Messages in this thread | | | Date | Fri, 7 Nov 2003 07:01:22 -0800 (PST) | From | Linus Torvalds <> | Subject | Re: 2.9test9-mm1 and DAO ATAPI cd-burning corrupt |
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On Fri, 7 Nov 2003, Bill Davidsen wrote: > > I mentioned ide tapes and ZIP drives, Linus didn't mention how one gets > around those.
The thing is, the non-ide-scsi interfaces really _should_ work. The fact is, SG_IO ("send a SCSI command") just _works_.
However, right now only the CD-ROM driver exposes those commands. Why? Because nobody has apparently cared enough about those theoretical IDE tapes and ZIP drives.
In other words, they seem to "exist" in the same sense that soubdblaster CD-ROM users "exist". True in theory, but apparently only really useful for theoretical arguments.
Getting SCSI command support is not complicated: you add
ret = scsi_cmd_ioctl(dev, cmd, arg);
to your ioctl routine. Of course, since so far nobody seems to have cared about anything but CD writing, it's not really tested for anything else.
Linus
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