You may want to disable your JackHammer card if you experience difficulty with a device attached to it. When you disable a SCSI card, such as the JackHammer, your computer no longer has access to any of the devices attached to it. This can be helpful when troubleshooting hardware issues.
To disable the JackHammer card, simply press and hold down the Command-Option-J key combination when you start up your Workgroup Server 9650 until the Happy Mac icon appears. When the card is disabled, any devices attached to it will not be accessible to the computer until you restart the system.
When you disable the JackHammer card, you can still update the card's firmware or set its options with the JackHammer's Control Panel.