scsi(7) DG/UX R4.11 scsi(7)
NAME
scsi - Device-independent SCSI
SYNOPSIS
scsi(parent-bus[,id[,lun]])
DESCRIPTION
The scsi device driver accesses any Small Computer System Interfaces
device. It allows user space applications to issue commands to a
generic SCSI device that has been configured in the system with this
driver. The scsi driver supports the open, close and ioctl system
calls. The latter are described in the file
/usr/include/sys/intdguserscsiioctl.h.
To configure an scsi device, you must add a device name entry of the
form described above to the DG/UX system configuration file. The
parameters in a device name have the following meanings:
· The parent-bus parameter is itself a device name, representing
the SCSI bus device to which the device is attached (ncsc(0) or
dgsc(vme(1),B,6), for example). There is no default value for
this parameter; it must always be specified explicitly. See the
scsibus(7) man page for a list of SCSI bus device drivers.
· The id parameter is a hexadecimal number in the range 0 through F
which represents the SCSI ID used by the device on parent-bus.
The default value for id is 0. Note that id values above 7 are
possible only if the parent-bus device supports Wide SCSI
addressing. Consult your hardware documentation to determine if
it does.
· The lun parameter is a hexadecimal number in the range 0 through
7 which represents the SCSI Logical Unit Number (LUN) used by the
device within its id. The default value for lun is 0.
FILES
Each scsi device creates a single character-special device node when
it is configured, with the pathname:
/dev/scsi/scsi(parent-bus,id,lun)
EXAMPLES
The following entry in a DG/UX configuration file configures a
generic SCSI device at Logical Unit Number 0 of SCSI ID 3 on the SCSI
bus named ncsc(1):
scsi(ncsc(1),3)
SEE ALSO
scsibus(7).
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