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@(#)drum.4 6.1 (Berkeley) 05/15/85

C 4 drum - paging device 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. /dev/drum 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.