drum man page on Ultrix

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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.

Restrictions
       Reads from the drum are not allowed across the interleaving boundaries.
       Because	these  occur only every .5Mbytes or so, and because the system
       never allocates blocks across the boundary, this is usually not a prob‐
       lem.

Files
See Also
       MAKEDEV(8)

								       drum(4)
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