Installation guide

Modify each disk entry, as desired, to use the para-virtualized by changing the driver

elements as shown below.

</disk>

Once complete, save the modified configuration file and restart the guest.

8. Boot the virtual machine:

# xm start YourGuestName

Where YourGuestName is the name of the configuration file or the guest operating system's

name as defined in its configuration file in the name = "o s_n ame" parameter.

Warning

The para-virtualized drivers are not automatically added and loaded to the system because

weak-modules and modversions support is not provided in Red Hat Enterprise Linux 3. To

insert the module execute the command below.

insmod xen_vbd.ko

Red Hat Enterprise Linux 3 requires the manual creation of the special files for the block devices

which use xen-vbd. The steps below will cover how to create and register para-virtualized block

devices.

Use the following script to create the special files after the para-virtualized block device driver is

loaded.

#!/bin/sh

module="xvd"

mode="664"

major=`awk "\\$2==\"$module\" {print \\$1}" /proc/devices`

# < mknod for as many or few partitions on xvd disk attached to FV guest >

# change/add xvda to xvdb, xvbd, etc. for 2nd, 3rd, etc., disk added in

# in xen config file, respectively.

mknod /dev/xvdb b $major 16

mknod /dev/xvdb1 b $major 17

mknod /dev/xvdb2 b $major 18

chgrp disk /dev/xvd*

chmod 0660 /dev/xvd*

For each additional virtual disk, increment the minor number by 16. In the example below an

additional device, minor number 16, is created.

# mknod /dev/xvdc b $major 16

# mknod /dev/xvdc1 b $major 17

This would make the next device 32 which can be created by:

Red Hat En t erp rise Lin ux 5 Virt ualizat ion Guid e

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