3.6 Definition of interleaving

An example of an interleaved definition is shown below.

                                                    File source Extent ┌────────────┐
    FileInterleave 3 1 ┌ ← ASRC │ AAAAAAAAAAAAA│
        File AFILE │ └────────────┘
            FileSource ASRC │ ┌────────────┐　
            EndFileSource ├ ← BSRC │ BBBBBBBBBBBBB│
        EndFile │ └────────────┘　  
    EndFileInterleave │
    FileInterleave 1 3 │ │ ← −−− Extent −−− → −−
       File BFILE │ ┌────────────────　
           FileSource BSRC └ → │ AAABAAABAAABAAA
           EndFileSource └────────────────　             
        EndFile               
    EndFileInterleave         
EndExtent                     

List

Title Command specifications

Command Start of extent definition

Keyword Extent

No 6.1

Form

Extent [relpos]

Parameters

relpos: position on disk to record extents (relative time in session, optional)

function

Start defining extents.

List

Title Command specifications

Command End of extent definition

Keyword EndExtent

No 6.2.

Form

EndExtent

Parameters

none

function

Exits the extent definition.

List

Title Command specifications

Command Start file interleaved definition

Keyword FileInterleave

No 6.3

Form

FileInterleave usize gsize

Parameters

usize: number of sectors in the unit

gsize: number of sectors in the gap

function

Starts the file interleaved definition.

List

Title Command specifications

Command End of file interleaved definition

Keyword EndFileInterleave

No 6.4

Form

EndFileInterleave

Parameters

none

function

Terminates the file interleave definition.

List

Title Command specifications

Command Start channel definition

Keyword Channel

No 6.5 6.5

Form

Channel chno

Parameters

chno: Channel number (0 to 255)

function

Start the channel definition.

List

Title Command specifications

Command End of channel definition

Keyword EndChannel

No 6.6

Form

EndChannel

Parameters

none

function

Finish the channel definition.

List

Title Command specifications

Command File relocation specification

Keyword Reallocation

No 6.7

Form

Reallocation

Parameters

none

function

If another file has already been specified at the position where you tried to place the file, move it back and rearrange it so that it does not overlap with the previously specified file.