Date: Wed, 8 Dec 2004 07:20:26 -0800 From: Kris Kennaway <kris@obsecurity.org> To: Rob <spamrefuse@yahoo.com> Cc: FreeBSD <freebsd-questions@freebsd.org> Subject: Re: Harddisk speed: PIO4 vs. UDMA66 controller ? Message-ID: <20041208152026.GA14279@xor.obsecurity.org> In-Reply-To: <41B6F66B.9060708@yahoo.com> References: <41B6F1AE.3000906@yahoo.com> <41B6F66B.9060708@yahoo.com>
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--ZGiS0Q5IWpPtfppv Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Wed, Dec 08, 2004 at 09:41:15PM +0900, Rob wrote: > > ad0: 43979MB <IBM-DTLA-307045/TX6OA50C> [89355/16/63] at ata0-master PI= O4 > > acd0: CDROM <CRD-8520B/1.00> at ata1-master PIO4 > > > >The harddisk is very new and can do UDMA100. With a UDMA66 controller > >I expect the harddisk to operate at least at 66 MB/sec. Any ideas why > >the speed is only PIO4? >=20 > I just realize that I have put in /boot/loader.conf: >=20 > hw.ata.ata_dma=3D"0" >=20 > to prevent a WRITE_DMA panic at bootup. > That's probably the reason why the harddisk speed is forced > to PIO4, right? Yes. Kris --ZGiS0Q5IWpPtfppv Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.6 (FreeBSD) iD8DBQFBtxu5Wry0BWjoQKURAmcSAKC+MCg82MRqxybHLaaa7Ar8CXzuNgCcDDbW rIBHV0xno3EkWG9IvF3HrNw= =0pZw -----END PGP SIGNATURE----- --ZGiS0Q5IWpPtfppv--
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