Quantum ATA disk drives have multiple jumper setting options and are used to set specific drive features. The most common settings are used to define the drive as the primary (master) or secondary (slave) drive on the ATA cable. Some Quantum ATA drives may have additional jumper settings used for optional features found on the drive. Listed below are the various jumper options that may be found on Quantum ATA drives and the corresponding feature that they enable. DS Jumper - Drive Select Used to identify the drive as the primary [MASTER] drive in a single or dual drive configuration. This is the factory default setting. SP Jumper - Slave Present Used only when the second [SLAVE] drive in a two-drive configuration does not support DASP. DASP (Drive active / drive 1 present) is a CAM (Common Access Method) defined signal that indicates the presence of a second drive, DASP is used during power on initialization and after a reset. Prior to this definition, products were introduced which did not utilize this method to detect the presence of a second drive. The SP jumper is used on the MASTER drive, with the DS jumper, when the second drive does not support DASP. CS Jumper - Cable Select Only used in systems that support the cable select feature. Cable Select allows for each ATA disk drive to be jumped the same and the position on the cable determines the ID. This requires a special cable and both drives on the interface would have to support this feature. DM Jumper - Drive Mode Only used to provide compatibility mode with Quantum ProDrive 40/80AT disk drives. With the jumper in place, the drive does not use the PDIAG-signal to control Master/Slave communications. PK Jumper - Park [Spare] This jumper does not enable any feature. It is used, instead, to provide a spare location to any jumper removed from the drive during a configuration change. Rsvd Jumper - Reserved This jumper does not enable any customer feature. It should not be used or have a jumper placed on it. | |
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