Patent ID: 11899968
Assignee: TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATION
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 6:
7. A method of controlling a magnetic disk apparatus, the method comprising:
receiving a request of read from outside; and
when data requested to be subjected to the read is first data of an update target stored in a first band among plural bands serving as a storage area, each band being possessed by a magnetic disk and to be subjected to write of data by a Shingled Magnetic Recording method, reading the first data from the first band, storing the first data in the buffer memory, updating the first data in the buffer memory, transmitting the first data in the buffer memory to the outside, and writing the first data in the buffer memory to one of the plural bands
wherein
the buffer memory is provided with a first buffer area and a second buffer area; and
the method further comprises
copying the first data read from the first band to acquire two pieces of the first data, storing third data serving as one of the two pieces of the first data in the first buffer area, storing fourth data serving as another one of the two pieces of the first data in the second buffer area, transmitting the third data in the first buffer area to the outside, and writing the fourth data in the second buffer area to one band among the plural bands.