Apple patent emphasis is on solid-state memory
TweetFollow Us on Twitter

Apple patent emphasis is on solid-state memory

Could future Apple TVs have DVD functions? A new Apple patent at the US Patent & Trademark Office hints that this could be the case, noting that "this technology could be aimed at a digital video recorder." At the very least the patent shows that the long term future for all of Apple's devices involves solid-state memory.

Patent number 20100268866 is for systems and methods for operating a disk drive. System and methods for storing data to a storage device are provided. In embodiments, the storage device may include a disk drive with a solid-state memory for storing certain frequently updated information. In some embodiments, the solid-state memory may be used to store journaling information. The inventor is Thomas R. Colligan.

Here's Apple's background and summary of the invention: "Hard disk drives continue to be one of the most widely used electronic storage mediums. Typically, a hard drive stores electronic data by storing a series of magnetic polarity transitions in circular tracks along the surface a magnetic disk. As disk drive technology has advanced, the amount of data that may be stored on a disk has greatly increased, in part, by increasing the density of the tracks. With increased track density, however, the risk of data corruption through adjacent track interference, often referred to as ATI, and wide area adjacent track erasure, often referred to as ATE, also increases.

"Adjacent track interference occurs during write operations when the fringing magnetic field of the head weakens the magnetic polarity transitions on tracks adjacent to the track being written. Over time, after successive write operations to a particular track, the data stored on the adjacent tracks may weaken to the point of becoming unreadable, resulting in corruption of the file and loss of data. Wide area adjacent track erasure poses a similar problem.

"In a typical perpendicular recording design, a soft underlayer is used in the media as part of the flux return path to enhance the write field, and a shield is added next to the write pole in the write head to increase the write field gradient. Unfortunately, the shield leads to an additional flux path, and the write coil induces flux through this additional path during writing, often resulting in adjacent track erasure. Given the large footprint of these shields, the erasure can occur over a fairly wide span, thus rendering the term wide area adjacent track erasure.

"Accordingly, modern disk drives often include correction algorithms designed to reduce the effects of ATI and ATE by periodically refreshing data before the data becomes unreadable. The refreshing process may involve reading particular tracks and re-writing the data in those tracks. These correction algorithms, however, may tend to reduce the performance of the hard drive by reducing the hard drive's availability while the correction algorithms execute.

"To increase the efficiency of data correction algorithms, the algorithms may tend to target tracks that are in high traffic areas, i.e., areas of the disk that have experienced more write operations and, therefore, potentially higher levels of ATI and/or ATE. For example, the disk drive may keep a record of the number of write operations that each track has experienced, and when a particular track has experienced a threshold number of writes, the data correction algorithm may then be executed to refresh the adjacent tracks. It will be appreciated, therefore, that high traffic areas of the disk will tend to cause the initiation of data correction algorithms more frequently.

"One area of the disk that may experience particularly high traffic is the journaling area of the disk, which is used by the operating system's journaling file system. A journaling file system is used to reduce the likelihood of file corruption in the event of a system crash during the writing of file data to the disk drive. In a journaling file system, changes are written to or logged into a journal, which is usually contained in a reserved space on the hard drive, before the changes are committed to the main file system.

"A journaling file system maintains a journal of the changes it intends to make ahead of time, so that after crash the recovery simply involves replaying changes from the journal until the file system is consistent. To increase the average speed of file storage, the space on the disk drive that is reserved for the journal is usually toward the outer circumference of the disk, where the data processing speed is faster. This process provides the advantage that, in the event of a system crash during a file update, at least one uncorrupted version of the file will exist.

"Due to the fact that the journal is written during every write operation to the disk, the journal will usually be a very high traffic area. As a high traffic area, the journal may tend to experience more ATI and/or ATE, and as a result, the data correction algorithms may tend to be initiated more often for the journal area compared to other areas of the disk.

"Certain disclosed embodiments provide a disk drive with a solid state memory, such as a flash memory, wherein the flash memory may be used to store frequently updated information, such as a database or journaling information. Storing the frequently updated information to the flash memory rather than to the disk may result in more efficient use of the disk drive. For example, storing the journaling information to the flash memory instead of the disk may eliminate a particularly high traffic area from the disk, resulting in fewer executions of the correction algorithms, which would otherwise consume disk drive resources. For another example, moving the journal off the disk drive frees up more space on the disk drive for regular file storage.

"Additionally, the disk space made available by the absence of the journal may include the higher speed memory at the outer tracks of the disk. In some embodiments, the journal may be stored to both the flash memory and the disk drive. In this way, the reliability of the drive may be improved by providing a second redundant journal. In this embodiment, the redundant journal may be saved toward the center of the disk, thus reserving the higher speed outer tracks for regular file storage. Furthermore, information stored in the solid state memory, e.g., the flash memory, may be moved to the disk in response to a sleep event and returned to the flash memory in response to a wake event."

 
AAPL
$116.47
Apple Inc.
+0.16
MSFT
$47.98
Microsoft Corpora
-0.72
GOOG
$537.50
Google Inc.
+2.67

MacTech Search:
Community Search:

Software Updates via MacUpdate

Cobook 3.0.7 - Intelligent address book....
Cobook Contacts is an intuitive, engaging address book. Solve the problem of contact management with Cobook Contacts and its simple interface and powerful syncing and integration possibilities.... Read more
StatsBar 1.9 - Monitor system processes...
StatsBar gives you a comprehensive and detailed analysis of the following areas of your Mac: CPU usage Memory usage Disk usage Network and bandwidth usage Battery power and health (MacBooks only)... Read more
Cyberduck 4.6 - FTP and SFTP browser. (F...
Cyberduck is a robust FTP/FTP-TLS/SFTP browser for the Mac whose lack of visual clutter and cleverly intuitive features make it easy to use. Support for external editors and system technologies such... Read more
Maya 2015 - Professional 3D modeling and...
Maya is an award-winning software and powerful, integrated 3D modeling, animation, visual effects, and rendering solution. Because Maya is based on an open architecture, all your work can be scripted... Read more
Evernote 6.0.1 - Create searchable notes...
Evernote allows you to easily capture information in any environment using whatever device or platform you find most convenient, and makes this information accessible and searchable at anytime, from... Read more
calibre 2.11 - Complete e-library manage...
Calibre is a complete e-book library manager. Organize your collection, convert your books to multiple formats, and sync with all of your devices. Let Calibre be your multi-tasking digital... Read more
Herald 5.0.1 - Notification plugin for M...
Note: Versions 2.1.3 (for OS X 10.7), 3.0.6 (for OS X 10.8), and 4.0.8 (for OS X 10.9) are no longer supported by the developer. Herald is a notification plugin for Mail.app, Apple's Mac OS X email... Read more
Firetask 3.7 - Innovative task managemen...
Firetask uniquely combines the advantages of classical priority-and-due-date-based task management with GTD. Stay focused and on top of your commitments - Firetask's "Today" view shows all relevant... Read more
TechTool Pro 7.0.6 - Hard drive and syst...
TechTool Pro is now 7, and this is the most advanced version of the acclaimed Macintosh troubleshooting utility created in its 20-year history. Micromat has redeveloped TechTool Pro 7 to be fully 64... Read more
PhotoDesk 3.0.1 - Instagram client for p...
PhotoDesk lets you view, like, comment, and download Instagram pictures/videos! (NO Uploads! / Image Posting! Instagram forbids that! AND you *need* an *existing* Instagram account). But you can do... Read more

Latest Forum Discussions

See All

Ubisoft Gives Everyone Two New Ways to E...
Ubisoft Gives Everyone Two New Ways to Earn In-Game Stuff for Far Cry 4 Posted by Jessica Fisher on November 21st, 2014 [ permalink ] | Read more »
Golfinity – Tips, Tricks, Strategies, an...
Dig this: Would you like to know what we thought of being an infinite golfer? Check out our Golfinity review! Golfinity offers unlimited ways to test your skills at golf. Here are a few ways to make sure your score doesn’t get too high and your... | Read more »
Dark Hearts, The Sequel to Haunting Meli...
Dark Hearts, The Sequel to Haunting Melissa, is Available Now Posted by Jessica Fisher on November 21st, 2014 [ permalink ] Universal App - Designed for iPhone and iPad | Read more »
Meowza! Toyze Brings Talking Tom to Life...
Meowza! | Read more »
Square Enix Announces New Tactical RPG f...
Square Enix Announces New Tactical RPG for Mobile, Heavenstrike Rivals. Posted by Jessica Fisher on November 21st, 2014 [ permalink ] With their epic stories and gorgeous graphics, | Read more »
Quest for Revenge (Games)
Quest for Revenge 1.0.0 Device: iOS Universal Category: Games Price: $4.99, Version: 1.0.0 (iTunes) Description: The great Kingdom of the west has fallen. The gods ignore the prayers of the desperate. A dark warlord has extinguished... | Read more »
Threadz is a New Writing Adventure for Y...
Threadz is a New Writing Adventure for You and Your Friends Posted by Jessica Fisher on November 21st, 2014 [ permalink ] In the tradition of round-robin storytelling, | Read more »
SteelSeries Stratus XL Hardware Review
Made by: SteelSeries Price: $59.99 Hardware/iOS Integration Rating: 4 out of 5 stars Usability Rating: 4.5 out of 5 stars Reuse Value Rating: 4.25 out of 5 stars Build Quality Rating: 4.5 out of 5 stars Overall Rating: 4.31 out of 5 stars | Read more »
ACDSee (Photography)
ACDSee 1.0.0 Device: iOS iPhone Category: Photography Price: $1.99, Version: 1.0.0 (iTunes) Description: Capture, perfect, and share your photos with ACDSee. The ACDSee iPhone app combines an innovative camera, a powerful photo... | Read more »
ProTube for YouTube (Entertainment)
ProTube for YouTube 2.0.2 Device: iOS Universal Category: Entertainment Price: $1.99, Version: 2.0.2 (iTunes) Description: ProTube is the ultimate, fully featured YouTube app. With it's highly polished design, ProTube offers ad-free... | Read more »

Price Scanner via MacPrices.net

15″ 2.2GHz Retina MacBook Pro on sale for $17...
 B&H Photo has the 2014 15″ 2.2GHz Retina MacBook Pro on sale today for $1749. Shipping is free, and B&H charges NY sales tax only. B&H will also include free copies of Parallels Desktop... Read more
27-inch 3.5GHz 5K iMac in stock today and on...
 B&H Photo has the new 27″ 3.5GHz 5K iMac in stock today and on sale for $2299 including free shipping plus NY sales tax only. Their price is $200 off MSRP, and it’s the lowest price available... Read more
21-inch 1.4GHz iMac on sale for $979, save $1...
B&H Photo has the new 21″ 1.4GHz iMac on sale for $979.99 including free shipping plus NY sales tax only. Their price is $120 off MSRP. B&H will also include free copies of Parallels Desktop... Read more
13-inch 1.4GHz/256GB MacBook Air on sale for...
B&H Photo has lowered their price on the 13″ 1.4GHz/256GB MacBook Air to $1059.99 including free shipping plus NY sales tax only. Their price is $140 off MSRP, and it’s the lowest price for this... Read more
Save up to $400 with Apple refurbished 2014 1...
The Apple Store has restocked Apple Certified Refurbished 2014 15″ Retina MacBook Pros for up to $400 off the cost of new models. An Apple one-year warranty is included with each model, and shipping... Read more
New 13-inch 1.4GHz MacBook Air on sale for $8...
 Adorama has the 2014 13″ 1.4GHz/128GB MacBook Air on sale for $899.99 including free shipping plus NY & NJ tax only. Their price is $100 off MSRP. B&H Photo has the 13″ 1.4GHz/128GB MacBook... Read more
Apple Expected to Reverse Nine-Month Tablet S...
Apple and Samsung combined accounted for 62 percent of the nearly 36 million branded tablets shipped in 3Q 2014, according to early vendor shipment share estimates from market intelligence firm ABI... Read more
Stratos: 30 Percent of US Smartphone Owners t...
Stratos, Inc., creator of the Bluetooth Connected Card Platform, has announced results from its 2014 Holiday Mobile Payments Survey. The consumer survey found that nearly one out of three (30 percent... Read more
2014 1.4GHz Mac mini on sale for $449, save $...
 B&H Photo has lowered their price on the new 1.4GHz Mac mini to $449.99 including free shipping plus NY tax only. Their price is $50 off MSRP, and it’s the lowest price available for this new... Read more
Check Apple prices on any device with the iTr...
MacPrices is proud to offer readers a free iOS app (iPhones, iPads, & iPod touch) and Android app (Google Play and Amazon App Store) called iTracx, which allows you to glance at today’s lowest... Read more

Jobs Board

*Apple* Solutions Consultant (ASC) - Apple (...
**Job Summary** The ASC is an Apple employee who serves as an Apple brand ambassador and influencer in a Reseller's store. The ASC's role is to grow Apple Read more
*Apple* Solutions Consultant (ASC)- Retail S...
**Job Summary** The ASC is an Apple employee who serves as an Apple brand ambassador and influencer in a Reseller's store. The ASC's role is to grow Apple Read more
Project Manager, *Apple* Financial Services...
**Job Summary** Apple Financial Services (AFS) offers consumers, businesses and educational institutions ways to finance Apple purchases. We work with national and Read more
*Apple* Store Leader Program - College Gradu...
Job Description: Job Summary As an Apple Store Leader Program agent, you can continue your education as you major in the art of leadership at the Apple Store. You'll Read more
*Apple* Retail - Multiple Positions (US) - A...
Sales Specialist - Retail Customer Service and Sales Transform Apple Store visitors into loyal Apple customers. When customers enter the store, you're also the Read more
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.