7.2.1 Views

• Raw filesystem

This section defines a tree of views (see "Setting up views" on page 69). The views are enclosed in the following structure in server.cfg:
[drive { <letter> }]
views {
list { <view_1> <view_2> ... <view_n> }
roots {
<view_1> { ... }
<view_2> { ... }
...
<view_n> { ... }
}
}
The views section may be preceeded by drive { <letter> }. All the views definded in server.cfg will be available as subdirectories of this drive letter <letter> (e. g., X) under Windows NT. The drive letter is ignored under UNIX.
The list section lists the names of any number of views (<view_1> to <view_n>), The roots section gives a definition for each view of the list section. The definition is a selection of the following sections:

If a view is not to contain disks but subviews, its definition is another views section. In the next example, the view overview contains a number of subviews:
views {
list { overview }
roots {
overview {
[drive { <letter> }]
views {
list { <subview_1> ... <subview_n> }
roots {
<subview_1> { ... }
...
<subview_n> { ... }
}
}
}
}
}
Another Example:

drive { Z }
views {
list { x y } roots {
x { drive { X } discs { * } label { ALLDISCS } }
y { drive { Y } views {
list { a_m n_z } roots {
a_m { discs { [a-m]* } }
n_z { discs { [n_z]* } }
}
}
}
}

The example above presents all disks under x, some under y/a_m and some under /y/n_z.
x and y are available as NT drives X: and Y:. Z: contains X: and Y:.
X: is labeled "ALLDISCS", other drives have the default label "JUKEMAN".
Under UNIX, presented directories are /, /x, /y, /y/a_m, /y/n_z.
Note, that you must create empty directories /x, /y, /y/a_m, /y/n_z and export them to see the disks after an appropriate NFS mount command on port 4027 (see "Integrating iXOS-JUKEMAN into the network" on page 81).

Raw filesystem

In the raw file system, each is disk is represented through the following directory structure:

The tracks directory contains audio data of the audio file system, which is implemented for Plextor drives only. For more information see medium\readme.txt and "Audio file system" on page 165.
The volume directory contains several views on the disk data:

1. For read access in the cached directory the data cache will be used (see "The data cache" on page 38). Write access, however, will be done directly on the SCSI device or hard disk image.
2. In the direct directory all write and read accesses will be done directly on the SCSI device or hard disk image.

The files stupid and clever in the cached/direct directories both contain all data of a disk in a large file:

The raw file system can be used, for example, to easily make ISO images on hard disk or to copy disks.