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."

 

Community Search:
MacTech Search:

Software Updates via MacUpdate

Google Drive 1.20 - File backup and shar...
Google Drive is a place where you can create, share, collaborate, and keep all of your stuff. Whether you're working with a friend on a joint research project, planning a wedding with your fiancé, or... Read more
Simon 4.0.3 - Monitor changes and crashe...
Simon monitors websites and alerts you of crashes and changes. Select pages to monitor, choose your alert options, and customize your settings. Simon does the rest. Keep a watchful eye on your... Read more
Vitamin-R 2.23 - Personal productivity t...
Vitamin-R creates the optimal conditions for your brain to work at its best by structuring your work into short bursts of distraction-free, highly focused activity alternating with opportunities for... Read more
iDefrag 5.0.0 - Disk defragmentation and...
iDefrag helps defragment and optimize your disk for improved performance. Features include: Supports HFS and HFS+ (Mac OS Extended). Supports case sensitive and journaled filesystems. Supports... Read more
PCalc 4.2 - Full-featured scientific cal...
PCalc is a full-featured, scriptable scientific calculator with support for hexadecimal, octal, and binary calculations, as well as an RPN mode, programmable functions, and an extensive set of unit... Read more
FileZilla 3.10.2 - Fast and reliable FTP...
FileZilla (ported from Windows) is a fast and reliable FTP client and server with lots of useful features and an intuitive interface. Version 3.10.2: Note: Now requires a 64-bit Intel processor.... Read more
The Hit List 1.1.11 - Advanced reminder...
The Hit List manages the daily chaos of your modern life. It's easy to learn - it's as easy as making lists. And it's powerful enough to let you plan, then forget, then act when the time is right.... Read more
Bartender 1.2.32 - Organize your menu ba...
Bartender lets you organize your menu bar apps. Features: Lets you tidy your menu bar apps how you want. See your menu bar apps when you want. Hide the apps you need to run, but do not need to... Read more
ClamXav 2.7.5 - Free virus checker, base...
ClamXav is a free virus checker for OS X. It uses the tried, tested, and very popular ClamAV open source antivirus engine as a back end. I hope you like and use ClamXav a lot and that it helps keep... Read more
xScope 4.1.2 - Onscreen graphic measurem...
xScope is powerful set of tools that are ideal for measuring, inspecting, and testing on-screen graphics and layouts. Its tools float above your desktop windows and can be accessed via a toolbar,... Read more

Dungeon Hunter 5 Coming on March 12
Gameloft has excitedly announced that Dungeon Hunter 5 is on its way! Once again, you will adventure across the land of Valenthia exploring dungeons and fighting monsters. The game will have a new asynchronous multiplayer mode called Strongholds... | Read more »
It Came From Canada: Jurojin: Immortal N...
At this point it’s pretty safe to say that no MOBA is going to dethrone Dota 2 and League of Legends anytime soon. After all, if Batman can’t do it, nobody can. However, with a genre as popular and profitable as this one, there’s still room for... | Read more »
Tiny Farm – Animals, Tractors and Advent...
Tiny Farm – Animals, Tractors and Adventures! Review By Amy Solomon on March 3rd, 2015 Our Rating: :: LIVELY LANDSCAPESUniversal App - Designed for iPhone and iPad Tiny Farm – Animals, Tractors and Adventures! includes farm-related... | Read more »
This Week at 148Apps: February 23-27, 20...
Final February Fun at 148Apps   How do you know what apps are worth your time and money? Just look to the review team at 148Apps. We sort through the chaos and find the apps you’re looking for. The ones we love become Editor’s Choice, standing out... | Read more »
GDC 2015 – Does Not Commute is Definitel...
GDC 2015 – Does Not Commute is Definitely a Game You Should Keep an Eye on Posted by Rob Rich on March 2nd, 2015 [ permalink ] We were teased about Mediocre Games’ (Smash Hit, | Read more »
F84 Games & POW! Announce Stan Lee V...
F84 Games has announced that it is working with legendary comic creator Stan Lee and POW! Entertainment to produce Stan Lee’s Hero Command. The game will be a action adventure of heroic proportions. | Read more »
Setlyst Keeps Your Set Straight So You C...
Setlyst Keeps Your Set Straight So You Can Focus On Rocking Out. Posted by Jessica Fisher on March 2nd, 2015 [ permalink ] Universal App - Designed for iPhone and iPad | Read more »
Space is Vast, So Space Agency Has a Vas...
Space is Vast, So Space Agency Has a Vast New Update! Posted by Jessica Fisher on March 2nd, 2015 [ permalink ] Universal App - Designed for iPhone and iPad | Read more »
Size DOES Matter Review
Size DOES Matter Review By Campbell Bird on March 2nd, 2015 Our Rating: :: HARD TO BEATUniversal App - Designed for iPhone and iPad This rhythm game has a unique control scheme and performance system that make it feel like a true... | Read more »
The first ever action 3D card battler Al...
On the other hand, you probably haven’t played an action 3D card battler – until now. Step forward, All Star Legion. All Star Legion is a 3D QTE-based action RPG card battler, but fear not – the game itself isn’t as convoluted as its description.... | Read more »

Price Scanner via MacPrices.net

Another Tranche Of IBM MobileFirst For iOS Ap...
IBM has announced the next expansion phase for  its IBM MobileFirst for iOS portfolio, with a troika of new apps to address key priorities for the Banking and Financial Services, Airline and Retail... Read more
Sale! 15-inch Retina MacBook Pros for up to $...
B&H Photo has the new 2014 15″ Retina MacBook Pros on sale for up to $250 off MSRP for a limited time. Shipping is free, and B&H charges NY sales tax only: - 15″ 2.2GHz Retina MacBook Pro: $... Read more
WaterField Designs Introduces the Minimalist...
With Apple Pay gaining popularity, Android Pay coming in May 2015, and loyalty cards and receipts that can be accessed from smartphones, San Francisco’s WaterField Designs observes that it may be... Read more
Sale! 15-inch 2.2GHz Retina MacBook Pro for $...
 Best Buy has the 15″ 2.2GHz Retina MacBook Pro on sale for $1774.99 $1799.99, or $225 off MSRP. Choose free home shipping or free local store pickup (if available). Price valid for online orders... Read more
13-inch 2.5GHz MacBook Pro (refurbished) avai...
The Apple Store has Apple Certified Refurbished 13″ 2.5GHz MacBook Pros available for $170 off the cost of new models. Apple’s one-year warranty is standard, and shipping is free: - 13″ 2.5GHz... Read more
13-inch 2.5GHz MacBook Pro on sale for $100 o...
B&H Photo has the 13″ 2.5GHz MacBook Pro on sale for $999.99 including free shipping plus NY sales tax only. Their price is $100 off MSRP. Read more
27-inch 3.5GHz 5K iMac in stock today and on...
 B&H Photo has the 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 for... Read more
Apple Launches Free Web-Based Pages and Other...
Apple’s new Web-only access to iWork productivity apps is a free level of iCloud service available to anyone, including people who don’t own or use Apple devices. The service includes access to Apple... Read more
Survey Reveals Solid State Disk (SSD) Technol...
In a recent SSD technology use survey, Kroll Ontrack, a firm specializing in data recovery, found that while nearly 90 percent of respondents leverage the performance and reliability benefits of SSD... Read more
Save up to $600 with Apple refurbished Mac Pr...
The Apple Store is offering Apple Certified Refurbished Mac Pros for up to $600 off the cost of new models. An Apple one-year warranty is included with each Mac Pro, and shipping is free. The... Read more

Jobs Board

*Apple* Solutions Consultant - Retail Sales...
**Job Summary** As an Apple Solutions Consultant (ASC) you are the link between our customers and our products. Your role is to drive the Apple business in a retail Read more
*Apple* Pay Automation Engineer - iOS System...
**Job Summary** At Apple , great ideas have a way of becoming great products, services, and customer experiences very quickly. Bring passion and dedication to your job Read more
Sr. Technical Services Consultant, *Apple*...
**Job Summary** Apple Professional Services (APS) has an opening for a senior technical position that contributes to Apple 's efforts for strategic and transactional Read more
Event Director, *Apple* Retail Marketing -...
…This senior level position is responsible for leading and imagining the Apple Retail Team's global engagement strategy and team. Delivering an overarching brand Read more
*Apple* Pay - Site Reliability Engineer - Ap...
**Job Summary** Imagine what you could do here. At Apple , great ideas have a way of becoming great products, services, and customer experiences very quickly. Bring Read more
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.