About 836 vs 846:
I have a 836 and a 846 and if I get another chassis it will be a 846 again because it's "stoage density" is better (24 devices/4u vs 16 devices/3u). Another point for the 846: there are more (sas2 AND sas3) expanders available on ebay than for the 836.
Edit: "A" (sas multilane...
Firmware v3.21 + driver v184.108.40.2062 + maxview v3.06.23821 can't handle any storage configuration in windows or pcie changes (adding/removing or moving pcie devices to another slot); the logical drives will disappear and only show up after saving the configuration in the bios. I can...
Not sure if you consider a single socket comparable: I am running windows 10 pro for workstations on a x10sra with a xeon 1630v4, 64GByte ram and a 1080ti (got it for free :P) and play occasionally fps (doom/doom eternal, csgo and the wolfenstein games).
So far no differences to a consumer system :D
2.58M x 512 Bytes = ~1.23 GByte/s, that's really impressive for a non nvdimm blockdevice.
I'm curios what numbers are possible with random writes. (I was kinda disappointed of first gen optane nvdimms https://arxiv.org/pdf/1903.05714.pdf & First Optane Performance tests show benefits and limits...
It depends how the backplanes are wired :D
There are two backplanes, one has 3 multilane sas ports, the other has 2 multilane sas ports.
In the 36 bay version I would connect the second backplane with a single cable to the third multilane sas port on the first backplane and then route the two...
It's often described/explained as "dual link" : two multilane sas ports on the hba/raid controller connect to two multilane sas ports on the backplane increasing the total bandwidth between expander and hba/raid controller.
That's only true for empty hdds when data is written to the outer sectors. That's why all the datasheets say "up to" or "max" xxx MByte/s.
The more data is stored, the slower the drive becomes.
Example seagate exos 16TByte: empty ~245MByte/s, ~80% full ~100MByte/s, ~95% full <70MByte/s
The CS-1 outperformed #82 of the top500 supercomputer by a factor of 200:eek:
Riesenprozessor schlägt Supercomputer (article is in german!)
"It depends", 4KByte sectors are more efficient, see Advanced Format - Wikipedia
I would not try to format hdds that use 512Bytes NATIVELY, the firmware probably won't recognize the drive after the format.
I don't know if broadcom raid controller support ssds with sector sizes over 512 Bytes...