Shulou(Shulou.com)11/24 Report--

Thanks to CTOnews.com netizens Fatty Cat, X42, Edvin, Leibi, Yahu 667788 for the delivery of clues! CTOnews.com October 30 news, in last week's Xiaomi OS and Xiaomi 14 series of new products conference, Lei Jun announced the launch of a "UltraSpace storage expansion" function. For 256GB's Xiaomi 14 Pro, users can get extra 8GB space, while for 512GB's Xiaomi 14 and Xiaomi 14 Pro, users can get extra 16GB space.

Today, Zhang Guoquan, director of Xiaomi's mobile phone system software department, interpreted the function, saying that the "UltraSpace storage expansion" function will not pose a life risk to UFS at all, while the old model does not support upgrades.

In addition, Xiaomi has contributed the standard to the UFS Association. In order to respect the originality, Xiaomi requires chip manufacturers to do a little time protection period, which should be adapted by all major mobile phone manufacturers in the near future.

The complete content of CTOnews.com is as follows:

With regard to the storage expansion function mentioned in Xiaomi 14 press conference, I have read everyone's feedback over the past few days, and I feel that it is still necessary to talk about the context of this function. The text is very long. Students who are not interested in technology can only look at the questions and answer the first paragraph.

Why do you want to do this function?

It is a shame that a few years ago, MIUI has been accused of being "bloated". In the past two years, it has been vigorously rectified, from last year's razor plan to this year's storage expansion, so we should say goodbye to bloated completely.

Razor Plan 1.0 should uninstall all system applications except individual basic functions. Razor Plan 2.0 should minimize system firmware and increase storage capacity to ensure maximum usable space for users.

Ultra-compact Xiaomi surging OS, not only extremely light, but also can save a lot of space, coupled with the hardware expansion of 8GB, compared with competitors' flagships can get up to nearly 20GB space. In addition, the OS file deduplication and dynamic compression functions also improve storage efficiency, not only large, but also more "durable", comprehensive, long-term use full, you can store more than 30 or even 40G of data.

What is the technical principle? Is UFS at risk of longevity?

Not at all, we can rest assured to use, to believe in the professionalism of Xiaomi and chip manufacturers, and do not be rhythmic.

Simply popularize the bad block replacement management, because the memory device can only be replaced with the reserved space unit after the bad block is found, once there is not enough reserved space, the memory chip will be completely unusable. In addition to reserving sufficient space according to users' habits, we also optimize the management of Cache to reduce the occurrence of erasure and bad blocks, and at the same time support cloud control to adjust the reserved area of bad blocks according to users' conditions after long-term use to ensure the stability of the system. According to the current model of heavy users, under the condition of writing 40GB data every day, the expansion chip of 256GB can still be guaranteed for more than 10 years and 512GB for more than 20 years. Please rest assured.

In order to ensure the best storage experience, it is necessary to achieve deep collaboration between the host file system and UFS, which has been reflected in the FBO refurbished storage function before. with the same idea, Xiaomi is also involved in the resource management of UFS on the host side based on the depth of file management, realizing "unnecessary data writing (UFS)" through software, and "writing data not necessary and not migrating" through software + firmware. Reduce the amount of writing while achieving better wear-leveling and WAF

Can the old model be upgraded and supported?

Need mobile phone manufacturers, supply chain manufacturers to adapt, and to do calibration when the mobile phone production, so the old model does not support.

Why don't some versions support the same Xiaomi 14?

For the security of the supply chain, we have purchased a number of memory chips. Although Xiaomi has share all the technology to the supplier, some manufacturers have not had time to adapt. In fact, there are objections a few days before the listing. Finally, Mr. Lei decided: good technology should not be wasted. Just explain it clearly to everyone. 8G / 16G is regarded as enjoying the happiness brought by technology. No, it is normal. I hope you understand.

Driven by Xiaomi, mainstream memory chip manufacturers at home and abroad will adapt one after another.

Can other manufacturers use this technology?

Xiaomi has contributed the standard to the UFS Association. In order to respect the originality, we require chip manufacturers to do some time protection period. In the near future, all major mobile phone manufacturers should adapt to this function. Since its establishment, Xiaomi has been hoping to work with all manufacturers to promote the progress of the industry. There is no need to explain this, which should be obvious to all.

According to Lei Jun's previous introduction, a piece of mobile phone storage labeled 256GB actually has more real space than 275GB. Of these, 93.1% of the space is really available to users, and the remaining 6.9% is called Over Provision, referred to as OP, which is occupied by internal management of the memory. This part of the space can not be used in the use of mobile phones.

Xiaomi works closely with memory manufacturers. First, Xiaomi modified its space management strategy to reduce the space occupied by the OP area from 6.9 per cent to about 3 per cent. This process requires an in-depth understanding of how the memory works to ensure that the OP area space is compressed without affecting the performance and lifetime of the memory. After many tests and optimization, Xiaomi found an ideal balance.

Xiaomi then added a logical address mapping range to thepaper.cn 's OS file system, allowing it to manage this "new space". In the process, Xiaomi needs to deeply customize the file system to ensure that it can correctly and efficiently manage this new space. After countless experiments and tuning, Xiaomi engineers finally achieved this goal.

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