JPH03259453A - Electronic device system - Google Patents

Abstract

PURPOSE:To reduce an electric power consumption during the use of a DC power source and to shorten the time for disk access during the use of an AC power source by deciding whether the power source is an AC power source or DC power source and executing the disk access by the operation flow suitable respectively for these power sources. CONSTITUTION:Whether the power source is the AC power source or DC power source is decided. A disk spindle is rotated and the disk access is executed if there is a request for disk access after waiting for the stabilization of the rotation during the use of the AC power source. Whether the presence or absence for the request for the disk access is decided and the disk spindle is rotated if there is the request for the disk access, then the disk access is executed after waiting for the stabilization of rotation and the rotation of the spindle is topped unless there is the next disk during the use of the DC power source. The time required for the disk access is shortened in this way at the time of the AC power source and the electric power consumption by the disk access is reduced at the time of the DC power source.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention relates to a disk system (hereinafter referred to as disk system) in an electronic device system that uses both AC and DC sources.
It is related to.

[Conventional technology]

FIG. 2 shows a flowchart of the operation of a conventional AC/DC@79 combined disk system.

Next, the operation will be explained. First, in step 1, power is turned on. If there is a disk access request in a subsequent step, the disk drive spindle rotation is started (step 3), and after passing through the stabilization wait step 4,
Perform disk access (step 5). After executing the disk access, the presence or absence of the next disk access request is checked in step 6. If there is, the disk access of the previous step 5 is executed, and if not, the rotation of the spindle is stopped (step 7).

[Problem to be solved by the invention]

The conventional disk drive system was configured as described above, so even when using the AC power section, the disk spindle rotates each time the disk is accessed, and the disk access is performed after a stabilization wait time, resulting in long access times and other problems. There was a problem.

This invention was made to solve the above-mentioned problems.
The purpose of this invention is to reduce disk access time by constantly rotating the disk spindle to eliminate stabilization waiting time when using the fll.

[Means to solve the problem]

The electronic device system according to the present invention includes an ACIC
The system determines whether the power source is on or off, and accesses the disk using a back-up flow that is appropriate for each case.

[Effect]

The disk system according to the present invention determines the ACC electric protection mode, uses an operation flow to shorten the time required for disk access when using AC power, and operates to reduce power consumption due to disk access when using DCW power. Make it flow.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. 1st
In the figure, step 1 is power up, step is AC
/DC power supply determination, step 3 determines whether or not there is a disk access request, step 4 starts spindle rotation of the disk drive, step 5 waits for stabilization of spindle rotation, step 6 executes disk access, step 7
Step 8 determines whether or not there is a next disk access request, and Step 8 stops the spindle rotation of the disk drive.

Next, the operation will be explained.

After turning on the power (step l), first the power source is AC!
In step 2, it is determined whether the source is a power source or a DC power source.

When using the ACW source, the disk spindle is rotated (snap 4), and after waiting for stable rotation (step 5), if there is a disk access request (step 3), the disk is accessed (step 6).

Note that the disk spindle is always kept rotating in preparation for disk access when the ACN source is turned on. When using the DCIE source, first, it is determined whether there is a disk access request (step 3), and if there is a disk access request, the disk spindle is rotated (step 4), and after waiting for rotation stabilization (step 5), the disk spindle is rotated (step 4). Access step 6 is performed, and if there is a next disk access request (step 7), the next disk access is performed. Furthermore, if there is no next disk, the rotation of the spindle is stopped (step 8) to prevent unnecessary power consumption.

〔Effect of the invention〕

As described above, according to the present invention, by constantly rotating the disk spindle when using AC power, there is no rotation stabilization wait time, and disk access can be performed more quickly. ! ? :+,'j When using the disk, the spindle is rotated to perform disk access as required, as in the past, which has the effect of reducing power consumption in disk access.

[Brief explanation of drawings]

FIG. 1 is a flow chart showing the operation of a disk system according to an embodiment of the present invention, and FIG. 2 is a flow chart showing the operation of a conventional disk system.

Claims (1)

[Claims] In electronic equipment systems that use both AC and DC power supplies, the disk spindle rotation control method depends on the type of power supply (AC/DC).
) An electronic device system characterized by switching.