinks and good airflow (rackmount case with many chassis fans). Restoring 1TB at 1.7GB/sec takes enough time to get into trouble and this is regular work done almost daily, not a test. I plan to build a second computer for this work, but this time with PCIe v4 SSDs; this is to expand capacity, not because I think it will have less problems or be faster overall, a throttled disk is painfully slow.

wtallis 6y ago
That doesn't sound like thermal throttling. That sounds like you're running out of SLC cache space and writing at TLC speed, minus the overhead of the drive flushing the SLC cache in the background while you're still writing more data. The solution is to get an enterprise drive, because they don't use SLC write caching and can usually sustain somewhat better write speeds as a result (plus, they're generally rated for more write endurance).
- AdrianB1 6y ago
  Except that the transfer speed and drive temperature are linked together, we checked many times. If I do the same operation on 2 drives from 2 vendors and one works just fine and the other one shows 15 degrees C more on the same workload that almost fills and entire drive, what has SLC to do with this?
  - wtallis 6y ago
    Without knowing exactly what two drives you're comparing, I can't give you a clear answer. But it still sounds like you're deciding that the temperature is the cause of the performance difference, without having any evidence to rule out the possibility that the your temperature and performance observations are two different consequences of an underlying hardware difference between the two different drives.
Daho0n 6y ago
So enterprise usage.

wtallis 6y ago

That doesn't sound like thermal throttling. That sounds like you're running out of SLC cache space and writing at TLC speed, minus the overhead of the drive flushing the SLC cache in the background while you're still writing more data. The solution is to get an enterprise drive, because they don't use SLC write caching and can usually sustain somewhat better write speeds as a result (plus, they're generally rated for more write endurance).

AdrianB1 6y ago
Except that the transfer speed and drive temperature are linked together, we checked many times. If I do the same operation on 2 drives from 2 vendors and one works just fine and the other one shows 15 degrees C more on the same workload that almost fills and entire drive, what has SLC to do with this?
- wtallis 6y ago
  Without knowing exactly what two drives you're comparing, I can't give you a clear answer. But it still sounds like you're deciding that the temperature is the cause of the performance difference, without having any evidence to rule out the possibility that the your temperature and performance observations are two different consequences of an underlying hardware difference between the two different drives.

Daho0n 6y ago

So enterprise usage.