this post was submitted on 25 Sep 2024
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Hey, remember me ?

I posted about some entreprise SSDs here before, and now I made a full blog post about their insides! With even more pictures!

I hope you enjoy it :)

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[–] [email protected] 30 points 1 month ago (2 children)

Crikey. I have to wonder what that ~2TB unit must have cost in 2016.

Interesting that the one has such large capacitors in it. I imagine that is as last-ditch effort to keep the board powered long enough to finish flushing all of its caches in the event of a power failure.

[–] [email protected] 27 points 1 month ago* (last edited 1 month ago)

Interesting that the one has such large capacitors in it. I imagine that is as last-ditch effort to keep the board powered long enough to finish flushing all of its caches in the event of a power failure.

That's exactly the point of power loss protection (aka PLP.) As a side effect of not needing to wait for a flush after a write synchronous write workloads are dramatically faster on enterprise drives with PLP.

Edit: To add a bit of detail - you don't need to wait for a flush after a synchronous write with PLP because the drive firmware can lie and immediately return from a flush call because there's enough backup power to complete that flush if the power were cut.

[–] [email protected] 9 points 1 month ago (1 children)

I don't even want to think about prices ahah, I could have done some research and talked about it on the article tho...

And yeah that is probably why

[–] [email protected] 4 points 1 month ago

I can only conjecture it must have cost a mint.

[–] [email protected] 3 points 1 month ago

Yes, some chips (or rather parts of all chips) are spare on enterprise SSDs. You can even see how much is left via smart data

[–] [email protected] 3 points 1 month ago
[–] [email protected] 2 points 1 month ago (1 children)
[–] [email protected] 1 points 1 month ago