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Control device and disk device

A control device, a technology of a magnetic disk device, which is applied to the recording of information on a magnetic disk, magnetic recording, configuration/installation of recording heads, etc., and can solve problems such as power consumption

Active Publication Date: 2021-10-15
KK TOSHIBA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] However, if the voltage is set in accordance with the outer peripheral side where the voltage of the core power supply is high, the disk reading and writing in the low transfer speed area on the inner peripheral side of the disk where the high voltage should not be required, and during idling , set an excessively high voltage, which becomes the main cause of unnecessary power consumption

Method used

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  • Control device and disk device
  • Control device and disk device
  • Control device and disk device

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no. 1 Embodiment approach

[0019] Embodiments will be described below with reference to the drawings. In addition, the disclosure is merely an example, and the invention is not limited by the contents described in the following embodiments. Modifications that can be easily conceived by those skilled in the art are of course included within the scope of the disclosure. In order to clarify the description, in the drawings, the size, shape, etc. of each part may be schematically changed from those of the actual embodiment. In a plurality of drawings, the same reference numerals are attached to corresponding elements in some cases, and detailed descriptions thereof are omitted.

[0020] figure 1 It is a diagram showing an example of a schematic configuration of the magnetic disk device 1 .

[0021] Such as figure 1 As shown, the magnetic disk device 1 includes a Soc (System on Chip) 10 , a switching regulator 20 , a memory 30 , and a magnetic disk unit D. As shown in FIG. The Soc 10 includes a CPU 11 a...

no. 2 Embodiment approach

[0048] In addition, in the case of random reading / writing of data from the magnetic disk 40, for example, when switching from the outermost zone 0 to the innermost zone 9, etc., when there is a large difference in the switching target DRO count, the Assume that the switching of the target VDD voltage does not catch up with the seek operation to the next area. In particular, when the VDD voltage is increased, the VDD voltage becomes insufficient, and the data transfer speed may not catch up. In this embodiment, a case will be described in which the time required for voltage correction is calculated before the reading / writing of the previous area is completed, and the target DRO count is set in the VDDFB control circuit 13 in advance taking this time into consideration. In addition, the same code|symbol is attached|subjected to the same structure as said 1st Embodiment, and detailed description of them is abbreviate|omitted.

[0049] Figure 6 It is a diagram showing an exampl...

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Abstract

Embodiments provide a control device and a magnetic disk device capable of appropriately setting the voltage of a power supply. According to an embodiment, a control device for a magnetic disk device includes a power control unit and a control unit. The power supply control unit changes the output voltage value of the voltage supplied from the power supply to the control device based on the voltage control parameter. The control unit sets, in the power supply control unit, a voltage control parameter provided corresponding to the zone when the magnetic head accesses the zone set on the magnetic disk.

Description

[0001] This application enjoys the priority of the basic application based on Japanese Patent Application No. 2019-48721 (filing date: March 15, 2019). This application incorporates all the contents of the basic application by referring to this basic application. technical field [0002] Embodiments relate to a control device and a magnetic disk device. Background technique [0003] In the magnetic disk device, as a technology for supplying power to the control device, the following technologies are known: a technology of preparing a plurality of external power supplies and switching the power supply to the control device by hardware; A technology that switches the power supply to the control device with multiple voltage-dividing resistor circuits and by hardware. [0004] However, in all of the above-mentioned techniques, it is necessary to add an external circuit, and it is impossible to perform fine voltage control on the order of several mV due to variations in componen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B5/55
CPCG11B5/5569G06F1/3268G06F1/3221G11B5/012G11B5/5547Y02D10/00Y02D30/50G11B19/041
Inventor 竹田由彦
Owner KK TOSHIBA