Method and apparatus for exchanging data with a hard disk

A method for reading data in a hard disk, the method comprising:

• calculating a minimum offset address of a data package in the hard disk according to a compression scheme, wherein the data package includes a portion or all of the data;
• reading an identifier of the data package according to the minimum offset address;
• determining if the identifier of the data package corresponding to an identification of the data;
• if the determining operation is not confirmed, reading an identification of a next data package according to a sequence, and continuing the determining operation is confirmed;
• and
• if the determining operation is confirmed, reading the data package.

A data storage method for a hard disk, the hard disk provided with a parameter storage block for storing a last physical address accessed, the method comprising:

• allocating a storage block for storing a plurality of status parameters;
• segmenting data into a plurality of segments, each corresponding to a predefined time period;
• compressing each of the segments into a data package, wherein the data package includes a header having a compression time and compression information of how the data package is compressed;
• reading a first physical address according to the status parameters;
• storing the compressed segments into continuous storage spaces with reference to the first physical address till all compressed segments are stored;
• and
• resetting the first physical address to a second physical address.