@warri, Please do not advise people to under-estimate their spin watts. Most drives take nearly 2 amps on the 12 volt to spin up, putting the current required for spin at around 20-25 watts per drive, NOT including the power for the board electronics (a few watts). Even the lowest power 3.5" drives take at least 1.2A, which is still 14 watts, just for spin, plus the idle watts for the electronics.
Underestimating your spin current on a PC is harmless since you're only talking one or two drives and you should have sufficient headroom. However, on a NAS, this is an important variable, because eight drives means that you need to account for an extra 150-200W of capacity just for spin. If you use an under-rated supply, either you will stress the components in the supply (leading to premature supply failure) or you will experience voltage sag (leading to premature drive failure). Neither of these are good things.
A newbie here. What is your current build? I would like to use that board too. Only negative thing that I read (and comprehended) was that the CPU is soldered to the board.Hi all,
I'm getting ready for my next build. I think I am pretty set on the following:
- ASRock C2750D4I Motherboard
Hi
Based on what I hear (from my system), the drives are not spinning up at the same on my box. This would mean that the peak draw on my system is spread over a couple of seconds and this is really nice. This also seems rather logical.
As long as you do not cause your drives to sleep, and you've got them set for staggered spin-up in the BIOS, you may be okay. The moment they sleep while FreeNAS is running, however, you run the very real risk that a task might cause reads to happen from several drives simultaneously, waking them all at once, which is then seriously hazardous to your system.
Generally speaking there is little benefit to be gained, since a larger supply - capable of spinning eight or ten drives, even, in tandem - is only marginally more expensive. It is also safe.
But it is your equipment. If you fry your drives, be aware that it may be difficult to go RMA'ing several drives that have all failed due to voltage sag.
I would actually recommend the SuperMicro C2750 over the ASRock.Hi all,
I'm getting ready for my next build. I think I am pretty set on the following:
- ASRock C2750D4I Motherboard
- Silverstone DS380 Case
- Kingston KVR16N11K2/16 2x8gb kit (will add another 16gb in the future as needed)
- 4 x WD RED 4Tb hard drives in RAIDZ1 (I think... still considering if I need RAIDZ2)
In the future, when I'll need to, I will add another pool of RAIDZ1 with another set of 4 x WD Red 4Tb drives and another set of 2x8Gb RAM.
A few questions:
Thanks!
- Which power supply should I get? I ofcourse want to the most efficient low-power supply, yet one that could run everything in the future, in the 8-drives configuration.
- Any point in RAIDZ2? I have a current system that I'll use as an off-site backup for the critical files using RSYNC. The current system is more modest: 4x2Tb drives (1 Red, 3 Green), Intel Atom 525 with 4Gb Non-ECC ram (but the processor can only see 3gb). I use NAS4FREE on the current machine because FREENAS was insanely slow while NAS4FREE was able to serve the files without issue despite the limitations.
- Any changes you'll make to the setup?
- How would you recommend I'll setup the OS itself? Does freenas run fine from a USB stick like NAS4FREE, or is that not the recommended approach?
- The DS380 has 4 additional internal bays in 2.5" form. Can I use one of those as a cache disk for ZFS using an SSD? If so, any recommendations on an SSD to use and what size?
- Last, I guess I know the answer but I'll ask again: Is deduplication still a bad idea for home systems like the one I described? I did manage to crash my zpool when I enabled deduplication a few years ago on the old machine, but as you can see I had really low RAM and hardware :).
I would actually recommend the SuperMicro C2750 over the ASRock.
You probably wouldn't benefit much from an SSD for L2ARC
@jgreco, @cyberjock - thanks for the input. Sounds like you'd recommend the 450W model to be on the safe side? Silverstone Tek 450WI have to ask because I understand NOTHING when it comes to power and electricity, does 450W power supply means that it will take more power from the wall all the time 24/7, leading to higher electric bills each year? Or is this really negligible? The price difference between the two is really a non-issue.
By the way, I have to give kudos to iXsystems, the more I research the gear I have to buy, the more the Freenas Mini makes more sense to me. The price difference is really not that big, especially for the diskless system, and you get something that you know will work great. My only gripe is that you're limited to 4 drives, and that's not good in the long run.