I’m sketching the idea of building a NAS in my home, using a USB RAID enclosure (which may eventually turn into a proper NAS enclosure).
I haven’t got the enclosure yet but that’s not that big of a deal, right now I’m thinking whether to buy HDDs for the storage (currently have none) to setup RAID, but I cannot find good deals on HDDs.
I found on reddit that people were buying high capacity drives for as low as $15/TB, e.g. paying $100 for 10/12TB drives, but nowadays it’s just impossible to find drives at a bargain price, thanks to AI datacenters, I guess.
In Europe I’ve heard of datablocks.dev where you can buy white-label or recertified Seagate disks, sometimes you can find refurbished drives in eBay, but I can’t find these bargain deals everyone seemed to have up until last year?
For example, is 134 EUR for a 6TB refurbished Toshiba HDD a good price, considering the price hikes? What price per TB should I be looking for to consider the drives cheap? Where else can I search for these cheap drives?
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Prices of HDDs have increased in recent months due to the AI bubble
Here in the NL we have a website called Tweakers for comparing hardware prices. They only really list webstores that sell to the Netherlands, but it could help give you a decent indication of normal prices at the moment.
If I sort by price / TB, this refurbished 6TB Seagate SAS-drive for €122 seems to be one of the best deals I can find:
https://www.redshell.nl/seagate-enterprise-capacity-35-hdd-interne-harde-schijf-6-tb-7200-rpm-128-mb-35-sas/Given that price, €134 for a refurbished 6TB Toshiba seems like a pretty decent deal. Though I would like to add that my experience with Toshibas is that they are quite loud compared to Seagate and Western Digital. So if noise is a concern it might be worth looking for those instead.
I’d actually caution against buying suspiciously cheap drives. There has been an epidemic of scammers selling (heavily) used drives as new.
I was looking at this self-hosting guide and scratching my head in confusion. They say $80 nets you a 4TB HDD. Meanwhile, in my country that costs more like $220+. Yes, for an HDD, not SSD (that would be more like way over $500). I see the guide has been updated this year, so either the US lives in another world or nobody has updated the pricing.
I have been toying with the idea of using USB storage, but my concern is that the controllers are not meant to be used that heavily. Supposedly SATA controllers are also not built for the abuse I have been throwing them in my machines, and I don’t want to push it.
Supposedly SATA controllers are also not built for the abuse I have been throwing them in my machines, and I don’t want to push it.
what makes you say that?
If you’re getting used drives I’d recommend running the array in raid z2 or raid 6 for more parity drives
Just keep in mind that the rebuild time for RAID 6 grows with drive size. A 6TB drive takes 1.4 days to rebuild, an 8TB drive takes 1.8 days, and a 10TB drive takes 2.3 days. So when a drive fails you might have a lot of downtime.
Here’s the calculator I used in case anyone asks or has a more accurate option to recommend: https://cal67.calculator.city/raid-rebuild-time-calculator.html
Also, apparently this is a best case scenario. If you’re still having the server run you could see rebuild times up to 10x this.
That being said, it you stagger your drive life (aka add or prematurely replace 1 drive per year) you can further minimize risk of 2-3 drives going down all at the same time, so a yearly rebuild in the background shouldn’t be too bad
Raid 6 takes longer to rebuild but not twice as long, more like 45-50% longer. And raid 5 can’t tolerate another drive failure during the rebuild. With new drives I do use raid 5 (z1), but with used drives I’d want that extra assurance.
but nowadays it’s just impossible to find drives at a bargain price, thanks to AI datacenters, I guess.
You answered your own question.
that’s dumb. there are still better and worse prices
Nope. All worse.
that mathematically does not stand.
if a drive costs 1000 and another 2000, it cannot be that all is worse than each other!
Acronyms, initialisms, abbreviations, contractions, and other phrases which expand to something larger, that I’ve seen in this thread:
Fewer Letters More Letters NAS Network-Attached Storage RAID Redundant Array of Independent Disks for mass storage SATA Serial AT Attachment interface for mass storage ZFS Solaris/Linux filesystem focusing on data integrity
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