News Column

Patent Issued for System, Method and Apparatus for Storage Architecture for Bit Patterned Media Using Both Erase Band and Shingled Magnetic Recording

August 5, 2014



By a News Reporter-Staff News Editor at Information Technology Newsweekly -- HGST Netherlands B.V. (Amsterdam, NL) has been issued patent number 8786985, according to news reporting originating out of Alexandria, Virginia, by VerticalNews editors.

The patent's inventors are Grobis, Michael K. (San Jose, CA); Richter, Hans J. (Palo Alto, CA).

This patent was filed on April 1, 2013 and was published online on July 22, 2014.

From the background information supplied by the inventors, news correspondents obtained the following quote: "This invention generally relates to hard disk drives and, in particular to an improved system, method and apparatus for storage architecture for bit patterned media using both erase band and shingled magnetic recording.

"Organizing and storing physical data on bit patterned media (BPM) is a promising candidate for magnetic data storage that exceeds 1 Tb/in.sup.2. Due to fabrication constraints, high density BPM will most likely employ data cells that have a bit aspect ratio (BAR) of 1 to 2. Low BARs pose a challenge to head design, which favors high BAR. Heads that have the necessary write fields and write field gradients to write data to BPM with high fidelity tend to write multiple tracks simultaneously. These types of heads, however, erase any data than might have been stored on an adjacent track. The BAR mismatch problem can be solved by using shingled magnetic recording (SMR). SMR, however, adds complexity and delays to the recording process. A data storage architecture that reduces the loss in performance associated with SMR would be desirable."

Supplementing the background information on this patent, VerticalNews reporters also obtained the inventors' summary information for this patent: "Embodiments of a system, method and apparatus for storage architecture for bit patterned media using both erase band and shingled magnetic recording are disclosed. A hard disk drive may comprise a disk having bit patterned media with a plurality of data tracks arrayed in architecture pages having at least one of erase band mode (EBM), shingled mode (SM) and unallocated space. An actuator has a head for writing data to the data tracks of the bit patterned media. A control system monitors, reallocates and reconfigures the architecture pages from EBM, SM or unallocated space to a different one of EBM, SM or unallocated space to enhance performance of the hard disk drive.

"In other embodiments, a method of partitioning data tracks on a disk of bit patterned media in a hard disk drive comprises providing the disk with pages having a storage architecture of at least one of erase band mode (EBM), shingled mode (SM) and empty space; counting an amount of empty space and a number of EBM pages; assessing if the amount of empty space is above a selected threshold and, if so, assessing if any SM pages can be converted to EBM pages; converting SM pages to EBM pages; updating a status of converted pages and mapping between a user data location and a physical data location before returning to the counting step; determining if the number of EBM pages is sufficient to allow consolidation if the amount of empty space is not above the selected threshold; consolidating SM pages and returning to the updating step; consolidating the EBM pages into SM pages if the number of EBM pages is sufficient to allow consolidation; and returning to the updating step.

"In another embodiment, a method of partitioning data tracks on a disk of bit patterned media in a hard disk drive comprises organizing the disk into pages of adjacent data tracks spanning one or more sectors; partitioning the pages into storage architectures comprising erase band mode (EBM), shingled mode (SM) and empty space; monitoring whether the pages are being written to in EBM, SM, or are empty pages; changing the storage architecture of at least one page based on how much empty space remains in said at least one page; converting EBM pages to SM pages when a storage threshold is exceeded; and transferring valid user data from EBM pages to SM pages or to empty pages that have been converted to SM pages.

"The foregoing and other objects and advantages of these embodiments will be apparent to those of ordinary skill in the art in view of the following detailed description, taken in conjunction with the appended claims and the accompanying drawings."

For the URL and additional information on this patent, see: Grobis, Michael K.; Richter, Hans J.. System, Method and Apparatus for Storage Architecture for Bit Patterned Media Using Both Erase Band and Shingled Magnetic Recording. U.S. Patent Number 8786985, filed April 1, 2013, and published online on July 22, 2014. Patent URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=8786985.PN.&OS=PN/8786985RS=PN/8786985

Keywords for this news article include: HGST Netherlands B.V., Information Technology, Information and Data Storage.

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


For more stories covering the world of technology, please see HispanicBusiness' Tech Channel



Source: Information Technology Newsweekly


Story Tools






HispanicBusiness.com Facebook Linkedin Twitter RSS Feed Email Alerts & Newsletters