What is the write amplification technology of SSDWrite amplification[Win11 Solutions]
19 2021-08-23 14:10
Basic SSD operation method
Write amplification (WA) is an attribute associated between flash why wont my computer make a recovery usb memory and solid state drives, because flash memory must be deleted before rewriting (we also call why would windows 10 recovery usb creation fail "programming"). When performing these operations, move (or rewrite) user data And metadata more than will creating a recovery drive on usb delete.everything once.These multiple operations not only increase the amount of written data and reduce the service life will deleting recovery partition mess up hard drive of the SSD, but also eat up the bandwidth of the flash memory (indirectly affects the random write will dell recovery usb ask for windows key performance).Many factors will affect the write amplification of SSD, let me explain in a little bit will recovered data stay on my hard drive more detail below.
As early as 2008, Intel and Silicon Systems (acquired by Western Digital in 20 will recovering windows wipe my internal hard drive 09) first proposed write amplification and used this term in public manuscripts.Their statement at will recovery disc work on new hard drive the time was that the write algorithm can't be lower than 1, but this statement was broken by SandForce will windows 10 recovery usb restore to factory in 2009, and SandForce said that their write amplification is 0.5.
Due to the operating will windows recovery delete files off of usb characteristics of flash memory, data can't be directly overwritten like in ordinary mechanical hard drives.When win 10 usb boot drive recover errors out data is written to the SSD for the first time, since all the particles in the SSD are in the win 7 recovery cannot see external hard drive erased state, the data can be written directly in the smallest unit of the page (usually 4K, refer to win10 usb flash recovery cannot get system files the particle data), and the master on the SSD The controller uses a logical and physical mapping window 10 password recovery usb pirate bay torrent system to manage the flash memory.(Logic we generally refer to LBA, while physical refers to FTL).When windows 10 64 bit edition usb recovery medi a new data needs to be replaced when new data is written, the SSD main controller will write the new windows 10 create recovery usb for another computer data to another blank flash memory space (erased state) and then update the logical LBA address to windows 10 create recovery usb for another pc point to the new Physical FTL address.The old address content becomes invalid data, but if you want windows 10 does not detect recovery media usb to write on it again, you need to erase the invalid data first.(Flash memory operation characteristics, windows 10 hard drive fail system recovery fail the smallest unit of writing is a page, and the smallest unit of erasing is a block, generally 12 windows 10 hard drive locked error during recovery 8~256 pages)
Then there is a problem. Flash memory has a limit on the number of times of programming windows 10 home 32 bit iso recovery usb and erasing, so that each program/erase cycle is called 1 P/E (program/erase cycles) cycle. Everyone windows 10 home recovery usb work for pro should know that MLC is usually 5000~ times. , And SLC is about 100,000 times (check flash memory windows 10 how to create a recovery usb data).In other words, the lower the write amplification, the fewer P/E cycles and the longer the windows 10 make a recovery disk on usb flash memory life.
Write magnification calculation
In 2008, Intel and SiliconSystems (acquired by windows 10 make install usb or recovery usb Western Digital in 2009) first proposed write amplification and used this term in public manuscripts.All windows 10 make recovery usb for another machine SSDs have a write amplification value, this value is not fixed, depending on whether the data windows 10 move recovery partition to flash usb written by the SSD is random or continuous?What is the amount of writing?The master did those operations, windows 10 no option to recover from usb etc.
The formula for calculating write amplification is roughly as follows:
For a single windows 10 not booting recovery usb not working operation, the simplest example, for example, if I want to write a 4KB data, the worst case is that windows 10 password recovery boot usb for free there is no clean space in a block, but invalid data can be erased, so the master will remove all The windows 10 password recovery tool usb free download data is read out, the block is erased, and the 4KB of new data is written back. The write amplification windows 10 pro os recovery 64 bit usb caused by this operation is: I actually wrote 4K of data, resulting in a write operation of the windows 10 pro wksta os recovery 64bit usb entire block (512KB), which is 128 Magnification.At the same time, the operation that originally windows 10 recover deleted files from usb drive only needed to write 4KB was changed to read (512KB), erase (512KB), and rewrite (512KB), which caused windows 10 recovering deleted files on a usb a great increase in delay and slow speed.
Factors affecting write amplification
Many factors windows 10 recovery disk download 64 bit usb affect SSD write amplification.Below I list the main factors and how they affect write amplification.
windows 10 recovery disk on external hard drive 1. Garbage Collection (GC) Garbage collection --- Although write amplification is increased, the windows 10 recovery does not see usb drive speed is improved.
This special algorithm is used to organize, move, merge, delete flash memory windows 10 recovery drive usb 2 or 3 blocks to improve efficiency.
2. Reserved space (OP) Over-provisioning --- Reduce write amplification, windows 10 recovery dual boot multiple hard drives good.(The larger the reserved space, the lower the write amplification)
Part of the space on the windows 10 recovery files from second hard drive flash memory of the SSD is reserved for the main control to optimize, and the user can't operate the windows 10 recovery hard drive recovery command prompt space.
3. After TRIM is turned on, write amplification can be reduced, good.
An ATA command, windows 10 recovery iso usb for another pc sent by the operating system to the SSD master, tells the master what data is invalid and does not windows 10 recovery on usb copy to disk need to be garbage collected.
4. Available capacity is reduced, write amplification, good.(The larger windows 10 recovery other computer iso download usb the available space, the lower the write amplification)
The space that is not used by the user windows 10 recovery tools bootable rescue disk usb needs to be supported by Trim, otherwise it will not affect the write amplification.
5. Secure Erase windows 10 recovery usb blue screen with cursor to reduce write amplification, good
Clear all user data and related metadata, and reset the SSD windows 10 recovery usb boots to black screen to its initial performance.
6. Separating Static and Dynamic Data to reduce write amplification, windows 10 recovery usb download for another pc good
Group frequently rewritten and infrequently rewritten data.
7. Continue to write Sequential windows 10 recovery usb drive kills usb driver writes to reduce write amplification, good
Theoretically speaking, the write amplification of windows 10 recovery usb drive upgrade license key continuous write is 1, but some factors still affect this value.
8. Random writes Random writes to windows 10 recovery usb error 0x80042405 increase write amplification, not good
Random write will write many non-contiguous LBAs, which will windows 10 recovery usb error during system restor greatly improve write amplification.
9. Wear Leveling (WL) Wear Leveling directly increases write windows 10 recovery usb for another pc microsoft amplification, not good
A mechanism to ensure that each block of flash memory is written to the same windows 10 recovery usb from a different computer number of times.
Once all blocks of the SSD have been windows 10 recovery usb not including system files written once, the SSD main controller will initialize those blocks that contain invalid data.(Stale windows 10 recovery usb not loading site answers.microsoft.com data, the data in these blocks has been replaced by updated data, is no longer invalid, and no LBA windows 10 recovery usb not seeing usb drive address), now they are waiting to be deleted so that new data can be written into them, how to windows 10 recovery usb restore to previous date optimize and organize these waiting to be Delete invalid data, this algorithm is called garbage collection windows 10 recovery usb safe mode form repair (GC).We can see that there is a prerequisite for this operation, that is, the SSD must support windows 10 recovery usb sys disk too small Trim technology, otherwise GC will not show its advantages (this is why only SSDs that support Trim windows 10 recovery usb system drive too small currently have GC functions), and GC The essential difference is when they are processed?How windows 10 recovery usb thre was a p efficient?