Date: Sat, 19 Feb 2011 02:03:22 +0300 (MSK) From: Dmitry Morozovsky <marck@rinet.ru> To: Jeremy Chadwick <freebsd@jdc.parodius.com> Cc: freebsd-scsi@freebsd.org, stable@freebsd.org, "Kenneth D. Merry" <ken@freebsd.org> Subject: Re: mps(4) driver (LSI 6Gb SAS) commited to stable/8 Message-ID: <alpine.BSF.2.00.1102190200240.14809@woozle.rinet.ru> In-Reply-To: <20110218223832.GA68261@icarus.home.lan> References: <20110218164209.GA77903@nargothrond.kdm.org> <alpine.BSF.2.00.1102190104280.14809@woozle.rinet.ru> <20110218223832.GA68261@icarus.home.lan>
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On Fri, 18 Feb 2011, Jeremy Chadwick wrote: JC> > KDM> I just merged the mps(4) driver to stable/8, for those of you with LSI 6Gb JC> > KDM> SAS hardware. JC> > JC> > [snip] JC> > JC> > Again, thank you very much Ken. I'm planning to stress test this on 846 case JC> > filled with 12 (yet) WD RE4 disks organized as raidz2, and will post the JC> > results. JC> > JC> > Any hints to particularly I/O stressing patterns? Out of my mind, I'm planning JC> > multiple parallel -j'ed builds, parallel tars, *SQL benchmarks -- what else JC> > could you suppose? JC> JC> Please be aware of a performance issue affecting certain models of WD JC> RE4 disks. Specifics are still sketchy, but you should read the thread JC> "immense delayed write to file system (ZFS and UFS2), performance JC> issues" in full to get an idea of the problem: Well, my disks are (possibly happily ;) not RE4-GP but real RE4 (yellow labels, Raid Edition Ready) But thanks, I'll take additional time to log smartctl data during the tests... -- Sincerely, D.Marck [DM5020, MCK-RIPE, DM3-RIPN] [ FreeBSD committer: marck@FreeBSD.org ] ------------------------------------------------------------------------ *** Dmitry Morozovsky --- D.Marck --- Wild Woozle --- marck@rinet.ru *** ------------------------------------------------------------------------
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