Abstract: A signal conversion circuit including a voltage adjustment circuit and a control circuit is provided. An input terminal and an output terminal of the voltage adjustment circuit are respectively coupled to a power voltage and an output terminal of the signal conversion circuit. The control circuit provides a control signal to a control terminal of the voltage adjustment circuit, controls the control signal to change between a first control voltage level and a second control voltage level according to a signal level of an input data signal, or decides whether to provide a default voltage to the output terminal of the voltage adjustment circuit according to the input data signal.

Abstract: The present invention is to provide a connection device capable of increasing data reading and writing speeds, wherein the connection device includes a first connection module connected to a computer, a second connection module connected to at least one regular storage unit, a high-speed storage unit having higher data reading and writing speeds than each regular storage unit, and a control module respectively connected to the connection modules and the high-speed storage unit for identifying product information of each regular storage unit and the high-speed storage unit and generating a forward mapping table for each regular storage unit and a backward mapping table for the high-speed storage unit. Thus, when the computer performs a reading or writing operation on the regular storage unit, the control module can execute the operation through the high-speed storage unit according to the mapping tables, so as to shorten the time required for data processing.

Abstract: The present invention is to provide a system for increasing read and write speeds of a hybrid storage unit, which includes a cache controller connected to the hybrid storage unit and a computer respectively, and stores forward and backward mapping tables each including a plurality of fields. The hybrid storage unit is composed of at least one regular storage unit (e.g., an HDD) having a plurality of regular sections corresponding to forward fields respectively, and at least one high-speed storage unit (e.g., an SSD) having a plurality of high-speed storage sections corresponding to backward fields respectively with higher read and write speeds than the regular storage unit. The cache controller can make the high-speed storage section corresponding to each backward field correspond to the regular section corresponding to the forward field, thus allowing the computer to rapidly read and write data from and into the hybrid storage unit.

Abstract: The present invention is to provide a system for increasing read and write speeds of a hybrid storage unit, which includes a cache controller connected to the hybrid storage unit and a computer respectively, and stores forward and backward mapping tables each including a plurality of fields. The hybrid storage unit is composed of at least one regular storage unit (e.g., an HDD) having a plurality of regular sections corresponding to forward fields respectively, and at least one high-speed storage unit (e.g., an SSD) having a plurality of high-speed storage sections corresponding to backward fields respectively with higher read and write speeds than the regular storage unit. The cache controller can make the high-speed storage section corresponding to each backward field correspond to the regular section corresponding to the forward field, thus allowing the computer to rapidly read and write data from and into the hybrid storage unit.

Abstract: The present invention is to provide an access device connected to a computer, a hard disk drive and a memory disk respectively, wherein the hard disk drive has a normal region divided into a plurality of regular sections, the memory disk is divided into a plurality of mirroring sections, and the access device stores an index table comprising a plurality of fields each having a flag. The access device can execute the steps of receiving a read instruction from the computer; reading sequentially the fields corresponding to the read instruction; reading data stored in a mirroring section corresponding to a field thus read and sending the data to the computer when the flag in the field is a first value; and reading data stored in a regular section corresponding to the field and sending the data to the computer when the flag in the field is a second value.

Abstract: The present invention is to provide a method implemented to an information storage device comprising a storage unit and a secret chamber management unit, wherein the storage unit is connected with a computer device through the secret chamber management unit for allowing the computer device to obtain a storage capacity of the storage unit. The secret chamber management unit sets an access authority selectively over the entirety or a part of the storage unit and formats the storage unit according to a command and a password inputted by a user, so as to create at least one physical open storage area and at least one physical hidden storage area in the storage unit. In addition, an allocation management area is defined in the secret chamber management unit or the storage unit for storing management information related to the open storage area and the hidden storage area.

Abstract: The present invention provides a data security device and a data security method of storage media. The data security device comprises an interface decoder for receiving control instructions and data from a host computer. The interface decoder is connected to an encryption/decryption unit and a password check unit. When a user wants to access the security data region in the storage medium, the password check unit will check the inputted password. If the password is correct, the encryption/decryption unit is activated to encrypt the data to be secured into a ciphertext and decrypt the ciphertext into a plaintext. A storage data access control unit connected to the encryption/decryption unit and the storage medium is also provided to store the ciphertext and plaintext from the encryption/decryption unit into the storage medium and read the data in the storage medium into the decryption/decryption unit.