4.3BSD - /usr/man/cat4/drum.0

DRUM(4)                                                                DRUM(4)


NAME
       drum - paging device

DESCRIPTION
       This  file  refers to the paging device in use by the system.  This may
       actually be a subdevice of one of the disk drivers,  but  in  a  system
       with  paging  interleaved  across  multiple  disk drives it provides an
       indirect driver for the multiple drives.

FILES
       /dev/drum

BUGS
       Reads from the drum are not allowed across the interleaving boundaries.
       Since these only occur every .5Mbytes or so, and since the system never
       allocates blocks across the boundary, this is usually not a problem.


4th Berkeley Distribution        May 15, 1985                          DRUM(4)