Date: Sun, 1 Apr 2007 10:00:37 -0700 From: "Matthew Jacob" <lydianconcepts@gmail.com> To: "Richard Tector" <richardtector@thekeelecentre.com> Cc: freebsd-stable@freebsd.org Subject: Re: Dell SAS5 Performance Issue Message-ID: <7579f7fb0704011000o781259d7u43b15cc999f60168@mail.gmail.com> In-Reply-To: <460FCE61.7090006@thekeelecentre.com> References: <460959E8.207@thekeelecentre.com> <7579f7fb0703271102q1a866897x2d63a86e72895125@mail.gmail.com> <46095CE5.5080600@thekeelecentre.com> <7579f7fb0703272018i68983d5cvb9fe84c79cebd473@mail.gmail.com> <460FCE61.7090006@thekeelecentre.com>
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On 4/1/07, Richard Tector <richardtector@thekeelecentre.com> wrote: > Matthew Jacob wrote: > > On 3/27/07, Richard Tector <richardtector@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@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?
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