To allocate raw space, you must have a disk partition available
that is dedicated to raw space. To create raw disk space, you can
either repartition your disks or unmount an existing file system.
Back up any files before you unmount the device.
To allocate raw disk space
- Create and install a raw device.
For specific
instructions on how to allocate raw disk space on UNIX, see your operating-system documentation
and Unbuffered or buffered disk access on UNIX.
- Change the ownership and permissions of the character-special
devices to informix.
The file name of the character-special
device usually begins with the letter r. For the
procedure, see steps 4 and 5 in Allocating cooked file spaces on UNIX.
- Verify that the operating-system permissions on the character-special
devices are crw-rw----.
- Create a symbolic link between the character-special device
name and another file name with the UNIX link
command, ln -s. For details, see Create symbolic links to raw devices (UNIX).
Restriction: After you create the raw device that
the database server uses for disk space, do not create file systems
on the same raw device that you allocate for the database server disk
space. Also, do not use the same raw device as swap space that you
allocate for the database server disk space.