Question about Raid Performance
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@jmoore said in Question about Raid Performance:
I got an extra perc h310 card and wondered if I would get better performance using that instead of mdadm.
Not even close. MD RAID will destroy any RAID card. Especially a super low end one with low cache and known implementation problems drastically impacting performance.
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@DustinB3403 said in Question about Raid Performance:
Assuming RAID1 because you don't seem like the YOLO type, I can't imagine your performance would jump by using hardware.
RAID 1 or 10 performance can be cut by more than half, in fact!
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@jmoore said in Question about Raid Performance:
@wrx7m Its my workstation. I won't be pushing the machine most likely. Just consider it a theoretical question. If the machine was going to be pushed to its limits, would using this card make sense?
No, this card is for low performance systems that need hand holding for the bench techs swapping failed drives.
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@DustinB3403 said in Question about Raid Performance:
@jmoore said in Question about Raid Performance:
@wrx7m Its my workstation. I won't be pushing the machine most likely. Just consider it a theoretical question. If the machine was going to be pushed to its limits, would using this card make sense?
No, because the CPU on this Chip is older than the CPU you have in the unit. Your performance would likely suffer.
And a tiny fraction of the cache.
And only uses one drive for reads, not both!
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@jmoore said in Question about Raid Performance:
@DustinB3403 lol umm yeah, I have never used hardware raid before so just wanted to see if I was missing anything.
You are missing blind swap, that's it.
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@scottalanmiller Ok good to know. Never bought a raid card and now likely never will. Just had to ask lol
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@scottalanmiller Dang I had no idea.
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@jmoore said in Question about Raid Performance:
@scottalanmiller Ok good to know. Never bought a raid card and now likely never will. Just had to ask lol
They have a place, but generally only in shops where there is a need for blind swap (often when non-IT staff has to do physical hardware work like in a datacenter), where you run something that doesn't support enterprise software RAID (Windows, Hyper-V, and ESXi all lack software RAID that is usable), and when the equipment is very high end with huge processors and big cache (if your RAID card isn't $800, just walk away.)
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@scottalanmiller Ok thanks I understand a little better now. I certainly have no complaints with my current setup but I'm always looking to expand my knowledge.
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@jmoore said in Question about Raid Performance:
@scottalanmiller Ok thanks I understand a little better now. I certainly have no complaints with my current setup but I'm always looking to expand my knowledge.