ahci hangs on Supermicro MicroCloud second channel
Dmitry Morozovsky
marck at rinet.ru
Sun Mar 18 20:45:04 UTC 2012
On Sun, 18 Mar 2012, Steven Hartland wrote:
> > different on ada0 and ada1!):
> > ada0, MC 50-60 MBps ada1, MC 13-25 MBps
> > ada*, 5017 130+ MBps
> >
> > Could you please post SATA/AHCI BIOS settings from your machines? Thanks a
> > lot!
>
> Just AHCI configured as far as I remember.
Microcloud has AFAIR additional settings for delaying disk spin and
enablink/disabling hotswap, but mangling these options does not change anything
for me
> What you mean by MC vs 5017?
platform name: MicroCloud vs 5017C-MTF, both based on the same chipset
> How are you measuring disk speed?
the simplest: dd if=/dev/ada0 of=/dev/null bs=1m count=16k (linear read
16g at the beginning of disk)
> What value do you have for sysctl vfs.read_max?
default for both cases, 8
--
Sincerely,
D.Marck [DM5020, MCK-RIPE, DM3-RIPN]
[ FreeBSD committer: marck at FreeBSD.org ]
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*** Dmitry Morozovsky --- D.Marck --- Wild Woozle --- marck at rinet.ru ***
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