man/man4/rp.4

.th RP IV 10/15/73
.sh NAME
rp \*- RP-11/RP03 moving-head disk
.sh DESCRIPTION
The files
.it "rp0 ... rp7"
refer to sections of RP disk drive 0.
The files
.it "rp8 ... rp15"
refer to drive 1 etc.
This is done since the size of
a full RP drive is 81200 blocks and
internally the system is only capable
of addressing 65536
blocks.
Also since the disk is so large,
this allows it to be broken up
into more manageable pieces.
.s3
The origin and size of the pseudo-disks on each drive are
as follows:
.s3
.br
        disk    start   length
.br
        0       0       40600
.br
        1       40600   40600
.br
        2       0       3200
.br
        3       3200    39000
.br
        4       42200   39000
.br
        5-7     unassigned
.sh FILES
/dev/rp?
.sh BUGS