Date: Thu, 29 Jan 2009 11:43:46 +0000 From: Richard Tector <richardtector@thekeelecentre.com> To: Charles Sprickman <spork@bway.net> Cc: freebsd-stable@freebsd.org Subject: Re: 7.1, mpt and slow writes Message-ID: <49819672.1090208@thekeelecentre.com> In-Reply-To: <alpine.OSX.2.00.0901290351250.37588@toasty.nat.fasttrackmonkey.com>
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[-- Attachment #1 --] Charles Sprickman wrote: > Hello, > > I think this needs a few more eyes: > > http://lists.freebsd.org/pipermail/freebsd-scsi/2009-January/003782.html > > In short, writes are slow, likely do to the write-cache being enabled on > the controller. The sysctl used in 6.x to turn the cache off don't seem > to be in 7.x. I have two Dell 860's here also running 7.1-REL. A simple dd on one shows roughly 60MB/s writes to a mirror of 2 320GB disks on what I'm assuming is the same LSI controller card (SAS5) richard@moses:~# cat /boot/loader.conf hw.mpt.enable_sata_wc=1 Seems to work just fine for me. Regards, Richard [-- Attachment #2 --] 0 *H 01 0 + 0 *H <000 *H 01 0 UUK10U Staffordshire10 UKeele10U The Keele Centre1/0-U&The Keele Centre Certificate Authority0 060929142538Z 100929142538Z01 0 UUK10U Staffordshire10U The Keele Centre10URichard Tector1/0- *H richardtector@thekeelecentre.com00 *H 0 ;tbTjRsם N)B?fS?PYr ̏gxK?w;]؆!Lo -{,CzL`X0oA ,! 00 U 0 0, `HB OpenSSL Generated Certificate0 U y56N|Ad¯. H0U #0 4@-MxoW01 0 UUK10U Staffordshire10 UKeele10U The Keele Centre1/0-U&The Keele Centre Certificate Authority Xl~ u0 *H >a<<,a,u#8gfryQ31Zr_?&t Iooݔ_@ѝƶl!=7,C YE2&e5ss8 &K000 *H 01 0 UUK10U Staffordshire10 UKeele10U The Keele Centre1/0-U&The Keele Centre Certificate Authority0 060929142538Z 100929142538Z01 0 UUK10U Staffordshire10U The Keele Centre10URichard Tector1/0- *H richardtector@thekeelecentre.com00 *H 0 ;tbTjRsם N)B?fS?PYr ̏gxK?w;]؆!Lo -{,CzL`X0oA ,! 00 U 0 0, `HB OpenSSL Generated Certificate0 U y56N|Ad¯. H0U #0 4@-MxoW01 0 UUK10U Staffordshire10 UKeele10U The Keele Centre1/0-U&The Keele Centre Certificate Authority Xl~ u0 *H >a<<,a,u#8gfryQ31Zr_?&t Iooݔ_@ѝƶl!=7,C YE2&e5ss8 &K10001 0 UUK10U Staffordshire10 UKeele10U The Keele Centre1/0-U&The Keele Centre Certificate Authority0 + 0 *H 1 *H 0 *H 1 090129114346Z0# *H 19u>˹tȊ z}P60R *H 1E0C0 *H 0*H 0 *H @0+0 *H (0 +71001 0 UUK10U Staffordshire10 UKeele10U The Keele Centre1/0-U&The Keele Centre Certificate Authority0 *H 101 0 UUK10U Staffordshire10 UKeele10U The Keele Centre1/0-U&The Keele Centre Certificate Authority0 *H 6 .O1Z'A ()"6{:潬ě9K6RlM_<76Mɲ5?ODxZ$!K,:Ʉiע$_8I K {wдOqzChome | help
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