Storage system with snapshot-backup capability and method for the same

A storage system with a snapshot-backup capability electrically coupled to a main system, comprising:

• a storage controlling unit for receiving and processing commands and data from the main system, disposed in an interface card;
• and
• a storage device electrically coupled to an I/O port formed on the interface card, consisting of at least a first data block and a second data block in response to the first data block wherein
• upon receiving at least a newly stored data transmitted from the main system, the storage controlling unit determines whether there is any difference found between the newly stored data and at least a previously stored data located in the first data block thereby backing up each difference previously stored data from the first data block to the second data block, and then storing the corresponding different newly stored data through the I/O port to the first data block where the different previously stored data is located as long as there is any one different data found between the newly and previously stored data.

A storage system with a snapshot-backup capability electrically coupled to a motherboard having a main system, comprising:

• a storage controlling unit for receiving and processing at least a newly stored data transmitted from the main system, disposed in the motherboard;
• and
• a storage device electrically coupled to a system bus formed on the motherboard, consisting of at least a first data block and a second data block in response to the first data block wherein
• upon receiving the newly stored data from the main system, the storage controlling unit determines whether there is any difference found between the newly stored data and at least a previously stored data located in the first data block thereby backing up each different previously stored data from the first data block to the second data block, and then storing the corresponding different newly stored data through the system bus of the motherboard to the first data block where said different previously stored data is located as long as there is any one different data found between the newly and previously stored data.

A storage method for facilitating a snapshot-backup capability within a storage system, the storage system having a storage device, the storage device having multiple primary data blocks and multiple backup data blocks, the method comprising:

• receiving at least a newly stored data transmitted from a main system;
• comparing the newly stored data with at least a previously stored data located on the data blocks, which is corresponding to the newly stored data by the storage system;
• and
• backing up each different previously stored data from the primary data block to the backup data block, and then storing the corresponding different newly stored data to the primary data block where the different previously stored data is located as long as there is any one different data found between the newly and the previously stored data.