INTRLVE(4)          UNIX Programmer's Manual           INTRLVE(4)

NAME
     intrlve - file system interleaving

DESCRIPTION
     File system interleaving is achieved by encoding information
     in the minor device numbers of the disks across which the
     interleaving is to take place.

     The octal representation of the minor device number is
     encoded _i_d_p, where _i is an interleave flag, _d is a physical
     drive number, and _p is a partition (subsection) within a
     physical unit.  If _i is 0, no interleaving takes place.  If
     _i is 1, the minor device consists of the specified partition
     on drives number 0 through _d-_1 and successively numbered
     blocks are distributed across the drives in rotation.

SEE ALSO
     dvhp(4), hk(4), hp(4), rm(4), rp(4), xp(4)

DIAGNOSTICS
     None.

BUGS
     Raw device drivers don't work on interleaved devices.  Thus
     any file system maintainance program must refer to disk
     files by their block (non-raw) names.  Some programs (not-
     ably _f_s_c_k(8)) automatically translate a block device name to
     its raw counterpart and will fail miserably.

Printed 5/17/83                                                 1