drum(4) - NetBSD Manual Pages

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DRUM(4)                 NetBSD Kernel Interfaces Manual                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


HISTORY

     The drum special file appeared in 3.0BSD.


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.

NetBSD 10.99                     June 5, 1993                     NetBSD 10.99