Disk storage apparatus and method for shingled magnetic recording
AssigneeKabushiki Kaisha Toshiba
InventorsTatsuya HAGA, Hideaki TANAKA
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Abstract
According to one embodiment, a disk storage apparatus includes a storage device, a writing controller, and a controller. The storage device includes a nonvolatile cache area in which a part of consecutive data is temporarily stored. The writing controller is configured to write the consecutive data in a recording area on a disk by an SMR method, the recording area being different from the cache area. The controller is configured to write the part of the data to the cache area, to invalidate data corresponding to logical addresses of the part of the data and recorded in the recording area on the disk, and to set a recording area with the invalidated data recorded therein to be an update recording area in which new data is recordable.
Claims20
A disk storage apparatus comprising:
- a storage device comprising a nonvolatile cache area in which a part of consecutive data is temporarily stored;
- a writing controller configured to write the consecutive data in a recording area on a disk by a shingled write magnetic recording (SMR) method, the recording area being different from the cache area;
- and
- a controller configured to write the part of the data to the cache area, to invalidate data corresponding to logical addresses of the part of the data and recorded in the recording area on the disk, and to set a recording area with the invalidated data recorded therein to be an update recording area in which new data is recordable.
A method of data writing which is applied to a disk storage apparatus comprising a storage device comprising a nonvolatile cache area in which a part of consecutive data is temporarily stored, and a writing controller configured to write the consecutive data in a recording area on a disk by a shingled write magnetic recording (SMR) method, the recording area being different from the cache area, the method comprising:
- writing the part of the data to the cache area;
- invalidating data corresponding to logical addresses of the part of the data and recorded in the recording area on the disk;
- and
- setting a recording area with the invalidated data recorded therein to be an update recording area in which new data is recordable.
Dependencies are inferred from the claim text.