[georgipa]

Hi.

I need create a raw device in linux to database in infromix dymanic server, please yuo can send me an example for this activity.

Thank you.

[Roelwe]

Here are the steps to configure your Linux machine for rawio.

First, you have to have a partition that is unmounted. I did this by
reinstalling RedHat and not allocating all of my second hard drive. You can
use fdisk to do this.

Here is fdisk /dev/hdb

Command (m for help): p

Disk /dev/hdb: 255 heads, 63 sectors, 1655 cylinder

Units = cylinders of 16065 * 512 bytes

Device Boot Start End Blocks Id System
/dev/hdb1 * 1 1020 8193118+ 83 Linux

I then created an extended partition with the n option.
/dev/hdb2

Then I created logical paritions inside the Extended partition with the n
option. It will prompt you for the cylinder to start and stop (I calculated
the size I wanted based on the cylinder size, there probably is an easier way)

/dev/hdb5
/dev/hdb6
/dev/hdb7

So now:

Command (m for help): p

Disk /dev/hdb: 255 heads, 63 sectors, 1655 cylinders
Units = cylinders of 16065 * 512 bytes

Device Boot Start End Blocks Id System
/dev/hdb1 * 1 1020 8193118+ 83 Linux
/dev/hdb2 1021 1655 5100637+ 5 Extended
/dev/hdb5 1021 1270 2008093+ 83 Linux
/dev/hdb6 1271 1521 2016126 83 Linux
/dev/hdb7 1522 1655 1076323+ 83 Linux

Then make sure you exit properly:

Command (m for help): w

MAKE SURE YOU REBOOT AFTER THIS STEP

Once the system is back up you need to create the raw devices.

first make sure your devices are there:

ls -l /dev/hdb[5-7]
brw-rw---- 1 root disk 3, 69 May 5 1998 /dev/hdb5
brw-rw---- 1 root disk 3, 70 May 5 1998 /dev/hdb6
brw-rw---- 1 root disk 3, 71 May 5 1998 /dev/hdb7

Then create the raw devices by:

raw /dev/raw/raw1 /dev/hdb5
raw /dev/raw/raw2 /dev/hdb6
raw /dev/raw/raw3 /dev/hdb7

Then change the owner:group to informix; if this is for use by informix.
Then Verify them with:

raw -qa
/dev/raw/raw1: bound to major 3, minor 69
/dev/raw/raw2: bound to major 3, minor 70
/dev/raw/raw3: bound to major 3, minor 71

and ls -l /dev/raw/raw[1-3]
crw-rw---- 1 informix informix 162, 1 Oct 4 1999 /dev/raw/raw1
crw-rw---- 1 informix informix 162, 2 Oct 4 1999 /dev/raw/raw2
crw-rw---- 1 informix informix 162, 3 Oct 4 1999 /dev/raw/raw3

Notice that the raw -qa binds to the major and minor of the hdb[5-7] devices.

**Note: Theses raw devices to not stay once the system is rebooted. I created
a script to do this for me and put it in the init(rc) files.

The devices are ready.

To use Informix with this you simply need to create a link to point to the raw
device.

ln -s /dev/raw/raw1 /opt/chunks/rootchunk

ls -l /opt/chunks/rootchunk
lrwxrwxrwx 1 informix informix 13 Sep 15 14:14 /opt/chunks/rootchunk -> /dev/raw/raw1

If oninit gives you an error stating that /opt/chunks/rootchunk will not fit in
the device, or something to that effect, then that means you forgot to reboot
after you created the partitions.

[georgipa]

Hi,

You can send me this file to look what to do in this file.

Thank you.