JPH06110786A - Magneto-optical disk boot cache system - Google Patents

Abstract

PURPOSE:To shorten the rising time of a terminal loading from a magneto- optical disk. CONSTITUTION:A nonvolatile memory is provided for IOP 1 to make EEROM 3 to store an access sequence to the magneto-optical disk 5 after rising a power source. When an IOP system becomes operable after the rising, data is read out of the magneto-optical disk 5 along the contents of EEROM 3 and stored in a local memory 2 as optical cache data so as to previously prepare data for a read-out instruction from CPU 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magneto-optical disk boot cache system, and more particularly to a device for storing a terminal boot program on a magneto-optical disk.

[0002]

2. Description of the Related Art Conventionally, when a terminal finishes internal initialization, it reads a boot program of a magneto-optical disk,
The program is started from that information.

[0003]

In the above-mentioned conventional example,
There is a problem that it takes too long for the terminal to become operable after the power is turned on. The cause of this problem is that it takes time to read from the magneto-optical disk.

[0004]

A magneto-optical disk boot cache system according to the present invention has a memory for storing disk access and track / sector information at power-on. It is characterized in that access is performed from the magneto-optical disk before the command is issued.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings.

FIG. 1 is a system diagram of an embodiment of the present invention. The IOP1 is a processor that controls I / O such as magneto-optical disk control, and the LM2 is used as a work memory of the IOP1 and a disk cache memory that temporarily stores data of the magneto-optical disk 5. That is, the data read from and written to the magneto-optical disk 5 is pooled in the LM 2 via the magneto-optical disk controller 4. When there is a read command from the CPU 6 to the magneto-optical disk 5, the IOP 1 passes the data of LM2 to the CPU 6 without reading from the magneto-optical disk 5 when the data corresponding to the read command from the CPU 6 is in LM2.

The EEPROM 3 stores a read command to the magneto-optical disk 5 from the CPU 6 when the power is turned on. IOP1 becomes C when it becomes operable after the power is turned on.
The read command from the PU 6 is stored in the EEPROM 3 without waiting for the read command from the CPU 6 after the previous power-on, and is read from the magneto-optical disk 5 and stored in the LM 2 via the magneto-optical disk controller 4. C
When a read command is received from the PU 6, it is checked whether the content exists in the LM 2, and if they match, the content of the LM 2 is passed to the CPU 6. If they do not match, the data is read from the magneto-optical disk 5 and passed to the CPU 6.

As described above, originally, in the magneto-optical disk cache system, there is no data read from the memory of the magneto-optical disk cache, that is, the magneto-optical disk 5 and the write data from the CPU 6, when the power is turned on. In the embodiment, when the CPU was started up last time,
The data of the magneto-optical disk 5 according to the read sequence received from 6 is prepared in the LM 2 as magneto-optical disk cache data.

If the data stored in the EEPROM 3 has a different instruction sequence from the CPU 6 after the power is turned on, the rewriting is awaited.

Since the EEPROM 3 is non-volatile and stores the contents of the memory even when the power is turned off, the magneto-optical disk 5 is always accessed according to the previous instruction received from the CPU 6 when the power is turned on next time. Do.

[0011]

As described above, according to the present invention,
IOP while CPU is performing initialization processing
The storage address of the data to be read at the time of startup from the optical disk or the magneto-optical disk is stored in the EEROM,
It is possible to shorten the startup time of the terminal by pre-reading from the magneto-optical disk from the contents of.

The magneto-optical disk startup sequence for terminal startup is likely to be the same for each startup. Unless the startup program is changed, the terminal startup time will be shortened because it is the same.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention.

[Explanation of symbols]

 1 IOP 2 LM 3 EEROM 4 Magneto-optical disk controller 5 Magneto-optical disk 6 CPU 7 MM

Claims (1)

[Claims] 1. A memory for storing disk access and track / sector information from the time of power-on,
A magneto-optical disk boot cache system characterized by making access from the magneto-optical disk before power-on command is issued when power is turned on.