Data storage device with both bit patterned and continuous media
View Patent ↗Embodiments of a single data storage device with multiple different data recording media surfaces are disclosed. In one embodiment, at least one of the data recording media surfaces is conventional, such as a continuous or discrete track recording media. Another of the data recording media surfaces is a relatively high areal density, high data rate recording media, such as a bit patterned media (BPM) recording media.
1. A data storage system, comprising:
a first recording surface that is a bit patterned media surface comprising non-contiguous individual bits of a recording material;
a second recording surface that is a continuous media recording surface, a discrete track media recording surface or a combination of a continuous media portion and a discrete track media portion; and
a data read/write control component that manages data read/write operations relative to both of the first and second recording surfaces.
2. The data storage system of claim 1 , wherein the first recording surface is on a first disk and the second recording surface is on a second disk, the first disk being separate and distinct from the second disk.
3. The data storage system of claim 1 , wherein the second recording surface stores error information that maps defects relative to the bit patterned media surface.
4. The data storage system of claim 1 , wherein the data read/write control component causes a collection of data to be written to the second recording surface at a first data transfer rate, and subsequently causes the collection of data to be written to the first recording surface at a second data transfer rate, the second data transfer rate being different than the first data transfer rate.
5. The data storage system of claim 1 , wherein the data read/write control component controls a spindle motor so as to cause an adjustment to an alternate rotational velocity, and wherein the alternate rotational velocity is selected based at least in part upon a determination as to which one of the first and second recording surfaces data is to be written during the alternate rotation velocity.
6. The data storage system of claim 4 , wherein the second data transfer rate is greater than the first data transfer rate.
7. The data storage system of claim 1 , wherein the data read/write control component causes a collection of data to be written to the second recording surface, and subsequently causes a transfer of the data collection to the first recording surface.
8. A method of managing a data storage system, the method comprising:
writing, at a first data transfer rate, a collection of data to a first data recording surface that is a continuous media recording surface, a discrete track media recording surface or a combination of a continuous media portion and a discrete track media portion;
reading the collection of data from the first data recording surface;
writing, at a second data transfer rate, the collection of data to a second data recording surface that is a bit patterned data recording media comprising non-contiguous individual bits of a recording material; and
wherein the first data transfer rate is greater than the second data transfer rate.
9. The method of claim 8 , wherein writing the collection of data to the second data recording surface further comprises writing during a period of time identified as being likely to be when the data storage system is otherwise in low demand.
10. The method of claim 8 , wherein reading the collection of data from the first data recording surface occurs during a period of time identified as being likely to be when the data storage system is otherwise in low demand.
11. A data storage device comprising a read/write control component that causes data to be transferred from a continuous or discrete track recording surface to a bit patterned recording surface, comprising non-contiguous individual bits of a recording material, during a period of time determined to be likely to be when the data storage device is otherwise in low demand.
12. The data storage device of claim 11 , wherein the data read/write control component subsequently causes the data from the bit patterned recording surface to be read at a rate that is more rapid than a rate at which the read/write system wrote the data to the bit patterned recording surface.
13. The data storage device of claim 11 , wherein the data storage device includes a collection of error information related to defects in the bit patterned recording surface, and wherein the collection of error information is recorded, within the data storage device, on a media recording surface that may be the same or different than the continuous or discrete track recording surface from which the read/write control component transferred said data to the bit patterned media recording surface.
14. The data storage device of claim 13 , wherein the read/write control component accesses and reviews the collection of error information so as to determine where on the bit patterned recording surface the data from the continuous or discrete track recording should not be transferred.
15. The data storage device of claim 11 , wherein the continuous or discrete track recording surface is on a first disk and the bit patterned media recording surface is on a second disk, the first disk being separate and distinct from the second disk.
16. The data storage device of claim 15 , wherein the data read/write control component adjusts a rotational velocity at which the second disk is rotated such that the data read from the bit patterned recording surface is read at a rate that is different than it was written to the bit patterned recording surface.
17. The data storage device of claim 11 , wherein the data storage device further comprises a solid state memory with which the read/write control component is also configured to conduct data read/write operations.
18. A data storage system, comprising:
at least one recording surface having:
a first recording surface portion, within the data storage system, that is a bit patterned media surface comprising non-contiguous individual bits of a recording material that enable storage of data at a first areal density;
a second recording surface portion that is a continuous media portion, a discrete track media portion or a combination of a continuous media portion and a discrete track media portion, the first recording surface portion and the second recording surface portion being within the same data storage system, the second recording surface portion configured to store data at a second areal density that is different from the first areal density; and
a common data read/write control component, within the same data storage system, configured to manage data read/write operations on both of the first and second recording surface portions at the respective first and second areal densities.
19. The system of claim 18 , wherein the second recording surface portion stores a map of defects in the bit patterned media surface.
20. The system of claim 18 , wherein the at least one recording surface comprises a first disk surface that includes the first recording surface portion and a second disk surface that includes the second recording surface portion and wherein the data storage system is a single disk drive that comprises the first disk surface, the second disk surface and the common data read/write control component.
21. The system of claim 18 and wherein storage of data on the first recording surface portion and on the second recording surface portion is carried out using perpendicular recording.