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最近,尤尼瓦克公司在其原来位密度为4040位/英寸的 ISS/Univac 8433磁盘驱动器中,采用了新的3PM 编码、cos~4Kf 的读出补偿器和带门槛的峰值检出器等记录系统电路技术,研制成功位密度为6300位/英寸的磁盘新产品 ISS/Univac 8434。为了进一步提高其数据可靠性,还采用了每道允许三个介质缺陷的“缺陷跳越”技术,从而使这种相当于IBM 3330中等性能磁盘的容量可靠地超过了IBM 3350高性能磁盘的容量。
Most recently, Univark introduced a new 3PM coder, a cos ~ 4Kf readout compensator, and a peaked peak detector for ISS / Univac 8433 disk drives at a density of 4040 bits per inch Recording system circuit technology, the successful development of a bit density of 6300 bits / inch disk new product ISS / Univac 8434. To further improve its data reliability, it also uses “defect skipping” technology that allows for three media defects per lane, making this equivalent of the IBM 3330 medium-capacity disk reliably exceeding the capacity of the IBM 3350 high-performance disk .