intro(7) DG/UX 4.30 intro(7)
NAME
intro - introduction to DG/UX System special files
DESCRIPTION
Man pages in this section describe various special files
that refer to Data General hardware peripherals and DG/UX
system device drivers. The names of the entries are
generally derived from names for the hardware, as opposed to
the names of the special files themselves. We discuss
characteristics of both the hardware device and the
corresponding DG/UX system device driver where relevant.
Tape device filenames are in the following format:
/dev/rmt/st(adap@c(addr),i,d)[hml][n]
where:
adap is the controller name.
c is the controller device code (in hexadecimal).
addr is the address of the controller (in hexadecimal).
i is the SCSI ID number of the device (if a SCSI
device).
d is the unit number on the controller (starting from
0).
h means high density tape (6250 bpi).
m means medium density tape (1600 bpi).
l means low density tape (800 bpi).
n means do not rewind the tape after closing the device.
For example:
/dev/rmt/st(insc@E(FFF8A000),4,0)mn
If you do not specify h, m, or l, automatic density
selection occurs when reading, and the current setting of
the tape drive is left unchanged when writing.
Disk device filenames are in the following format:
/dev/[r][p]dsk/class[(adap]@c(addr[)],[i],d)
or
/dev/[r][p]dsk/name
where:
r is a character special interface to the disk (as opposed
to block special).
p is a physical disk (as opposed to a logical disk).
class is the disk type (such as sd, cied, cimd, or smd).
adap is the controller name.
c is the controller device code (in hexadecimal) for a
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intro(7) DG/UX 4.30 intro(7)
physical disk.
i is the SCSI ID number of the disk (if it is an SCSI
device).
d is the unit number on the controller (starting at 0) for
a physical disk.
name is the logical disk name (such as root or user).
For example:
cimd@20(FFFFF100,0)
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