Date: Wed, 18 Oct 2006 08:35:53 -0700 From: "Matthew Jacob" <lydianconcepts@gmail.com> To: "Johannes.Kruger@nokia.com" <Johannes.Kruger@nokia.com> Cc: freebsd-scsi@freebsd.org, freebsd-hackers@freebsd.org Subject: Re: LSI1064 and LSI1064E and mpt Message-ID: <7579f7fb0610180835wf89cbc8lef04d1a4f1a73cb1@mail.gmail.com> In-Reply-To: <E9C6E9346955B54D9C707AA03EA5193A017875D9@daebe102.NOE.Nokia.com> References: <7579f7fb0610121617n2b6b4cdap67eeb0c9b5a58da8@mail.gmail.com> <E9C6E9346955B54D9C707AA03EA5193A017875D9@daebe102.NOE.Nokia.com>
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On 10/17/06, Johannes.Kruger@nokia.com <Johannes.Kruger@nokia.com> wrote: > Hi Matthew. > I gave up on the PCI-express version of the card for the time being. My contact at LSI hasn't gotten back to me. > The PCI-X running the same firmware works fine, except for the slow RAID > of course. > > I still have the main problem I try to get to the bottom off, and that > is that the RAID-1 volume da0 is very slow. > - Slow with even just 1 disk. > - Slow when sync completed or not. > Without RAID configured , and having 2 disks mounted, the disks are fast > ~ 30 Mbytes/sec > The disks are Fujitsu SATA laptop drives. Integrated Mirroring has always been a problem. For parallel SCSI, you have to negotiate with the physical drives themselves. This *shouldn't* be an issue with SAS, but you never know. > > I was poking around the MPI libraries of Linux, and I see they have some > extra entries related to SAS. > Also the file mptsas.c in Linux sets up the link speed and so on on the > PHY. > Do not know if something there is needed yet. > > Any idea of where I can start looking for the problem ? > - link speed > - dma > - caching > - etc ..etc .. > Don't know yet. The RAID stuff for mpt was written solely for SPI. It's a miracle it works at all for SAS or FC. I have a sunfire4100 on loan which supports this and when I have a spare moment (hah) I'll look into it.
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