Access control method and apparatus for a raid storage device
AssigneeDynapac GmbH
InventorJack Chang
Life of this patent
Estimating the term…
Abstract
An access control method and apparatus for a RAID storage device that includes a data hard disk and a backup hard disk are disclosed herein. In response to a write command, data associated with the write command is written onto the data hard disk and the backup hard disk concurrently. Moreover, in response to a read command, data corresponding to the read command is read from the data hard disk, and the data read from the data hard disk is written concurrently onto the backup hard disk.
Claims14
An access control method for a RAID storage device that includes a data hard disk and a backup hard disk, comprising the steps of:
- a) in response to a write command, writing data associated with the write command onto the data hard disk and the backup hard disk concurrently;
- and
- b) in response to a read command, reading data corresponding to the read command from the data hard disk, and concurrently writing the data read from the data hard disk onto the backup hard disk.
An access control apparatus for a RAID storage device in a host system, the RAID storage device including a data hard disk and a backup hard disk, said access control apparatus being responsive to write and read commands issued by a processor in the host system and comprising:
- a controller;
- a first transmission device adapted to connect said controller to the processor and the data hard disk;
- and
- a second transmission device adapted to connect said controller and the backup hard disk;
- said controller being capable of receiving the write and read commands issued by the processor through said first transmission device;
- in response to the write command, said controller being configured to write data associated with the write command onto the data hard disk and the backup hard disk concurrently through said first and second transmission devices;
- in response to the read command, said controller being configured to read data corresponding to the read command from the data hard disk through said first transmission device, and to write concurrently the data read from the data hard disk onto the backup hard disk through said second transmission device.
An access control apparatus for a RAID storage device in a host system, the RAID storage device including a data hard disk and a backup hard disk, said access control apparatus being responsive to write and read commands issued by a processor in the host system and comprising:
- a controller;
- a transmission device connected to said controller, adapted to be connected to the data hard disk, and adapted to establish a virtual channel with the processor;
- and
- a storage interface adapted to connect said controller and the backup hard disk;
- said controller being capable of receiving the write and read commands issued by the processor through said transmission device;
- in response to the write command, said controller being configured to write data associated with the write command onto the data hard disk and the backup hard disk concurrently through the virtual channel and said storage interface;
- in response to the read command, said controller being configured to read data corresponding to the read command from the data hard disk through the virtual channel, and to write concurrently the data read from the data hard disk onto the backup hard disk through said storage interface.
Dependencies are inferred from the claim text.