Date: Thu, 28 Aug 2008 18:19:05 +0400 From: Stanislav Sedov <stas@FreeBSD.org> To: "Marauder" <marauder@pi.avalonnetworks.us> Cc: freebsd-embedded@freebsd.org Subject: Re: DMA to ATA drive failure Message-ID: <20080828181905.51458f1b.stas@FreeBSD.org> In-Reply-To: <48B4461C.5689.0089.0@pi.avalonnetworks.us> References: <48B4461C.5689.0089.0@pi.avalonnetworks.us>
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--Signature=_Thu__28_Aug_2008_18_19_05_+0400_YRxs78LrET=H//pi Content-Type: text/plain; charset=US-ASCII Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Tue, 26 Aug 2008 18:08:09 -0600 "Marauder" <marauder@pi.avalonnetworks.us> mentioned: > Hi, >=20 > I have a system that needs to directly access the local storage device in= are machine (In this case it is a ATA hard disk). To do that we are use co= de similar to this >=20 > storageFD =3D open("/dev/ad4", O_RDWR); > if (write(storageFD, configBlock, 512) =3D=3D -1) { > cout << "Error" << endl; > } >=20 > We currently make sure we are writing to the disk in full sector sizes (5= 12 in this case) and im sure we have the disk open for write. >=20 > But for some reason on some machines that we do this on we get the follow= ing error displayed from the kernel. "Aligned DMA transfer attempted. ad4: = Setting up DMA failed" We have tried adding "SET hw.ata.ata_dma=3D0" in are= loader.rc file with no luck. >=20 > Any help would be greatly appreciated > Thanx What does atacontrol displays for the disk attached? And what hardware do you use? --=20 Stanislav Sedov ST4096-RIPE --Signature=_Thu__28_Aug_2008_18_19_05_+0400_YRxs78LrET=H//pi Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.9 (FreeBSD) iEYEARECAAYFAki2s94ACgkQK/VZk+smlYH6sQCeIG/FAJr/MViRPwl0GmJIlVd0 hOoAn3kMRys0s1DtO/2KiSt3UsrpNqmM =qZ9f -----END PGP SIGNATURE----- --Signature=_Thu__28_Aug_2008_18_19_05_+0400_YRxs78LrET=H//pi--
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