This number is very interesting. Basically Diskotech stores 1PB in 18" × 6" × 42" = 4,536 cubic inch volume, which is 10% bigger than standard 7U (17" × 12.2" × 19.8" = 4,107 cubic inch).
124 days ago Dropbox Storage Engineer jamwt posted here (https://news.ycombinator.com/item?id=10541052) stating that Dropbox is "packing up to an order of magnitude more storage into 4U" compared to Backblaze Storage Pod 5.0, which is 180TB in 4U (assuming it's the deeper 4U at 19" × 7" × 26.4" = 3,511 cubic inch). Many doubted what jamwt claimed is physically possible, but doing the math reveals that Dropbox is basically packing 793TB in 4U if we naively scale linearly (of coz it's not that simple in practice). Not exactly an order of magnitude more but still.
Put it another way, Diskotech is about 30% bigger in volume than Storage Pod 5.0 but with 470% more storage capacity.
That was indeed some amazing engineering.
Also not everyone wants to be packing a petabyte into a box. At that level of density you need to invest a lot of effort in replication strategies, tooling, network fabric etc to handle failures with high levels of availability/durability.
What is your price per GB raw?
We have flash caches (NVMe) in the machines, but the long-term storage devices are spindle--PMR and SMR.
> What is your price per GB raw?
I cannot disclose, exactly, but it is well below any other public price I've seen.
Obviously if you are playing seriously with VMs and databases and whatever else both of those (SLOG/L2ARC) may become important for you, I'm going for the "i'm just using this to store my raw-format photos, backups for the taxes and other big files" kind of usage here. :)
That is, the better your software can handle repair, the smaller your failure domain can be?
A larger failure domain would only make sense if you wanted to minimize the compute required per unit stored?
Then again, I don't really like putting too much weight that high up in a rack that already has 2600lbs of gear in it.
2.5" 15TB ... and SSD, and expected to get a lot bigger too!
The dimensions given are just an approximation.