Date: Tue, 20 Mar 2012 11:37:33 +0100 From: Ivan Voras <ivoras@freebsd.org> To: freebsd-stable@freebsd.org Subject: Re: ahci hangs on Supermicro MicroCloud second channel Message-ID: <jk9mld$n6k$1@dough.gmane.org> In-Reply-To: <D3D5F844119143D8AB71B94265B674BE@multiplay.co.uk> References: <alpine.BSF.2.00.1203181934540.65171@woozle.rinet.ru><DF1AA664FAF24CE3BE38746A6F852BE4@multiplay.co.uk><alpine.BSF.2.00.1203182057380.65171@woozle.rinet.ru><4EB522A5E2744235B0680BAF97F81862@multiplay.co.uk> <alpine.BSF.2.00.1203190039230.74471@woozle.rinet.ru> <D3D5F844119143D8AB71B94265B674BE@multiplay.co.uk>
next in thread | previous in thread | raw e-mail | index | archive | help
[-- Attachment #1 --] On 18/03/2012 22:48, Steven Hartland wrote: > > ----- Original Message ----- From: "Dmitry Morozovsky" <marck@rinet.ru> >> the simplest: dd if=/dev/ada0 of=/dev/null bs=1m count=16k (linear >> read 16g at the beginning of disk) >>> What value do you have for sysctl vfs.read_max? >> >> default for both cases, 8 > > Try 32 that's what we have here set here. vfs.read_max will only affect file system reads, not raw device reads. [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.18 (FreeBSD) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAk9oXe0ACgkQldnAQVacBcj3xQCgguP5SgJoStbzFnCvSU+RG9F/ Z7kAnAycqTJDMO2awTRSAPVZh2KPznnA =krXy -----END PGP SIGNATURE-----
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?jk9mld$n6k$1>