This may be a sore subject, but does this new sg interface settle all the
issues raised by this document?:
http://www.fokus.gmd.de/research/cc/glone/employees/joerg.schilling/private/sg.text
I hope so,
Kenneth
On Wed, 20 Oct 1999, Douglas Gilbert wrote:
> charles anderson wrote:
> >
> > The generic scsi documentation says group 6 (device-specific)
> > commands, with operation code 0xC0, must be 12-byte commands. When I
> > 'write" an sg struct containing a 12-byte 0xC0 command, it returns
> > okay, but when I 'write' on sg struct containing a 6-byte 0xC0
> > command, it returns a -1 return code. My problem is that the device I
> > am controlling is designed for 6-byte 0xC0 commands. What can I do to
> > pass the 6-byte commands through to the device? I am using an Adaptec
> > 1480 pcmcia card with the aic7xxx driver.
>
> Chuck,
> There is an awkward way around that with the SG_NXT_CMD_LEN
> ioctl() in kernels 2.2.10 and above. The documentation you
> should be reading is in the kernel source tree, probably at
> /usr/src/linux/Documentation/scsi-generic.txt . It discusses
> that command.
>
> If you feel adventurous then try the new sg interface at
> http://www.torque.net/sg [follow interface link]
>
> It has just been updated and amongst other things makes a
> fair amount of information available in the /proc/scsi/sg
> directory and does direct IO. [The latter needs some symbols
> exported.]
>
> Doug Gilbert
>
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