Dell SAS5 Performance Issue

[Matthew Jacob]

On 4/1/07, Richard Tector <richardtector at thekeelecentre.com> wrote:
> Matthew Jacob wrote:
> > On 3/27/07, Richard Tector <richardtector at thekeelecentre.com> wrote:
> >> Matthew Jacob wrote:
> >> > It's been seen before but the fix isn't know yet.
> >> >
> >> > On 3/27/07, Richard Tector <richardtector at thekeelecentre.com> wrote:
> >> >> I'm suffering from very slow write performance on a Dell PowerEdge
> >> 860
> >> >> with the SAS5/IR controller (mpt driver) running either
> >> 6.2-RELEASE or
> >> >> 6.2-STABLE with sources from yesterday. The controller hosts 2
> >> Western
> >> >> Digital 320GB SATA disks in a RAID1 configuration.
> >> >> Reads approach 65MB/s however writes appear extremely slow, in the
> >> >> region of 6-7MB/s with a dd and a blocksize of 1MB all the way
> >> down to
> >> >> about 300KB/s while extracting a ports snapshot.
> >> >>
> >> >> It was suggested to me that perhaps write caching has been
> >> disabled on
> >> >> the controller however no options exist within the BIOS
> >> configuration to
> >> >> view/adjust *any* caching options.
> >> >>
> >> >> Has anyone else experienced this issue? If so how did they resolve
> >> it?
> >> >> Also, is there any way to toggle the caching settings from FreeBSD?
> >>
> A perhaps unrealted issue:
> I've noticed a large number of messages being produced by the mpt driver
> after boot occuring approximately every 90 seconds.
>
> Apr  1 15:51:43 moses kernel: mpt0: mpt_cam_event: 0x14
> Apr  1 15:51:43 moses kernel: mpt0: Unhandled Event Notify Frame. Event
> 0x14 (ACK not required).
> Apr  1 15:53:19 moses kernel: mpt0: mpt_cam_event: 0x14
> Apr  1 15:53:19 moses kernel: mpt0: Unhandled Event Notify Frame. Event
> 0x14 (ACK not required).
>
> Any thoughts anyone? Is there any way to find out what the events
> correspond to?
>

MPI spec, instantiated in MPILIB

MPI_EVENT_IR_RESYNC_UPDATE

internal raid resync update?