asynchronus I/O (aioserver)

creating raw logical volumes

Any logical volume that doesn't have filesystem on it is raw logical volume.

some applications like oracle,informix needs and  uses  raw`LV's.

***Every logical volume you are creating will have two entries in /dev  directory i.e. one block device and one character device.

suppose yours application team asks for some raw LV'S . i.e. oracle team.

step1:  let me create one LV named "list"

 step 2: goto /dev  directory and check that device files are available.

 #cd /dev


# ls -l list
brw-rw----   1 root     system       10, 11 Oct 04 15:27 list
# ls -l rlist
crw-rw----   1 root     system       10, 11 Oct 04 15:27 rlist
#

here we see that the block device is having the name same as the logical device name"list" . but the chacter device is having the name "rlist"

step 3:  now we have to change the ownership  of the file rlist to oracle:oracle  ,so that it can be used by oracle team.

#chown  oracle:oracle   /dev/ rlist