Data Hoarder

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We are digital librarians. Among us are represented the various reasons to keep data -- legal requirements, competitive requirements, uncertainty of permanence of cloud services, distaste for transmitting your data externally (e.g. government or corporate espionage), cultural and familial archivists, internet collapse preppers, and people who do it themselves so they're sure it's done right. Everyone has their reasons for curating the data they have decided to keep (either forever or For A Damn Long Time (tm) ). Along the way we have sought out like-minded individuals to exchange strategies, war stories, and cautionary tales of failures.

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I'm trying to Hannah Montana this Situation (alien.top)

submitted 11 months ago by [email protected] to c/[email protected]

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Hey friends, looking for advice on how I can possibly get the best of both worlds out of this situation...

Some Background:

I've been running a Plex server for about 2 years now. 2018 Mac Mini, DAS: Pegasus R4 with 4x 12TB drives configured in RAID5. It's worked great, no complaints. I'm nearing the 36TB capacity of my array and have been researching the best course to upgrade for a couple months. Very interested in the idea of building a proper server and moving to Proxmox so I can start doing some other homelab stuff with the machine as well.

Yesterday, I got a new job which starts in February, so I have a little bit of time to figure things out.

For the new job, I will need to build a RAID with 70-100TB of usable space. I'll be offloading 1TB and 2TB NVMe's to 2 destinations. Destinations are the HDD RAID I'm building as well as to a 4TB NVMe external drive. Everything must be run through an xxhash64 checksum. One downside, is I'm required to use MacOs for the job. The offload has to be pretty fast, without breaking the bank.

The cheapest/easiest solution I've come up with is:

- Buy Mac Studio M1 Max ($1,579 refurbished from Apple)

- Buy OWC Thunderbay 8 enclosure ($899.99)

-Fill the Thunderbay with 20TB IronWolf Pro drives ($1800 for 6x 20TB)

Pros to this setup: Relatively cheap given the parameters. No building anything or relying on my (lack-of) skill in building a DAS/NAS. Good warranties on the computer and enclosure if something goes wrong and needs replaced fast.

Downsides to this setup: I really don't like the idea of using Softraid. I would much prefer a hardware raid. The Thunderbay is big and power hungry, and I'd prefer something rack mounted.

I considered the idea of building a NAS...But then to move files from the source drives to the NAS, would I just need a 10Gb switch to establish a local network on my work truck? (I've never done this, only used DAS for work) I also have no idea what kind of read/write speeds I could expect from a NAS spinning the IronWolf Pros.

What I'm looking for is advice on possibly building a DAS or NAS that I could use for the job and, when the job is over, reuse as much of it as possible in my new Plex server / Homelab build. Ideally, it would be compatible with both MacOS and Linux, have hardware RAID control, minimum 8 bays, be rack mounted and power efficient.

Based on the price of the above setup, I'll say my budget is $2,500 excluding the cost of HDDs.

Things I already own that may or may not be helpful: 2018 Mac Mini i7 w/ 16GB DDR4 RAM, Pegasus R4 with 4x 14TB IronWolf Pro Drives

Thanks for your time and I appreciate any feedback you can give!

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[–] [email protected] 1 points 11 months ago (1 children)

Those 6 7200RPM drives will be able to saturate your 1Gbps link and will even give your 10 gig link a pretty decent workout. Remember, when working with RAID, you’re dealing with multiple IO, so you can take throughput of one of those drives and multiply it by six, and that’s effectively what you’re going have available. I would personally recommend using a good set of SAS drives, over SATA, to maximize your bandwidth server side.

[–] [email protected] 1 points 11 months ago

Thanks for commenting! I'm not sure if I can afford to go with 6x 20TB SAS drives over the 6x 20TB SATA drives, but will have to consider that...

Remember, when working with RAID, you’re dealing with multiple IO, so you can take throughput of one of those drives and multiply it by six, and that’s effectively what you’re going have available.

Can you explain this for me or point me to a resource to learn what you mean? My knowledge of RAID is limited to how many drive failures it can handle and the boosts in read/write speeds. I will be using RAID 5, possibly RAID 6 for my situation, so no write speed gains either way.

Let me know if I'm missing something here. My single mac computer will be the only client able to access the server.

Where I need the most speed is writing from the NVMe source to the RAID. The only time I'd be reading the data on the RAID is when it's generating the checksum after the data transfer is complete, right?

I don't need to access any of the files kept on the RAID while I'm offloading the footage. So the write speed from the source to the RAID should be 260-285Mbps, I think?