Why VMware Virtual disk so slow (da0: 3.300MB/s transfers) ?

[Dongsheng Song]

On Fri, Aug 23, 2013 at 3:09 PM, Sascha Wildner <saw at online.de> wrote:
> On Thu, 22 Aug 2013 18:08:56 +0200, Dongsheng Song
> <dongsheng.song at gmail.com> wrote:
>
>> So merge mpt (LSI Logic) driver from FreeBSD is valuable, but
>> unfortunately, I no suck skill.
>
>
> Also, can you paste a _verbose_ dmesg? For verbose boot, select 'v' at the
> loader menu.
>
> Sascha

This is interesting in FreeBSD dmesg:

da0: 320.000MB/s transfers (160.000MHz, offset 127, 16bit)
da0: Command Queueing enabled

Maybe command queue caused performance regress ?

please find the attachment for a _verbose_ dmesg.
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