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wanglinadminMar 22 2017
Before before updating to a new version of the iOS, will you backup all the data and file in the device to the cloud? With the advent of latest new iOS version 10.3, you may have to be so. In this new version, Apple will introduce a new File System -- Apple File System, and replace the HFS + which current used by iOS.
HFS + and APFS
HFS + from 1998 to now, has been in use for nearly 20 years, and in order to keep up with the modern computer operation instruction, HFS + also constantly updated in the past time.
From then on, HFS + just runs through a series of apple devices. It has experienced kilobytes, megabytes to gigabytes and terabytes. We also experienced from the hard disk drives to SSDS, from physical installation to digital downloads, from manual backup to the Time Machine and the process of icloud. Along the way, HFS + and his team have been keeping its vitality, but as time goes on, if you want to move forward a step, you always need something new to break it down.
HFS + now runs on all apple device, but in different Device its execution also different, including some of the key areas, such as encryption. This means that different source code and separate maintenance and development. Whether now or in the future, APFS extensions can let apple platform more consistently, it allows a single codebase using fewer resources to develop and maintain, and make it develop faster and better.
Apple started the development of APFS from 2014,this is not a development based on the existing file system, but from the beginning to the end to build the new system independently. On June 14, 2016, Apple released new File System on WWDC2016 - Apple File System, namely the APFS.
APFS is that it is designed for advanced solid-state drives and flash memory file system optimization, based on the characteristics of a unique writing while copying, the device I/O (input/output interface) merger, in order to maximize storage performance, at the same time to ensure the data reliability.
APFS support sharing space, allowing more physical volumes on the hard disk or flash memory Shared underlying space available, rather than have A fixed amount of space, for example: the capacity of 100 gb hard drive, A and B plate for 10 gb capacity, the space available for 70 gb.
Security and privacy is the design basis APFS. Encryption is one of the characteristics of APFS native support, users can choose any of the following for each roll of encryption methods: not encrypted, using a secret key encryption, or more key encryption (for each file using the private key encryption, at the same time, in view of the sensitive metadata using a single key). Many encryption ensures that even if the Device physical security threatened, still can guarantee the integrity of the user data. Depending on the hardware, APFS encrypted using AES - reduced or AES - CBC algorithm.
The developer's attitude
Your iOS system will automatically convert to the new file format, it is not compatible with the old format. Because this is the new version of the installation process, if what is wrong with your device, you store files on the device may be dangerous.
IOS currently the latest version of the iOS 10.2.1, the next major update to iOS 10.3. Since February Apple release of iOS 10.3 test version, is published to the fifth beta, official version is expected to be released at the end of this month.
From the point of the current situation, most developers prefer to the new file system. Compared with previous HFS + file system, the new file system allows them to have more space to play in the application management, its stronger encryption performance, management of large amounts of data is more convenient, perfected in the timestamp, saved a space, avoid file collapse and so on, the overall benefits a lot.
But the new file system also has bad side, developers say iOS 10.3 will automatically change all the data on the device into a APFS, which will change the format of the data storage. Although the data is still there, but the format and is not the same as before.Therefore in the process of transfer Device to the new format, if something went wrong, even if you have to backup files, just in a version of the file transfer is useless, because the new iOS system can't read the old format file. So if something went wrong, or loss of data, application developers is probably can't help.
The user instructions
Eventually, of course, all apple devices will use APFS as the new file system, apple will provide a simple and fast way to help users to update and file transfer. But if you want the APFS switch back to the HFS +, apple said there was no way. So in the file system after upgrading to APFS, if you want to return to what is wrong with the old version of the iOS, then you need to reformat, restore the old file system, all the files on the Device in the process, you will be removed.
If you have a full backup of course, this is not a big problem. If your device change brick, but lazy that you don't have a backup, that is a tragedy.
Users should receive apple's backup before installing the iOS 10.3 reminder, and a lot of people may turn a blind eye, or think apple is redundant, oneself also used in the absence of backup is updated, there is no need. Please don't like this!
To point out is that apple is working very hard to avoid mistakes. For loss of data that sort of thing, apple an engineer said: "that kind of feeling as if, I lost a photo, and that happens to be me keep the only a photo about grandma." So even if the update problems, it affected range should be less.
As stated above, the iOS 10.3 is a major update, in addition to the introduction of new apple file system, also added to find my AirPods. In addition, iOS 10.3 has improved the application of animation, set up the new Apple ID configuration files, more clear up storage usage, SiriKit improvement and new options up to analysis.
Finally once again remind all the users, must conduct a full backup before update to the iOS 10.3.If you need any iphone parts for your screen repair you can try : ogodeal.com
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