dpj(7)
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dpj Special File
Eclipse MV/family disk subsystem
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DESCRIPTION
A dpj disk subsystem consists of a disk controller with up to
four physical units on that controller. The units supported are
as follows:
Model # Size
6236 354 Mbyte 14" non-removable disk
6239 592 Mbyte 14" non-removable disk
6357 888 Mbyte 14" non-removable disk
6309 725 Kbyte 5 1/4" floppy
6310 38 Mbyte 5 1/4" non-removable disk
6328 70 Mbyte 5 1/4" non-removable disk
6329 120 Mbyte 5 1/4" non-removable disk
6363 160 Mbyte 5 1/4" non-removable disk
6446 240 Mbyte 5 1/4" non-removable disk
A physical disk unit may be accessed directly via the special
file nodes in /dev/pdsk and /dev/rpdsk. These nodes are named in
the form:
/dev/[r]pdsk/c<n>d<m>
where <n> is the octal hardware device code of the controller and
<m> is the unit on the controller. The nodes in /dev/pdsk
provide access as a block special device as described in dsk(7).
The nodes in /dev/rpdsk provide access as a character special
device as described in rdsk(7). When accessing a disk through a
/dev/pdsk or /dev/rpdsk node, the operating system performs no
bad block remapping.
FILES
/dev/pdsk/*
/dev/rpdsk/*
SEE ALSO
dsk(7), rdsk(7).
DG/UX 4.00 Page 1
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