[video] SSD Data Integrity and Longevity

[kingozrecords]

Man, a nice cheap platinum power supply. I can't wait till mine arrives. I'm sure other readers of this post are thinking the same thing. Hot dog .

[jdnz]

I had to deal with servers in the past. I don't want to join this discussion or have read all posts, but an UPS does not cover all cases where a PLP of an SSD jumps in. It may be enough for 90% of the people out there, but it's not a replacement. Even hard resets after a crash can create a PL for an SSD sometimes. Whether a PLP has happened in the past is easy to check via SMART. Most good ssds are pretty robust against corruption of data at rest nowadays, but for database usage there is still a chance that you get corruption when a write command is just lost.

A good overview about the topic https://www.kingston.com/unitedstates/u ... protection

absolutely - indeed with critical infrastructure it’s a case of “am I being paranoid ENOUGH” - so we have servers with UPS backup, plus the critical drives are enterprise grade SSDs (we will use consumer level ones for scratch storage as the $/tb is about 1/2 the enterprise equiv - we don’t care if data on scratch disks persists across a reboot) and for really critical stuff redundant powersupplies as well. For really big/super critical stuff we’re talking about not only redundant/HA servers, but redundant datacentres at separate physical locations

[jdnz]

If you were to look at the efficiency at 10-20-30% in a bronze power supply, you'd realize that the efficiency was 60-70% (though they say "80+") or maybe a bit more. And basically if you look at it, that's really only the difference of a few volts versus full load. Why don't they share with us this valuable info?

you’re totally missing the main point of using high-efficiency powersupplies, and that is the issue of waste heat. If a powersupply is 60% efficient and I want 600W of usable power out of it, that means it will be consuming 1000w, and generating 400w of waste heat. That heat has to go somewhere - now in the case of a single PC in a room it probably doesn’t matter, but when you start to scale up it becomes a major issue

it’s why our server room has 65kw of cooling, and any effiicency increase in the PSUs shows up directly in our power bill.

it’s the same reason to move away fron enterprise sized spinning rust arrays for storage - the speed increase is nice, but the improvements in both power consumption AND physical space used to house them are the big drivers

[kingozrecords]

If you were to look at the efficiency at 10-20-30% in a bronze power supply, you'd realize that the efficiency was 60-70% (though they say "80+") or maybe a bit more. And basically if you look at it, that's really only the difference of a few volts versus full load. Why don't they share with us this valuable info?

you’re totally missing the main point of using high-efficiency powersupplies, and that is the issue of waste heat. If a powersupply is 60% efficient and I want 600W of usable power out of it, that means it will be consuming 1000w, and generating 400w of waste heat. That heat has to go somewhere - now in the case of a single PC in a room it probably doesn’t matter, but when you start to scale up it becomes a major issue

it’s why our server room has 65kw of cooling, and any effiicency increase in the PSUs shows up directly in our power bill.

it’s the same reason to move away fron enterprise sized spinning rust arrays for storage - the speed increase is nice, but the improvements in both power consumption AND physical space used to house them are the big drivers

Yes, that's exactly what I meant, exactly. PSU transient filters, metal oxide varistors, apfc and what not. What I meant by what you quoted was is that is exactly as you said wasted heat. But ultimately it's just as bad as voltage ripple; it's still going to tax the capacitors and cause them to work twice as hard which is why the heat is created.

It's what the term efficiency refers to. Funny how they say heavier isn't better because the solid state would likely have more longevity but I wonder if they also got hotter. I have nothing around to test the theory.

But the link I provided was for a platinum model, and not for bronze; so where are you going with this? I was from the very beginning against the use of any grade less than platinum.