Date: Fri, 23 Jun 2006 09:02:12 -0600 From: "Justin T. Gibbs" <gibbs@scsiguy.com> To: Volodymyr Kostyrko <arcade@synergetica.dn.ua>, freebsd-scsi@freebsd.org Subject: Re: ahd(4) poor performance Message-ID: <90D11403BD2140875BFEB24D@[10.0.0.22]> In-Reply-To: <4499B748.6040805@synergetica.dn.ua> References: <4499B748.6040805@synergetica.dn.ua>
next in thread | previous in thread | raw e-mail | index | archive | help
--On Thursday, June 22, 2006 12:16 AM +0300 Volodymyr Kostyrko <arcade@synergetica.dn.ua> wrote: > Hi all. > > I have: > > ahd0: <Adaptec (Dell OEM) 39320 Ultra320 SCSI adapter> port > 0xdc00-0xdcff,0xd800-0xd8ff mem 0xdfbfe000-0xdfbfffff irq 66 at device > 7.0 on pci3 > ahd0: [GIANT-LOCKED] > aic7902: Ultra320 Wide Channel A, SCSI Id=7, PCI-X 101-133Mhz, 512 SCBs > ahd1: <Adaptec (Dell OEM) 39320 Ultra320 SCSI adapter> port > 0xd400-0xd4ff,0xd000-0xd0ff mem 0xdfbfc000-0xdfbfdfff irq 67 at device > 7.1 on pci3 > ahd1: [GIANT-LOCKED] > aic7902: Ultra320 Wide Channel B, SCSI Id=7, PCI-X 101-133Mhz, 512 SCBs > > Booting machine also results in: > > ahd0: Invalid Sequencer interrupt occurred. This error is benign. There have been issues reported with some recent Seagate drives and large queue depths. You may get better performance if you use camcontrol to lower the queue depth to 63 or 32. I believe that 32 is the default used by Linux. -- Justin
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?90D11403BD2140875BFEB24D>