While expensive these drives would be so much denser than magnetic drives that they would save a LOT of data center room and probably prevent many new data centers from having to be built so might be cheaper in long term total cost of ownership.
6 2.4TB data-center grade SAS HDDs would cost $3,600, making flash roughly 3.5x more expensive. OTOH, HDDs would occupy a lot more space, generate a lot more heat, and draw a lot more power. A 2U rack server has space for about 30 2.5 units. That'd be about 120 TB in HDDs, but could reach 3+ PB of flash storage.
therealpygon · 1d ago
Sorry… I’m not sure that math is mathing for me. How do you get that 122 TB of flash is 3.5x more expensive that 12TB of SAS? Aren’t you a full order of magnitude in the wrong direction or did I miss something? Or I guess to say, 12TB would be $1,200 for flash, comparably, making it 3x cheaper, no?
rbanffy · 1d ago
Sorry. I half-edited. It was originally 20TB, but 20TB drives only come in 3.5 inch form factor, so I was going with 2.4TB drives (which is the biggest 2.5 I could find directly from configuring servers). You can't fit 122TB of them in a 2U server.
UltraSane · 1d ago
This article [1] talks about a 2U server containing 40 1PB drives which would be 40PB/server * 20 servers/rack = 800PB per rack.
102 32TB hard drives in a 4U 102 bay JBOD would is the densest magnetic storage can get. If we can put 8 of these in a rack leaving 10U for switches and servers that would be only 26PB per rack. So these 1PB SSDs would be up to 30 times denser.
$12,000 * 1000/122 is about $98,000.
While expensive these drives would be so much denser than magnetic drives that they would save a LOT of data center room and probably prevent many new data centers from having to be built so might be cheaper in long term total cost of ownership.
https://www.shopblt.com/item/solidigm-d5-p5336-122.88tb-9.5m...
6 2.4TB data-center grade SAS HDDs would cost $3,600, making flash roughly 3.5x more expensive. OTOH, HDDs would occupy a lot more space, generate a lot more heat, and draw a lot more power. A 2U rack server has space for about 30 2.5 units. That'd be about 120 TB in HDDs, but could reach 3+ PB of flash storage.
102 32TB hard drives in a 4U 102 bay JBOD would is the densest magnetic storage can get. If we can put 8 of these in a rack leaving 10U for switches and servers that would be only 26PB per rack. So these 1PB SSDs would be up to 30 times denser.
[1] https://www.storagereview.com/news/e2-ssd-form-factor
No info about reliability, a feature at which flash storage does not exceeds.