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The Synology End Game

(lowendbox.com)
452 points amacbride | 4 comments | | HN request time: 0.717s | source
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M95D ◴[] No.45061719[source]
But self-building a NAS is still a problem, and I'm also talking about this [1] article from the same blog:

There are NO low power NAS boards. I'm talking about something with an ARM CPU, no video, no audio, lots of memory (or SODIMM slot) and 10+ SATA ports.

Sure, anyone can buy a self-powered USB3 hub and add 7 external HDDs to a raspbery, but that level of performance is really really low, not to mention the USB random disconnects. And no, port replicators aren't much better.

[1] https://lowendbox.com/blog/are-you-recyling-old-hardware-for...

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storus ◴[] No.45061794[source]
Why don't you look at Topton's N100 boards with 6x SATA, 2.5Gb LAN, PCIe slot for extra SATA ports and Jonsbo N3 NAS case with it? For $300 you'd have a way better NAS than anything Synology offers.
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M95D ◴[] No.45061961[source]
I think we have different definitions of what "low power" means.
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justincormack ◴[] No.45062000[source]
What do you want? The N100 is 6W in theory not sure if you can downclock it or how good the power control is. Problem below that is that is mostly mobile phone type CPUs and they dont have much IO. Drives in a NAS are going to consume a bit of power too so its not really clear how low you can go.
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M95D ◴[] No.45062171[source]
I want less power and more storage.

I want less than 10W idle for the whole system, maybe except HDDs, but even those will be in sleep much of the time. x86 boards are mostly ATX-powered and I don't think any ATX power source can go that low and still be efficient (not draw 20W while powering a 10W system).

And yes, mobile phone CPUs are good enough. I'm using a Turris Omnia now and Marvell 385 is OK, except I have to use an external DAS for hard drives which eats 10 times more than the Omnia with all drives sleeping.

If only the chinese didn't try to make good-for-everything-best-at-nothing ARM boards with lots of video outs, audio, discrete NIC and soldered wifi...

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storus ◴[] No.45063044[source]
HDPlex GaN power supply?

1 HDD consumes around 5-7W idle, so with 8 HDDs you get to 40-60W on HDDs alone (all idle); adding 6W with N100 seems like insignificant fraction. The moment you actually use any HDD the consumption per HDD shots up to 8-10W whereas N100 shots up to 14W so you end up with 64-80W from HDDs and 14W from N100. Why would you like to squeeze component that is the least important (CPU) while retaining lots of SATA HDDs as that's your priority? Optimizing the wrong thing? If you wanted to lower power, the easiest way is to replace HDDs with 16TB SATA SSDs, each consuming 0.08-2W. Then CPU might be a bottleneck.

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1. M95D ◴[] No.45064009[source]
There is power management for HDDs, you know...

For my typical usage, the hard drives are probably more than 80% in sleep mode. If I had more SATA ports, I could probably add a frequent-access cache on a SSD and then they would be 99% sleeping.

The drives I have, ST2000DL003, consume 0.5W in sleep, according to the spec sheet. So all 8 of them would consume ~4W.

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2. SirMaster ◴[] No.45068508[source]
If you care that much about power why are you using 8 tiny 2TB HDDs instead of 1 or 2 big HDDs?

You don't need a NAS for 16TB, you just need a RasPi with a 16TB USB HDD connected to it and a second one for backups that you keep mostly offline.

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3. M95D ◴[] No.45068857[source]
Because TCO is less with these cheap old drives and I can have RAID5 instead of just RAID1 or no RAID at all.

But you're right. In a few years it will become advantageous to switch to a couple of larger HDDs. I could probably do it right now, but I don't yet trust these new drives as much as I trust the old ones, especially since the refurbished scandal.

4. nine_k ◴[] No.45068931[source]
In a RAID6 with 8 drives, you can allow one disk to go offline and remain able to write, or two disks offline and remain able to still read 100% of data. You lose 2 of 8 = 25% capacity on redundancy.

With a mirror of 2 disks, if one disk dies, you can still read; if two disks die, you're toast. And you lose 1 of 2 = 50% of capacity on redundancy.

A quite different balance.