Using CA AppLogic® › Appliance Developer Guide › Creating Appliances › Modifying Appliances to Use SCSI Disks › Modifying Linux Appliances

Modifying Linux Appliances

Existing Linux-based appliances may be converted to use SCSI disks without rebuilding the appliance from scratch.

Important! This procedure is limited and specific to CentOS and RHEL OS.

To convert a Linux-based appliance to use SCSI disks

1. Drag the appliance to an application and branch it.
2. Start the application.
3. Log into the appliance and make the following changes:
   • Add the following lines to /etc/modprobe.conf:

     alias scsi_hostadapter mptbase
     alias scsi_hostadapter1 mptspi
     

   • Get the kernel version and execute the following command:

     uname -r
     

4. Update the initrd.

   Given a kernel version of 2.6.18-194.32.1.el5PAE as an example, execute the following command:

   mkinitrd -v -f /boot/initrd-2.6.18-194.32.1.el5PAE.img 2.6.18-194.32.1.el5PAE
   

5. Update the following files to change any references to /dev/hd* to /dev/sd*:
   • /etc/fstab
   • /boot/grub/grub.conf
   • /boot/grub/menu.lst
6. Stop the application.
7. Open the application in the infrastructure editor, right-click the appliance, and select Modify Boundary.
   • On the General tab, click the options button and modify the device schema to ‘/dev/sdX*’.
   • On the Volumes tab, Select ‘sd*’ for each of the volumes.
   • Click OK to save the changes.
8. Save and close the application.
9. Start the application.