New LSI 9200 series controllers: 6Gb/s, 2.88 GB/s seq. reads, 1.87 GB/s seq. writes

[Mastakilla]

Hi all,

I just tried creating my first RAID5 on my LSI controller.
I used all default settings atm (64KB Stripe Size, Write through since I dont have a BBU).

I just tried a few quick benchmarks.

Read speed seems normal: 40MB/sec min, 320MB/sec max and 196MB/sec avg in HD Tune
But write speed doesnt seem normal at all: 10MB/sec min, 22MB/sec max and 15MB/sec avg in HD Tune
CrystalDiskMark shows similar results...

Now I know that write speeds in RAID5 arent supposed to be shockingly fast, but I did expect around 100MB/sec for a 500 euro controller (I remember the ancient Areca controllers doing quite well in RAID5 write speeds)
I did a fast initialize and read about it that it writes the first 10MB and last 10MB of each disc with 0 and does the rest in the background.
However I don't see any ongoing operations in MSM...

So is this horrible write speed because of the secretly in the background running initialization? (if yes: where / how can I see if it is done?)
Or is this horrible write speed really the speed it should have? (because of the write through setting and RAID5)

I definitely hope something is still wrong somewhere

Thanks