HP Web Jetadmin Software Manuale Utente Scaricare il pdf (Pagina 9)

firmware upgrades with qualified images only. Or the administrator can change the

FirmwareUpgrade.config.xml (in HP WebJetadmin 10.4 SR2 and above) file by adding the following:

<type>HP.Imaging.Wjp.Sdk.Core.Framework.ConfigurationItemString</type>

</property>

Note If the above configuration option is already in the file, then only change the value to True.

By default, this file is located in:

C:\Windows\ServiceProfiles\NetworkService\AppData\Local\HP

Inc\HPWebJetadmin\WjaService\config

After changing the value, restart HP Web Jetadmin.

AUTOMATIC UPGRADES USING POLICIES

HP Web Jetadmin can automatically

apply firmware upgrades on devices

through the use of group policies

(Figure 14). A trigger can be set to apply

the policy when a device is either added

to or removed from the group. If the

group is defined as an automatic group,

certain filter criteria can dictate which

devices are automatically added. This

means that discovered devices can be

automatically added to a group and

HP Web Jetadmin can automatically

perform a firmware upgrade on those

devices. Policy actions include upgrading

either the device firmware or HP Jetdirect

firmware to the latest version or a

qualified version in the repository. If more

than one version is qualified, a screen

prompts the user to select a version.

DOWNGRADE THE FIRMWARE

By default, HP Web Jetadmin only offers upgrades of either device firmware or HP Jetdirect firmware.

If older versions of firmware are present in the repository, they are not offered for downgrade. Some

earlier versions of HP Web Jetadmin might have offered firmware downgrades, but downgrades are

now disabled for several reasons. Downgrades of HP Jetdirect firmware require a special .dld image

made specifically for downgrades. If the downgrade of a regular version of HP Jetdirect firmware is

attempted, not all components are rolled back properly to the older versions, causing abnormalities in

behavior. Device firmware is slightly more friendly during attempted downgrades in that new

functionality is erased as old functionality is applied. However, for some devices, DC Controller or JDI

firmware are not rolled back to older versions, causing abnormalities in behavior.

There might be circumstances where users want to downgrade firmware. For example, new firmware

might have disrupted an important feature, creating a need to roll back to the previous version.

Nothing on the device prohibits a downgrade. While HP discourages downgrades, the ability to

downgrade firmware is built into HP Web Jetadmin. The functionality is disabled by default to protect

against accidentally downgrading a fleet of devices, which might have catastrophic consequences. To

enable downgrading firmware, perform the following steps:

Figure 14

—Automatic upgrades using policies

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HP Web Jetadmin Software Manuale Utente Pagina 9

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