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SAS-Lanes and SAS-Expander quesitons
(alien.top)
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this post was submitted on 04 Dec 2023
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Thank you, that clears up alot.
So basically I have 3 front cages, each connected with 2 ports, as you said (DL380 Gen10). The expander has 9 ports, so 1 is free to use.
I'd like to connect a tape drive to it. It is using Mini-SAS, while the expander is Slimline-SAS. I found a converter, which uses a PCIe-Bracket (without the port, just passively converts), so from what I understood I should be able to convert Mini-SAS->Slimline-SAS and then just connect it with a slimine->slimline SAS cable to the expander?
How does the speed work - if it is like a switch the bandwidth would only suffer if the Tape is actively using the link? Or will it always decrease because the port is connected?
You can put a tape drive on the last port like you describe.
Nothing on the expander will suffer unless the full 96gbit link to raid card is saturated and it has to start throtteling stuff.
if you have something 4-8x cache SSDs with high load they would normally go in one cage and that cage gets its own controller.
To not risk saturating the link from expander and impacting performance + avoid the tiny latency expander adds.
Thank you again. I only have 10k 2,5" HDDs, so I guess I won't be close to saturating it. That really helps!