The ‘Auxiliary' connector replicates some of the functions contained in the Front Option Jumper Block. The Auxiliary connector signal finition conforms to the SCSI document SFF-8009 Rev 3 with the following exceptions:

The Auto Start and Auto Start Delay pins control when and how the drive can spin up and come ready. When configured for Auto-Startup, the motor spins up after power is applied without the need of a SCSI Start Unit command. For no Auto-Start, a SCSI Start Unit command is required to make the drive spin and be ready for media access operations. When in Auto-Start mode, the drive will delay its start time by a period of time multiplied by its own SCSI address.

Table 2: Auto Start & Delay Pins

If the Write Protect pin is jumpered to ground, the drive will prohibit SCSI commands that alter the customer data area portion of the media from being performed. The state of this pin is monitored on a per command basis.

Enable Active Termination

This function can be enabled by installing a jumper between pins 13 and 14 of the Front Option Jumper Block or connecting pins 9 and 11 of the Auxiliary Connector on 68 SCSI pin models.

Disable T.I. Sync. Negotiation Pin

If a Disable Target Initiated Synchronous Negotiation pin is grounded then an Initiator is required to start a negotiation handshake if Synchronous and/or ‘Wide' (Double Byte) SCSI transfers are desired.

Disable SCSI Parity Pin

Grounding this pin will disable SCSI Parity checking.

Disable Unit Attention Pin

Grounding this pin will disable the drive from building Unit Attention Sense information for commands immediately following a Power On Reset (POR) or SCSI Bus Reset. Any pending Unit Attention conditions will also be cleared at POR or SCSI Reset times.

SCSI Bus Termination Power

Termination power is optionally provided for systems that desire to use it. In order to use the termination power, the user needs to install a jumper between pins 1 and 2 of the TermPower Block. The jumper should only be installed on one device, which should be the last device on the SCSI bus (i.e. the drive that is physically closest to a terminator).

ATTENTION

Your drive installation kit contains parts that allow it to be used with a variety of Acer Altos systems. Not all parts will be used on all systems. For details about installing drives, refer first to your system's User's Guide.

WARNING

This drive can be damaged by Electrostatic Discharge. Please follow recommended ESD procedures before unpacking or handling the drive.