Technical data

Appendix A: Boot Device Installation 151
ATTENTION Possible data corruption – When you start from the storage array,
there must be only a single path to the storage array when RDAC is removed. The path
must be to the controller that owns the boot volume. If the host is permitted to start
without RDAC and still has dual paths to the storage array, the data might become
unusable.
2. Boot the host system.
3. Go to “Preparing the Host" on page 151.
Preparing the Host ATTENTION Possible loss of access to the boot device and the operating system
– After you install the boot device, never delete the volume mapped to LUN 0 or select
Configure >> Reset Configuration. Performing these actions causes loss of access to
the boot device and the operating system.
In this procedure, the default boot path refers to controller A, which owns the boot
volume. The alternate boot path refers to controller B.
1. Enable the BIOS on the HBA that is connected to the default boot path.
For procedures about how to enable the HBA BIOS, refer to the host system
documentation and the HBA documentation. After the BIOS is enabled, the host
reboots automatically.
2. Make sure that the HBA with enabled BIOS is connected to the default boot path
(controller A), and the HBA with disabled BIOS is connected to the alternate
boot path (controller B).
3. Install the operating system on the host.
4. After the installation is complete, restart the operating system.
5. To enable the alternate path to the storage array, complete the steps in
"Completing the Installation Process" on page 151.
Completing the
Installation Process
This procedure completes the root-boot environment setup. Use this procedure to
restart the system or set the path for the command line interface (CLI), if necessary.
1. Do you want to install the software in a root-boot environment?
— Ye s – Go to step 2.
— No – Go to step 5.
2. Based on the method that you used to disable the alternate path in “Ensuring a
Single Path to the Storage Array on page 150, perform one of these actions to
enable the alternate path to the storage array:
— You removed the host interface cable to the storage array –
Reattach the host interface cable to the alternate controller. Go to
step 5.
— You modified NVSRAM to temporarily disable RDAC multi-path
functionality at the storage array – Go to step 3.