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If you were to suddenly come into possession of 12+ enterprise-grade SAS hard drives, how would you go about incorporating them into your homelab? (midwest.social)

submitted 10 months ago by [email protected] to c/[email protected]

46 comments fedilink hide all child comments

Pretend your only other hardware is a repurposed HP Prodesk and your budget is bottom-barrel

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[–] [email protected] 7 points 10 months ago* (last edited 10 months ago) (2 children)

This is a great observation, and it made me do some math:

If my point of comparison is something like a seagate ironwolf 4T vs a WD Ultrastar 4T:

Seagate Ironwolf: 
- 3.7W*24 Hours/day*365 days/year = 32kWh per year * $0.18/kWh = $5.84 per year in power usage * 12 disks in an array = $70.02 per year

*Edit: Looking at this closer, a more reasonable comparison would be an ironwolf PRO disk, since this is a NAS use-case (24-7 run time, large and repeated writes and reads, ect). The power consumption for that is 5.5W, which is a lot closer to the Ultrastar*

WD Ultrastar:
- 7W*24 Hours/day*365 days/year = 61kWh per year * $0.18/kWh = $11.05 per year in power usage * 12 disks in an array = $132.6 per year

Seems like i'd save maybe $70 per year. I feel like that difference might even be justifiable if the enterprise drives are half as likely to fail (seagate ironwolf has an AFR of 0.87%, WD Ultrastar is 0.44%).

Something to think about, at least

[–] [email protected] 14 points 10 months ago (3 children)

635 days is a fucking long year.

[–] [email protected] 5 points 10 months ago

Sometimes a day just FEELS like it's 48 hours long.

[–] [email protected] 5 points 10 months ago

Lol, thanks

[–] [email protected] 4 points 10 months ago

2020 mood math.

[–] [email protected] 1 points 10 months ago (1 children)

In defence, the power prizing here is a tad different, €0.45/KWh was the prize here. Also, when those disks are given away, they are usually smaller then the current standard and less efficient. On the other hand, those enterprise grade disks generate some heat, saving on the heating bill.

[–] [email protected] 1 points 10 months ago

that's all true. I'm anxious to get them open and see what they test at; it really seems like some of them are unused, but that could just be because they were refurbished and re-packaged. I'm really curious what the spin times are.