In a time when Microsoft developed Windows Vista, solid-state hard drives not so hot, so I did not get the corresponding optimization. Windows 7 is different, Microsoft, solid state hard drive from the very beginning on a key position, the official blog has more detail by the new system, the corresponding optimization measures.
First, solid-state hard disk performance degradation and Trim requested operation
Flash memory block (Block), page (Page) and cell (Cell) must first be erased to write new data, the new solid-state hard drive performance in a very good buy, but with a long time can feel a decline in performance after trying to upgrade the firmware on Intel to be addressed.
Microsoft said that they also observed this phenomenon, but no less serious than we imagined, in fact, devoted to the benchmark tests in addition to the user in the daily operations of the basic feel different.
Of course, manufacturers are still obliged to maximize the maintenance of high performance. First, solid-state hard drive hardware vendors in advance of its full factory erase (similar to low-level hard disk format), and second, to prepare a special room to store explosive write-intensive, enterprise-class hard disk or even to retain up to 50% for this space in order to maintain high long-term sustained write speed.
Microsoft also used in combination with solid-state drive vendors, a "Trim" mechanism. In Windows 7, if a solid-state drive report supports the ATA protocol data set management (DSM) in the Trim command properties, NTFS file system will delete the file when the user requests ATA hard disk drives to solid-state issued a new Trim operating instructions, to tell it relevant page can be safely erased. Solid-state drives are the instructions, they will not rush the implementation of erase operation, but wait until the right opportunity is there again when the write operation, because this time the relevant page has been re-used, do not need to re-implementation of the rub In addition to operating the.
For example, if a block size of 128KB of memory There was a 128KB file, if the file is deleted and the implementation of the Trim operation, solid-state hard drive can prevent this block and this block of bytes to write the follow-up Other bytes required mixing, solid-state hard drive that can greatly reduce the "wear and tear."
In Windows 7 in, Trim the request is not limited to deletion, but also in the area and the volume level of command, file system commands, the System Restore feature fully integrated.
Second, Windows 7 optimized and the default behavior outlined
In the solid-state hard disk, Windows 7 will disable the Disk Defragmenter, because solid-state disk random read operations are very good, order file fragments will not play any help.
Windows 7 will be disabled by default in the solid-state hard drive SuperFetch, ReadyBoost, and start-up and procedures prefetching, these features are designed for traditional hard drives.
Windows 7 the built-in partition creation tools will also consider the characteristics of solid-state hard drive. Of course, the system partition on the SSD of the best.
3, frequently asked questions and dispel doubts
1, Windows 7 will support the Trim Why?
Support. See above.
2, in the solid state hard disk will be disabled by default defrag Why?
Will. Windows 7 defragmentation would rule out solid-state hard disk partition, and if the hard disk partition random read performance than 8MB / s, defrag will ignore it.
8MB / s Microsoft's internal analysis of this indicator is obtained, the final version will be added to the system. In fact, this provides little significance because the solid-state hard drives generally are 11-130MB / s, while the traditional test of 182 hard drive only six more than 2MB / s, everything else is all in the 0.8-1.6MB / s.
3, the solid-state hard disk will disable the SuperFetch Why?
Will, but not absolute.
Microsoft originally intended to complete the solid-state hard drive to disable SuperFetch, but the system encountered in some significant performance degradation, was later discovered that the first generation of solid-state hard disk random write and erase operations too often, eventually become very slow read speed and opened the SuperFetch and other pre-fetching techniques, performance rebounded.
4, NTFS will compress the solid-state hard drive folders and files Why?
Compressed file help to release the free space, but the compression and decompression require additional CPU resources will be more power in a notebook, it is only suitable for less commonly used files on the implementation of the action, and for frequent reading and writing files and folder will be necessary, such as My Documents, such as Internet temporary folder.
5, Windows search index in the solid-state hard disk will be different?
No.
6, BitLocker What optimized for solid-state hard drive?
Yes, the NTFS file system. BitLocker is read for the whole district, encryption, and write, and NTFS file system through the Trim command to help optimize the operation of solid-state hard drive.
7, Media Center configuration in the solid-state hard disk will be different?
Not. Media recording and playback of both continue to operate, and now the unit capacity of solid-state drive prices much more expensive than traditional hard drives, so save and backup is still the preferred mechanical hard disk.
8, solid-state hard disk write cache on What makes sense? If solid-state drives support write cache, Windows 7 What is the appropriate measure?
Some solid-state hard drive in addition to flash memory chips, the main controller, but also a certain amount of RAM as a cache, which is in imitation of the traditional hard disk to cache writes. For such equipment, is expected to Windows 7 in the erase and write commands and traditional hard drive to maintain the same level.
9, RAID SSD meaningful on What?
Yes. Solid-state hard drive and mechanical drive RAID to RAID as a higher performance and reliability.
10, page file should be placed on solid-state hard drive Why?
Yes. Most of the paging file (Pagefile.sys) operations are very small random sustained read or write large, solid-state drives are the best at this place.
Microsoft had to read and write on the page file to track thousands of times and found that the page file to read, write, read more than is 40:1,67% smaller than 4KB, 88% less than 16KB, 62% write not less than 128KB, 45% exactly 1MB.
In short, there is no more suitable than the page file on a solid-state hard disk.
11, hibernation file on solid state hard drives will benefit Why?
Not. hiberfile.sys is large to read, write, and so on the mechanical hard drive or solid-state hard disk are the same.
12, Windows Experience Index performance based on solid-state hard drive to do any adjustments?
Windows 7 by adding some new random read, random write and erase assessment. A good solid-state drives will be 6.5 points above the maximum available out of 7.9, 1.9 points during the test type, 2.9 grading assessment will not appear abnormal.
Of course, if the general performance of solid-state hard drive itself, Windows 7 in scoring at will and almost under Windows Vista, will not be increased accordingly.