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

Bookends 12.8 - Reference management and...
Bookends is a full-featured bibliography/reference and information-management system for students and professionals. Bookends uses the cloud to sync reference libraries on all the Macs you use.... Read more
Apple iTunes 12.6 - Play Apple Music and...
Apple iTunes lets you organize and stream Apple Music, download and watch video and listen to Podcasts. It can automatically download new music, app, and book purchases across all your devices and... Read more
Default Folder X 5.1.4 - Enhances Open a...
Default Folder X attaches a toolbar to the right side of the Open and Save dialogs in any OS X-native application. The toolbar gives you fast access to various folders and commands. You just click on... Read more
Amazon Chime 4.1.5587 - Amazon-based com...
Amazon Chime is a communications service that transforms online meetings with a secure, easy-to-use application that you can trust. Amazon Chime works seamlessly across your devices so that you can... Read more
CrossOver 16.2 - Run Windows apps on you...
CrossOver can get your Windows productivity applications and PC games up and running on your Mac quickly and easily. CrossOver runs the Windows software that you need on Mac at home, in the office,... Read more
Adobe Creative Cloud 4.0.0.185 - Access...
Adobe Creative Cloud costs $19.99/month for a single app, or $49.99/month for the entire suite. Introducing Adobe Creative Cloud desktop applications, including Adobe Photoshop CC and Illustrator CC... Read more
MegaSeg 6.0.2 - Professional DJ and radi...
MegaSeg is a complete solution for pro audio/video DJ mixing, radio automation, and music scheduling with rock-solid performance and an easy-to-use design. Mix with visual waveforms and Magic... Read more
Bookends 12.8 - Reference management and...
Bookends is a full-featured bibliography/reference and information-management system for students and professionals. Bookends uses the cloud to sync reference libraries on all the Macs you use.... Read more
Adobe Creative Cloud 4.0.0.185 - Access...
Adobe Creative Cloud costs $19.99/month for a single app, or $49.99/month for the entire suite. Introducing Adobe Creative Cloud desktop applications, including Adobe Photoshop CC and Illustrator CC... Read more
Default Folder X 5.1.4 - Enhances Open a...
Default Folder X attaches a toolbar to the right side of the Open and Save dialogs in any OS X-native application. The toolbar gives you fast access to various folders and commands. You just click on... Read more

The best deals on the App Store this wee...
Deals, deals, deals. We're all about a good bargain here on 148Apps, and luckily this was another fine week in App Store discounts. There's a big board game sale happening right now, and a few fine indies are still discounted through the weekend.... | Read more »
The best new games we played this week
It's been quite the week, but now that all of that business is out of the way, it's time to hunker down with some of the excellent games that were released over the past few days. There's a fair few to help you relax in your down time or if you're... | Read more »
Orphan Black: The Game (Games)
Orphan Black: The Game 1.0 Device: iOS Universal Category: Games Price: $4.99, Version: 1.0 (iTunes) Description: Dive into a dark and twisted puzzle-adventure that retells the pivotal events of Orphan Black. | Read more »
The Elder Scrolls: Legends is now availa...
| Read more »
Ticket to Earth beginner's guide: H...
Robot Circus launched Ticket to Earth as part of the App Store's indie games event last week. If you're not quite digging the space operatics Mass Effect: Andromeda is serving up, you'll be pleased to know that there's a surprising alternative on... | Read more »
Leap to victory in Nexx Studios new plat...
You’re always a hop, skip, and a jump away from a fiery death in Temple Jump, a new platformer-cum-endless runner from Nexx Studio. It’s out now on both iOS and Android if you’re an adventurer seeking treasure in a crumbling, pixel-laden temple. | Read more »
Failbetter Games details changes coming...
Sunless Sea, Failbetter Games' dark and gloomy sea explorer, sets sail for the iPad tomorrow. Ahead of the game's launch, Failbetter took to Twitter to discuss what will be different in the mobile version of the game. Many of the changes make... | Read more »
Splish, splash! The Pokémon GO Water Fes...
Niantic is back with a new festival for dedicated Pokémon GO collectors. The Water Festival officially kicks off today at 1 P.M. PDT and runs through March 29. Magikarp, Squirtle, Totodile, and their assorted evolved forms will be appearing at... | Read more »
Death Road to Canada (Games)
Death Road to Canada 1.0 Device: iOS Universal Category: Games Price: $7.99, Version: 1.0 (iTunes) Description: Get it now at the low launch price! Price will go up a dollar every major update. Update news at the bottom of this... | Read more »
Bean's Quest Beginner's Guide:...
Bean's Quest is a new take on both the classic platformer and the endless runner, and it's free on the App Store for the time being. Instead of running constantly, you can't stop jumping. That adds a surprising new level of challenge to the game... | Read more »

Price Scanner via MacPrices.net

2.6GHz Mac mini on sale for $559, $140 off MS...
Guitar Center has the 2.6GHz Mac mini (MGEN2LL/A) on sale for $559 including free shipping. Their price is $140 off MSRP, and it’s the lowest price available for this model. Read more
SSD Speeder RAM Disk SSD Life Extender App Fo...
Fehraltorf, Switzerland based B-Eng has announced they are making their SSD Speeder app for macOS publicly available for purchase on their website. SSD Speeder is a RAM disk utility that prevents... Read more
iPhone Scores Highest Overall in Smartphone D...
Customer satisfaction is much higher among smartphone owners who use their device to operate other connected home services such as smart thermostats and smart appliances, according to the J.D. Power... Read more
Swipe CRM Free Photo-Centric CRM Sales DEal C...
Swipe CRM LLC has introduced Swipe CRM: Visual Sales 1.0 for iPad, an app for creating, managing, and sharing visually stunning sales deals. Swipe CRM is targeted to small-and-medium creative... Read more
13-inch 2.0GHz Apple MacBook Pros on sale for...
B&H has the non-Touch Bar 13″ 2.0GHz MacBook Pros in stock today and on sale for $150 off MSRP. Shipping is free, and B&H charges NY sales tax only: - 13″ 2.0GHz MacBook Pro Space Gray (... Read more
15-inch Touch Bar MacBook Pros on sale for up...
B&H Photo has the new 2016 15″ Apple Touch Bar MacBook Pros in stock today and on sale for up to $150 off MSRP. Shipping is free, and B&H charges NY sales tax only: - 15″ 2.7GHz Touch Bar... Read more
Apple’s iPhone 6s Tops Best-Selling Smartphon...
In terms of shipments, the iPhone 6s from Apple bested all competitors for sales in 2016, according to new analysis from IHS Markit, a world leader in critical information, analytics and solutions.... Read more
Logitech Rugged Combo Protective iPad Case an...
Logitech has announced its Logitech Rugged Combo, Logitech Rugged Case, and Logitech Add-on Keyboard for Rugged Case for Apple’s new, more affordable $329 9.7-inch iPad, a complete solution designed... Read more
T-Mobile To Offer iPhone 7 and iPhone 7 Plus...
T-Mobile has announced it will offer iPhone 7 and iPhone 7 Plus (PRODUCT)RED Special Edition in a vibrant red aluminum finish. The introduction of this special edition iPhone celebrates Apple’s 10... Read more
9-inch 128GB iPad Pros on sale for $50-$70 of...
B&H Photo has 9.7″ 128GB Apple WiFi iPad Pros on sale for up to $70 off MSRP, each including free shipping. B&H charges sales tax in NY only: - 9″ Space Gray 128GB WiFi iPad Pro: $649 $50... Read more

Jobs Board

*Apple* Retail - Multiple Positions- Chicago...
SalesSpecialist - Retail Customer Service and SalesTransform Apple Store visitors into loyal Apple customers. When customers enter the store, you're also the Read more
Fulltime aan de slag als shopmanager in een h...
Ben jij helemaal gek van Apple -producten en vind je het helemaal super om fulltime shopmanager te zijn in een jonge en hippe elektronicazaak? Wil jij werken in Read more
Starte Dein Karriere-Abenteuer in den Hauptst...
…mehrsprachigen Teams betreust Du Kunden von bekannten globale Marken wie Apple , Mercedes, Facebook, Expedia, und vielen anderen! Funktion Du wolltest schon Read more
*Apple* macOS Systems Integration Administra...
…most exceptional support available in the industry. SCI is seeking an Junior Apple macOS systems integration administrator that will be responsible for providing Read more
*Apple* Retail - Multiple Positions - Apple,...
Job Description: Sales Specialist - Retail Customer Service and Sales Transform Apple Store visitors into loyal Apple customers. When customers enter the store, Read more
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.