Date: Wed, 12 Jan 2000 17:49:37 -0700 From: "Kenneth D. Merry" <ken@kdm.org> To: Joerg Micheel <joerg@cs.waikato.ac.nz> Cc: sthaug@nethelp.no, grios@ddsecurity.com.br, ohoyer@fbwi.fh-wilhelmshaven.de, freebsd-hardware@freebsd.org Subject: Re: hardware Message-ID: <20000112174937.D93414@panzer.kdm.org> In-Reply-To: <20000113134211.M5228@cs.waikato.ac.nz>; from joerg@cs.waikato.ac.nz on Thu, Jan 13, 2000 at 01:42:11PM %2B1300 References: <387D0354.63159B8@ddsecurity.com.br> <72218.947717759@verdi.nethelp.no> <20000113124314.I5228@cs.waikato.ac.nz> <20000112165428.A93083@panzer.kdm.org> <20000113132414.K5228@cs.waikato.ac.nz> <20000112173358.A93414@panzer.kdm.org> <20000113134211.M5228@cs.waikato.ac.nz>
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On Thu, Jan 13, 2000 at 13:42:11 +1300, Joerg Micheel wrote: > On Wed, Jan 12, 2000 at 05:33:58PM -0700, Kenneth D. Merry wrote: > > > rawio -c 256 causes bad reads on the disk. > > > > What do you mean it causes bad reads? Are there any error message printed > > out? > > 58 [negara] (root) # rawio -c 256 /dev/rda0c > Random read Sequential read Random write Sequential write > ID K/sec /sec K/sec /sec K/sec /sec K/sec /sec > anon Child 1 Bad read at 1291010048: (null) (671942847), iocount 14 > Child 0 Bad read at 1940982272: (null) (671942847), iocount 14 > Child 2 Bad read at 1813053440: (null) (671942847), iocount 14 > Child 5 Bad read at 2025523200: (null) (671942847), iocount 14 > Child 6 Bad read at 2036186624: (null) (671942847), iocount 14 > Child 4 Bad read at 1428914688: (null) (671942847), iocount 14 > Child 3 Bad read at 625769472: (null) (671942847), iocount 14 > Child 7 Bad read at 2126529024: (null) (671942847), iocount 14 > 4249.6 47 ^C > > 256 is the maximum on FreeBSD (according to the manpage). Hmm. And there are no error messages printed on the console? 256 blocks == 128K, so you might be running into some sort of problem with physio, but I would think that anything too big would just get broken up into multiple chunks. Well, I dunno what those errors mean, you'd probably have to talk to Greg or look at the source to decipher them. Ken -- Kenneth Merry ken@kdm.org To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hardware" in the body of the message
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