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    • 1. 发明授权
    • Storage device having head IC confirmation processing
    • 具有头IC确认处理的存储装置
    • US06377415B2
    • 2002-04-23
    • US09316906
    • 1999-05-21
    • Kazuyoshi AkutsuHiroyuki Tanaka
    • Kazuyoshi AkutsuHiroyuki Tanaka
    • G11B1512
    • G11B5/486
    • The storage device according to the present invention comprises head ICs 1171 and 1172 provided in correspondence to a plurality of magnetic disks 1111 and 111n. When selected, the head IC 1171 outputs a first IC current I1 and the head IC 1172 outputs a second IC current I2. A current/voltage converting circuit 132 converts a synthesized current I0 obtained by synthesizing the first IC current I1 and second IC current I2 to a corresponding IC voltage Vic. A voltage comparing circuit 134 compares a reference voltage Vr to an IC voltage Vic and outputting a result of comparison as a comparison result voltage Vc. A HDC circuit 121C outputs a select command Cs for selecting all IC heads, when a power is turned ON, to the control circuit 125C. The HDC circuit 21C also confirms according to the comparison result voltage Vc whether the number of head ICs is one or two.
    • 根据本发明的存储装置包括对应于多个磁盘1111和111n设置的头IC117和1172。 当选择时,头IC1171输出第一IC电流I1,头IC1172输出第二IC电流I2。 电流/电压转换电路132将通过合成第一IC电流I1和第二IC电流I2获得的合成电流I0转换为相应的IC电压Vic。 电压比较电路134将参考电压Vr与IC电压Vic进行比较,并输出比较结果作为比较结果电压Vc。 HDC电路121C在电源接通时向控制电路125C输出用于选择所有IC头的选择指令Cs。 HDC电路21C还根据比较结果电压Vc确定头IC的数量是一个还是两个。