High reliability storage drive and data write method

2:

• A storage drive comprising:
• a storage medium;
• a head for reading data from, and writing data in, said storage medium;
• a load/unload mechanism which loads and unloads said head on said storage medium;
• a non-volatile memory which stores data corresponding to a write command issued from a host;
• and
• a controller which writes data corresponding to said write command to said non-volatile memory in response to satisfaction of a first predetermined condition to maintain an unload state of said head;
• wherein data stored in said non-volatile memory are written in said storage medium in response to satisfaction of a second predetermined condition;
• and
• wherein said second predetermined condition is when a read command is received from said host to reproduce information from said storage medium.

4:

• A data write method comprising the steps of:
• receiving a write command from a host;
• judging whether a head is in a load state or in an unload state;
• and
• when judging said head is in the load state, writing data corresponding to said write command into a storage medium, and when judging said head is in the unload state, temporally writing said data in a non-volatile memory to thereby maintain the unload state of said head.

5:

• A data write method comprising the steps of:
• receiving a write command from a host;
• judging whether a head is in a load state or in an unload state;
• writing data corresponding to said write command from said host into a non-volatile memory in response to satisfaction of a first predetermined condition to thereby maintain the unload state of said head;
• and
• writing said data stored in said non-volatile memory into a storage medium in response to satisfaction of a second predetermined condition.

8:

• A storage drive comprising:
• a storage medium;
• a head for reading data from, and writing data onto, said storage medium;
• a load/unload mechanism which loads and unloads said head on said storage medium;
• a non-volatile memory which stores data corresponding to a write command issued from a host;
• and
• a controller which, in response to said write command, controls to write data corresponding to said write command in said non-volatile memory and controls to thereby maintain an unload state of said head when said head is in the unload state, and controls to transfer said data written in said non-volatile memory into said storage medium when the storage drive satisfies a predetermined condition.

10:

• A storage drive comprising:
• a storage medium;
• a head for reading data from, and writing data in, said storage medium;
• a load/unload mechanism which loads and unloads said head on said storage medium;
• a non-volatile memory which stores data corresponding to a write command issued from a host;
• and
• a controller which, in response to said write command, controls to write data corresponding to said write command in said non-volatile memory to thereby maintain an unload state of said head, when said head is in the unload state, and a remaining capacity of said non-volatile memory is sufficient to store said data corresponding to said write command.