Magnetic disk device and write method
AssigneesKabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
InventorsTakao Aoki, Ryuta Kumagai
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Abstract
According to one embodiment, a magnetic disk device configured to record data in a shingled-recording manner, wherein the device performs sequential write in a shingled-recording area on a magnetic disk such that data to be written in a write target track and data located in a one-forward track of the write target track are received on a volatile memory and then write with respect to the write target track is performed, and upon occurrence of an unexpected power cut, the device stores data unwritten in the shingled-recording area out of the data received on the volatile memory in a nonvolatile memory.
Claims12
A magnetic disk device configured to record data in a shingled-recording manner, wherein
- the device performs sequential write in a shingled-recording area on a magnetic disk such that data to be written in a write target track and data to be located in a track that is one track forward the write target track are stored in a volatile memory and then write with respect to the write target track is performed, and
- upon occurrence of an unexpected power cut, the device stores unwritten data, which is data that have not been written in the shingled-recording area out of data stored in the volatile memory, into a nonvolatile memory.
A data write method of a magnetic disk device configured to record data in a shingled-recording manner, the method comprising:
- performing sequential write with respect to a shingled-recording area on the magnetic disk such that data to be written in a write target track and data to be located in a track that is one track forward the write target track are stored in a volatile memory, and then the write with respect to the write target track is performed;
- and
- storing unwritten data, which is data that have not been written in the shingled-recording area out of data stored in the volatile memory, into a nonvolatile memory upon occurrence of an unexpected power cut.
A magnetic disk device configured to record data in a shingled-recording manner, wherein
- the device performs sequential write in a shingled-recording area on a magnetic disk such that data to be written in a write target track and data to be located in a track that is one track forward the write target track are stored in a volatile memory and then write with respect to the write target track is performed,
- upon occurrence of an unexpected power cut, the device stores unwritten data, which is data that have not been written in the shingled-recording area out of data stored in the volatile memory, into a nonvolatile memory, and
- if write is started from a head of a write area of the shingled-recording, the write is performed with a track skew of the write target track which is the same as that of a forward track.
A magnetic disk device configured to record data in a shingled-recording manner, wherein
- the device performs sequential write in a shingled-recording area on a magnetic disk such that data to be written in a write target track and data to be located in a track that is one track forward the write target track are stored in a volatile memory and then write with respect to the write target track is performed,
- upon occurrence of an unexpected power cut, the device stores unwritten data, which is data that have not been written in the shingled-recording area out of data stored in the volatile memory, into a nonvolatile memory, and
- if data of a plurality of forward tracks are erased when performing write with respect to the write target track in the shingled-recording area, all data of the forward tracks are received on the volatile memory and then, the write to the write target track is performed.
Dependencies are inferred from the claim text.