mfi driver performance too bad on LSI MegaRAID SAS 9260-8i

Harry Schmalzbauer freebsd at
Sun Jul 31 16:51:54 UTC 2016

 Bezüglich Jason Zhang's Nachricht vom 17.06.2016 09:16 (localtime):
> Hi,
> I am working on storage service based on FreeBSD.  I look forward to a good result because many professional storage company use FreeBSD as its OS.  But I am disappointed with the Bad performance.  I tested the the performance of LSI MegaRAID 9260-8i and had the following bad result:
>    1.  Test environment:
>         (1) OS:   FreeBSD 10.0 release
>         (2) Memory:  16G
>         (3) RAID adapter:   LSI MegaRAID 9260-8i
>         (4) Disks:  9 SAS hard drives (10000 rpm),  performance is expected for each hard drive        

Were the drives completely initialized?
I remember that at least one vendor had implemented read-past-write for
every sector when written first.
It was with 15k 3.5" spindles and I'm really not sure which vendor it
was, so I won't name any. But "slow init" had solved a similir problem
for me back then...


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