JPS61115124A - Control method of fixed disk device - Google Patents

Abstract

PURPOSE:To prevent data of a fixed disk device from being destructed by reading an storing a control parameter in a fixed disk controller and referring to the stored control parameter so as to transfer data when the request of data transfer occurs. CONSTITUTION:When data transfer is requested with respect to the fixed disk device 3a specified by a host computer 1 through the fixed disk device controller 2, it reads out the control parameter of the inherent fixed disk device, which is stored in a memory means held in the interior of the fixed disk device 3a, and stores the parameter its control table. In the actual data transfer, by referring to the control table, data is transferred to the fixed disk device 3a specified according to the control parameter stored on the table. Where the data transfer is requested with respect to the fixed disk device 3b, data is transferred in the same manner. A system can be operated in such a way, and therefore the erroneous action of the system due to an erroneous operation and data destruction of the fixed disk device can be prevented.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention relates to a method for controlling a fixed disk device when a plurality of fixed disk devices of different types are controlled via a fixed disk control device. .

[Conventional technology]

In general, fixed disk devices have different types of cylinders (search areas), number of heads, seek (search) time, write current switching cylinder, etc.

These are collectively called "control parameters").

Conventionally, there was a system shown in Figure 1 that used fixed disk devices of different types in combination with a host computer.
2) is the fixed disk control device connected to the host computer (1), (,7a) is the fixed disk device connected to the fixed disk control device (2), (,71)) is the fixed disk device it(, 7a) is a different type of fixed disk device. Furthermore, (da) is a data bus between the host computer (/l) and the fixed disk system 611 device (2).

(j) is a data bus 6 (6) between the fixed disk control device (2) and the fixed disk devices (3a) and (Jb), which is used by the host computer (1) to control parameters specific to the fixed disk device. The flow of control parameters when given to the device (2) is shown.

Next, the operation will be explained. When starting up the system, the system program installed in the host computer (/l) installs the fixed disk device (3a) connected to the fixed disk controller t(2) as part of the initial settings of the system. and (3b), the fixed disk controller (
2) to a control table (not shown) included in the control table.

When setting this control parameter, the operator must recognize the type of fixed disk device (3a) or (3b) connected to the system, and
Alternatively, select control parameters that match (3b) and input them to the host computer (/l), or input them to each fixed disk device (3b).
The operator selects a system program suitable for the fixed disk device (3a) or (3b) connected to the system from a group of system programs that include the control parameters to be set in a) or (3b). Then, by running the system program on the host computer (1), the above control parameters are set in each fixed disk control device (3b).

The above control parameter setting operation is completed, and the host computer (/l and fixed disk device i (,7a) or (3b)
), the fixed disk controller (2) refers to the control parameters set in the internal table (not shown) to transfer data between the fixed disk controller (2) and the fixed disk controller (2). Disk device (Ja) or (
Jb) recognizes the type of data and transfers data in a format and under conditions suitable for that type.

[Problem that the invention seeks to solve]

As mentioned above, in the conventional fixed disk device control method, the operator knows the type of fixed disk device connected to the fixed disk control device before starting up the system, and the appropriate discrimination parameter is used. It is necessary to set the fixed disk device to the device, which makes the operation complicated, and if you specify the wrong type of fixed disk device, the system may not operate correctly or the data on the fixed disk device may be destroyed. There were some problems.

The present invention has been made to solve these problems, and an object of the present invention is to provide a method for controlling a fixed disk device that eliminates the need for setting parameters unique to fixed disk devices. It is.

[Means for solving problems]

In order to achieve the above object, in a method for controlling a fixed disk device according to the present invention, control parameters specific to the fixed disk device are held within the fixed disk device, and the control parameters are set to the fixed disk device before data transfer. When a data transfer request occurs, data is transferred between the specified fixed disk device and the host computer by referring to the control parameters stored in the fixed disk control device. The above problems are solved in this way.

[For production]

By adopting such technical measures.

Unique control parameters for each fixed disk device are sent from the fixed disk device to the host computer via the fixed disk controller, and control for each fixed disk is switched.

[Example] FIG. 1 is based on this invention. This is an explanatory diagram for explaining the method of controlling fixed disk devices in a computer system.
2) shows the flow of fixed disk device-specific parameters that the fixed disk system @device (2) reads from the fixed disk device (3a) or (3b).Next, the operation will be explained. When a data transfer request is made from the host computer (1) to the specified fixed disk device (3a) via the fixed disk controller (-),
The fixed disk side tilting device (-) is a storage means (not shown) (such as a non-volatile ROM or the storage medium itself of the fixed disk device (3a)) held inside the designated fixed disk device (3a). ) to read out the fixed disk device-specific control parameters stored in the fixed disk? 111 m is stored in a control table (not shown) inside the device t(2).

Next, when performing actual data transfer, the fixed disk device (3a) is selected according to the control parameters stored in the table by referring to the control table.
Perform data transmission with.

Similarly, when there is a data transfer request to the fixed disk device (3b), the fixed disk device f (
3b) Stored in internal storage means.

The device-specific control parameters are read out, and data transfer with the fixed disk device 1 (3b) is performed according to the control parameters.

Note that the control parameters include control information (for example, the name and version name of the fixed disk control device) other than parameters specific to the fixed disk device (number of cylinders, number of heads, 5-seating time, basting current switching cylinder, etc.). It can be done.

Furthermore, the number of fixed disk devices connected to the fixed disk control device does not have to be two as shown in the embodiment; any number of fixed disk devices can be connected, and any type of fixed disk devices may be combined and connected in a mixed manner. Furthermore, the timing for reading the parameters from the fixed disk device may not be performed every time there is a data transfer request from the host, but only at the time of the first transfer request after the power is turned on.

〔Effect of the invention〕

As described above, operators and system users can operate the system without being aware of the type of fixed disk device, thereby preventing malfunction of the system or data destruction of the fixed disk device due to erroneous operation. Additionally, system program providers can create one type of system program instead of creating a system program for each fixed disk device.
Since it is only necessary to provide the information, reliability, operability, and productivity are improved.

[Brief explanation of the drawing]

@1 Figure 1 is an explanatory diagram 5th λ for explaining the method of disabling a fixed disk device in a 6 computer system according to the present invention.
The figure is an explanatory diagram for explaining a method of controlling a fixed disk device in a conventional computer system. (1) is a total of X hosts, and (2) is a fixed disk controller. (3a) and (3b) are fixed disk installations! , (?l indicates the flow of parameters specific to fixed disk devices). In addition, in FIG. 1, the same reference numerals indicate the same or equivalent parts. Figure 1 7: Figure 2 of IL collection of 1,000 tons of marammeter

Claims (1)

[Scope of Claims] A method for controlling a plurality of fixed disk devices that transfer data to and from a host computer via a fixed disk control device, wherein each of the fixed disk devices includes a control device specific to the fixed disk device. Parameters are stored in advance, and when a request for data transfer occurs, the control parameters stored in the fixed disk device are read out and imported into the fixed disk control device to control the fixed disk device thereafter. A method for controlling a fixed disk device, characterized in that the method is carried out in accordance with the control parameters stored in the fixed disk control device. (2) The method for controlling a fixed disk device according to claim 1, wherein the control parameters are stored in the storage medium itself of the fixed disk device. (3) The control parameters are stored in a ROM included in the fixed disk device.
A method for controlling a fixed disk device described in Section 1.