When Quantum was sufficient unto itself, as opposed to being a part of Seagate, it was mostly into SCSI drives. It certainly seemed to have Apple's ear, or attention, because Quantum drives are probably the commonest to be found in early Macs after the vogue for Conner and Rodime had passed.
Part of Quantum's self-sufficiency was that it offered fewer user-accessible means of configuring drives, and those that it offered were sheltered behind mnemonics that were not explained. Seagate and IBM offered no-nonsense Termination Enable (for on-board ICs to provide active bus termination). Admittedly, the Quantum drives in early Macs were usually the only as well as the physically last drive in a daisy-chain, and passive termination with in-line resistor packs was (barely) adequate. Thus TE is usually not offered on older Quantum drives.
Tomlee59 has described Quantum's A0,A1,A2 system for setting SCSI ID. Once learnt, always remembered, but other manufacturers make the positions clear with ID0,ID1,ID2. Some Quantum drives offer ParK, as in what one does with one's chewing gum overnight. Handy if you happen to have a spare jumper. Product Option was probably more illuminating when a user had opted for a product. And then there was Disable Write, where other makers used Write Protect. Now that Quantum has been reborn as a division of Seagate in the ATA Era, jumpering Quantum drives is no more different than is jumpering any of the other differing manufacturers' different systems.
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Part of Quantum's self-sufficiency was that it offered fewer user-accessible means of configuring drives, and those that it offered were sheltered behind mnemonics that were not explained. Seagate and IBM offered no-nonsense Termination Enable (for on-board ICs to provide active bus termination). Admittedly, the Quantum drives in early Macs were usually the only as well as the physically last drive in a daisy-chain, and passive termination with in-line resistor packs was (barely) adequate. Thus TE is usually not offered on older Quantum drives.
Tomlee59 has described Quantum's A0,A1,A2 system for setting SCSI ID. Once learnt, always remembered, but other manufacturers make the positions clear with ID0,ID1,ID2. Some Quantum drives offer ParK, as in what one does with one's chewing gum overnight. Handy if you happen to have a spare jumper. Product Option was probably more illuminating when a user had opted for a product. And then there was Disable Write, where other makers used Write Protect. Now that Quantum has been reborn as a division of Seagate in the ATA Era, jumpering Quantum drives is no more different than is jumpering any of the other differing manufacturers' different systems.
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