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>
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This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enig093485B6452826891A3962FF Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable On 18/03/2012 22:48, Steven Hartland wrote: >=20 > ----- Original Message ----- From: "Dmitry Morozovsky" <marck@rinet.ru>= >> the simplest: dd if=3D/dev/ada0 of=3D/dev/null bs=3D1m count=3D16k (li= near >> read 16g at the beginning of disk) >>> What value do you have for sysctl vfs.read_max? >> >> default for both cases, 8 >=20 > Try 32 that's what we have here set here. vfs.read_max will only affect file system reads, not raw device reads. --------------enig093485B6452826891A3962FF Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----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----- --------------enig093485B6452826891A3962FF--
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