Freenas Server PC Help
1)i was wondering would it be better to go for dual xeon instead of the i5 as i can use the i5 for another build and as xeon processors are designed for server use?
2)If i using an ZFS file system should i out more two drives in raid and if so could you recommend a decently priced raid card?3)I was watching linus`s home server video and he talked about something called link aggregation so i was wondering someone could shed some light on that matter?4) I don't have error-correcting memory (ECC), would it make a massive difference to use standard ddr3 ram that i already have.
- Between those two, the i5-3540, although I consider that somewhat overkill for just a FreeNAS machine (unless it's doing some other things on top of file storage). See my recommendation at the end of this post.
- It entirely depends which RAID you mean. If you mean RAID 10, then sure, buy 2 more HDDs. If you mean RAID 5 or 6 (Z1 and Z2 in FreeNAS respectively), then no. That is a bad idea. Don't get a RAID card. They are pointless if you are using ZFS. ZFS has software RAID that is as good, if not better, than any reasonably priced RAID card.
- Link Aggregation is basically taking multiple ethernet ports and making them work together. Other terms are "teaming", "bridging", although they can mean slightly different things. Link Aggregation basically would mean that 2 or more ethernet ports would look like a single connection and have the bandwidth of however many ethernet ports you have.
- Yes. You wouldn't be able to safely use some of ZFS' special features (what makes it special) like scrubbing. In fact, if something does go terribly wrong with that RAM you currently have, it could very well corrupt all of your data. Or at least it would corrupt your data until you realized something was wrong. It is a very bad idea to use ZFS with non-ECC for this reason. You can, but it's not safe and if you care about your data at all, you won't do it.
About your hardware considerations...
I don't recommend using the CPU and RAM you already own personally. Save that for some other build (pfSense, or a VM host or something maybe).
This motherboard is very powerful. I recommend it for a FreeNAS build because it is very good for what it is but only for people who will be doing a lot. Then grab 8GB of ECC RAM (1x8GB is fine imo rather than 2x4GB), and just rock on. You don't need a RAID card if you plan to use FreeNAS. If you do get 2 more HDDs, then go for 16GB of ECC RAM.
If you don't need that much power (and it is a lot), look at ShadowCaptain's post. FreeNAS with ZFS can be ran on a very weak CPU as long as you don't plan on doing a lot. Just remember: RAM capacity and being ECC are most important to ZFS performance and data integrity. More and ECC is always preferred, ECC basically being required.

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