Dell DX6012S Manuale di installazione e configurazione - Pagina 13

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that the CSN's local time server is less than 15 layers separated from a reliable source and is

therefore reliable enough to serve as an NTP server for the DX Storage on the internal network.

2.5. CSN Hardware Validation

With every boot of the CSN after the initial install, the CSN software checks the validity of the

host hardware. Unauthorized hardware will fail to boot after printing the following error: 'CSN was

unable to authorize the hardware license for this server'. Administrators who receive environment

validation errors for CSN hardware that is believed to be authorized should contact their support

representative.

The CSN supports upgrade from one software version to the next via a script process similar to

initial installation. The CSN will not be functional during the upgrade and will need to be rebooted

after the software is updated so administrators should schedule the upgrade during off peak hours

to ensure DX Storage and DX Content Router activities are not disrupted.

Cancellation of the upgrade mid-process (via Ctrl-C) is not supported and will be prevented if

attempted. If a network or hardware outage interrupts the upgrade, administrators should use the

csn-reset functionality to restore the previous software version and then attempt the upgrade again.

If csn-reset followed by a reinstall does not work for some reason, please contact your support

representative for alternate instructions.

If upgrading a previously installed CSN to a new version, the following steps should be taken:

1. Upgrade the CSN's operating system to RHEL 5.5 if it has not already been upgraded. Similar to

the initial installation, a Red Hat yum repository must be configured and available for upgrade to

proceed.

2. Remove any multi-server configurations that were manually added to the custom

sn<macaddress>.cfg files as multi-server is now automatically configured on the CSN. Please

contact your support representative if you are unsure how or where to do this.

3. Ensure a license file has been published to the DX Storage cluster. Upgrading the software

without fully configuring it first (i.e. installing 1.0 and then immediately installing 2.0 without

configuration) is not supported.

4. Upgrade the CSN software using the same install script and steps described above in the

Installation Steps section. Agree to the reboot option at the end of the installation; the CSN will

not be functional until it has been rebooted. In the interim between upgrade and reboot, the

Netboot component may log errors related to a port conflict. These errors are harmless and will

be resolved with the reboot.

5. From the Netboot page, select the new CAStor version.

6. From the storage console, reboot the DX Storage cluster.

7. Optionally, installations wishing to take advantage of a larger internal network in 2.0 should run

the 'changeinternalnetwork' script described in the Running and Managing Chapter while the

storage cluster is rebooting. Please reference the 'Updating the Internal Interface' section for

complete instructions on updating the internal interface.

After upgrade, no further configuration is required; all existing configuration and service states are

preserved from their previously configured values.

Version 2.0

December 2010