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Annotation of researchv10dc/dist/man/v4/man4/rk.4, revision 1.1

1.1     ! root        1: .th RK IV 10/15/73
        !             2: .sh NAME
        !             3: rk  \*-  RK-11/RK03 (or RK05) disk
        !             4: .sh DESCRIPTION
        !             5: .it Rk?
        !             6: refers to an entire RK03 disk as a single sequentially-addressed
        !             7: file.
        !             8: Its 256-word blocks are numbered 0 to 4871.
        !             9: .s3
        !            10: Drive numbers (minor devices)
        !            11: of eight and greater are treated specially.
        !            12: Drive 8+\fIx\fR is the \fIx\fR+1 way
        !            13: interleaving of devices
        !            14: rk0 to rk\fIx\fR.
        !            15: Thus blocks on rk10 are distributed alternately
        !            16: among rk0, rk1, and rk2.
        !            17: .sh FILES
        !            18: /dev/rk?
        !            19: .sh BUGS
        !            20: Care should be taken in using the interleaved files.
        !            21: First, the same drive should not be accessed simultaneously
        !            22: using the ordinary name and as part of an interleaved file,
        !            23: because the same physical
        !            24: blocks
        !            25: have in effect two different
        !            26: names; this fools the system's buffering strategy.
        !            27: Second, the combined files cannot be used for swapping.

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