On Mon, Jul 13, 2009 at 2:17 AM, Alexander Motin<m...@freebsd.org> wrote: > Carlos A. M. dos Santos wrote: >> >> On Fri, Jul 10, 2009 at 5:31 AM, Scott Long<sco...@samsco.org> wrote: >>> >>> Poul-Henning Kamp wrote: >>>> >>>> In message <200907100818.n6a8i8p1011...@svn.freebsd.org>, Scott Long >>>> writes: >>>> >>>>> ATA drives are accessed via 'ada' device nodes. >>>> >>>> It there a particular good reason why we insist on making this >>>> silly mistake every five years ? >>>> >>>> I am pretty sure you were around when Justin won friends by renaming >>>> the SCSI disk devices ? >>> >>> 1. I clearly stated that the name is experimental and that a change in >>> the future is possible. >> >> Well, from a user's perspective, if CD/DVD drives are to be seen as >> 'cdX', then it would make sense that hard disks were seen as daX, as >> already advertised by cam(4). > > cdX implemented by cd(4) driver in both cases uses the same SCSI command > set. In ATA case, SCSI commands are just wrapped within ATAPI PACKET > command. For disks, situation is completely different, as ATA disks have > completely different command and feature set. So da(4) is a driver for SCSI > command set devices and ada(4) is a driver for ATA command set devices.
I know, but that is the driver's perspective, not the user's perspective. -- My preferred quotation of Robert Louis Stevenson is "You cannot make an omelette without breaking eggs". Not because I like the omelettes, but because I like the sound of eggs being broken. _______________________________________________ svn-src-all@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
