Date: Fri, 04 Oct 2002 21:51:25 +0200 From: Poul-Henning Kamp <phk@critter.freebsd.dk> To: obrien@FreeBSD.org Cc: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: Re: cvs commit: src/sys/cam/scsi scsi_cd.c Message-ID: <70908.1033761085@critter.freebsd.dk> In-Reply-To: Your message of "Fri, 04 Oct 2002 12:42:48 PDT." <20021004194248.GA23759@dragon.nuxi.com>
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In message <20021004194248.GA23759@dragon.nuxi.com>, "David O'Brien" writes: >On Fri, Oct 04, 2002 at 06:33:31AM -0700, Poul-Henning Kamp wrote: >> Log: >> Unhook the SCSI CD driver from the disk "mini-layer" and/or GEOM. >> SCSI disks are too square pegs for the round holes in both of these. >> >> And since atapi-cd has clearly shown that there are better acccess >> models for CD media than trying to pretend to be a classical disk, >> we stop the masquerade rather than patch up the costume. > >It would be nice if atapi-cd would DTRT as the SCSI-CD does: > > # dd if=/dev/acd0 of=blah > dd: /dev/acd0: Invalid argument > 0+0 records in > 0+0 records out > 0 bytes transferred in 0.000081 secs (0 bytes/sec) > >SCSI works, where I have to explicitly state "bs=2048" for atapi-cd. Depends on your drive, for both SCSI and ATAPI. I belive sos@ told me he had an ATAPI drive which could do 512. I certainly have a SCSI drive which cannot do 512. 512byte emulation was a hack Sun paid to have invented so that they could hook CD's onto existing machines and use them. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 phk@FreeBSD.ORG | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe cvs-all" in the body of the message
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