PowerBase Freezes on Boot with Scanner Connected- Internal IDE HD

Power Computing provided the information in this article and it was deemed accurate as of 14 November 1997. Apple Computer, Inc. is not responsible for its content. This article is being provided as is and will not be updated in the future.

When I try to start-up my PowerBase with my scanner connected, the computer freezes. With the scanner disconnected, the computer boots fine. I have an IDE internal hard drive. What is wrong?
Apple has identified this as a SCSI Manager issue in the Alchemy ROM. Apple has released the 6360/64xx/54xx Update 1.0 to resolve this issue.

This update, among other things, installs a SCSI Manager fix on the Patch Partition of Drive Setup formatted (IDE)hard drives. As FWB's Hard Disk Toolkit does not support the Patch Partition, the SCSI Manager update cannot be installed on FWB formatted drives including Power Computing SCSI drives. As Power Computing uses Drive Setup to format its IDE drives, the fix should correctly install on computers with IDE drives installed. Customers with SCSI drives will not be able to install the 6360/64xx/54xx Update.

Engineering has created the SCSI Manager Update application to resolve this issue on PowerBase computers with only SCSI hard drives installed. Customers can obtain the upgrade by downloading it from:

ftp://support.powercc.com/pub/SCSI_Manager_Update.sea.hqx.

This will work with one known caveat. If there is no IDE hard drive installed, the update must be installed on the SCSI boot device (the volume selected in the Startup Disk control panel) to prevent the freeze. If the update is not installed on the SCSI boot device, and no IDE drives are connected, the computer will hang on boot. To prevent this, customers will need to update all possible SCSI boot devices with the new HDT driver.

Machines Affected: PowerBase
Published Date: Feb 20, 2012