Messages in this thread | | | Date | Mon, 2 Aug 2004 16:50:40 +0200 | From | Jens Axboe <> | Subject | Re: ide-cd problems |
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On Mon, Aug 02 2004, tabris wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > On Monday 02 August 2004 9:56 am, Jens Axboe wrote: > > On Mon, Aug 02 2004, tabris wrote: > > > On Sunday 01 August 2004 11:57 am, Jens Axboe wrote: > > > > On Sun, Aug 01 2004, Alexander E. Patrakov wrote: > > > > > Zinx Verituse wrote: > <snip> > > > > Don't ever use that interface, period. It's not just the cdrecord > > > > code that may be alpha (I doubt it matters, it's easy to use), > > > > the interface it uses is not worth the lines of code it occupies. > > > > > > Then we have a severe disagreement between the cdrecord code (or > > > at least the runtime warnings) and the Linux-Kernel IDE folks. > > > specifically, these lines, while running with cdrecord > > > dev=/dev/cdrom > <snip> > > Warning: Open by 'devname' is unintentional and not supported. > > > > just says that open-by-device name is unintentional, it doesn't give > > you warnings on the transport. > > > > So in short (and repeating): don't use ATAPI (CDROM_SEND_PACKET), it > > sucks. Use SG_IO (which means using open-by-device, which works at > > least as well as the stupid faked ATAPI bus/id/lun crap and has the > > much better transport). Don't compare apples and oranges. > I'll take your point on the technical merits. > > But now I get to wondering what to do about all the old HOWTOs. the > cdrecord folks aren't helping. > > Maybe instead what should be done is a BIG FAT WARNING in the syslog? > that the CDROM_SEND_PACKET interface is deprecated in kernel 2.6? I > know that I personally can listen and take your advice, but I worry > more about the rest of the users, who either will not hear, or will > hear too many conflicting things. Perhaps it won't help, but I'd > really like to be able to sell this stuff. And among the necessary > things is to be able to have sane warnings, and not have warnings that > will scare my customers off!
CDROM_SEND_PACKET isn't anymore deprecated in 2.6 than it is in 2.4. It's equally silly to use it with cdrecord in either kernel. In hind sight, adding that interface was a mistake. It was never meant for anything serious like a cd burning interface. It lacks good error reporting, and it basically could not do worse when it comes to performance. So if you are in 2.4, use ide-scsi! If you are in 2.6, use ide-cd with SG_IO (eg ATA: method from cdrecord). As it was mentioned a little up in this thread, you can actually use x,y,z naming to adresse your given devices, if you have some weird urge to do so. This will kill the open-by-devname warning from cdrecord. Or you can just ignore this warning, it means absolutely nothing.
> Yes, this isn't really your (you==Jens) problem, but probably the > distro maintainers (cc:d ArkLinux) to put in patches silencing some of > these warnings, and/or change the default behaviour of their front-end > tools.
And we did, SUSE killed that stupid warning :-)
> I merely hope to find some sanity. Though I have a feeling I'm looking > in the wrong places (Free and Open Source).
Like any other place, free/open source communities have their sane and insane members.
-- Jens Axboe
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