svn commit: r195534 - in head: etc/mtree include lib/libcam
sbin/camcontrol share/man/man4 sys/cam sys/cam/ata sys/cam/scsi
sys/dev/advansys sys/dev/ahci sys/dev/aic7xxx sys/dev/amd sys/de...
Carlos A. M. dos Santos
unixmania at gmail.com
Mon Jul 13 12:46:51 UTC 2009
On Mon, Jul 13, 2009 at 2:17 AM, Alexander Motin<mav at freebsd.org> wrote:
> Carlos A. M. dos Santos wrote:
>> On Fri, Jul 10, 2009 at 5:31 AM, Scott Long<scottl at samsco.org> wrote:
>>> Poul-Henning Kamp wrote:
>>>> In message <200907100818.n6A8I8p1011853 at svn.freebsd.org>, Scott Long
>>>>> 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.
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