How Windows 7 will, and won't, work better with SSDs

Microsoft cites 4 ways that Windows 7 will support solid-state drives better than XP or Vista does

Defragging disks speed ups the reading of data from conventional hard drives by moving similar data together. But flash-based SSDs are already fast at reading data. Rather, SSDs are slow at writing data. Moreover, the process of erasing and moving data requires "flashing" the memory cells with high voltage. That gradually wears out the SSD.

Defragmentation thus shortens an SSD's lifespan without improving performance, Shu said.

Second, Windows 7's new "trim" feature will improve performance three ways. It will: Reduce the amount of data to be deleted, which improves the SSD's lifespan; delete garbage data in advance, which speeds up writing of data; and maximize the amount of unused data, which helps even out the wear and tear on the SSD, Shu said.

Third, Windows 7 will partition the SSD more efficiently to cut down on unnecessary read-write cycles, Shu said. This requires Windows 7 to be installed fresh and not upgraded from XP, he said, since the latter OS formats SSDs in an inefficient way.

Finally, Microsoft plans to create a certification program for SSDs. To win the software maker's logo of approval, SSDs must identify themselves to Windows 7 properly, prioritize data reads over slower data writes, comply with the Serial ATA (SATA) drive interface for faster connections, and more, Shu said.

On the other hand, Microsoft is not taking more radical steps. For instance, it's not trying any tricks to decrease the number of times data is written, such as using RAM to cache data, Shu said.

Writing data to flash memory, especially small amounts of it, takes 100 times longer than reading it, according to SanDisk.

SanDisk's Barnetson agrees that Microsoft is limited by what it can do in this vein.

"The challenge is that it's not just Windows, it's all of the applications constantly issuing commands to the SSD," he said. Software vendors "aren't going to change, that's the reality of it."

Moreover, Microsoft appears unlikely to have Windows 7 adopt a new disk interface technology written specifically to boost the speed and longevity of SSDs. It's called Non-Volatile Memory Host Controller Interface. Developed by Intel, NVMHCI would replace the ATA interface that was developed originally for hard disk drives (though, out of necessity, also used by SSDs today).

Tags SSDWindows 7

Keep up with the latest tech news, reviews and previews by subscribing to the Good Gear Guide newsletter.

Eric Lai

Computerworld

Comments

Comments are now closed.

Most Popular Reviews

Follow Us

Best Deals on GoodGearGuide

Shopping.com

Latest News Articles

Resources

GGG Evaluation Team

Kathy Cassidy

STYLISTIC Q702

First impression on unpacking the Q702 test unit was the solid feel and clean, minimalist styling.

Anthony Grifoni

STYLISTIC Q572

For work use, Microsoft Word and Excel programs pre-installed on the device are adequate for preparing short documents.

Steph Mundell

LIFEBOOK UH574

The Fujitsu LifeBook UH574 allowed for great mobility without being obnoxiously heavy or clunky. Its twelve hours of battery life did not disappoint.

Andrew Mitsi

STYLISTIC Q702

The screen was particularly good. It is bright and visible from most angles, however heat is an issue, particularly around the Windows button on the front, and on the back where the battery housing is located.

Simon Harriott

STYLISTIC Q702

My first impression after unboxing the Q702 is that it is a nice looking unit. Styling is somewhat minimalist but very effective. The tablet part, once detached, has a nice weight, and no buttons or switches are located in awkward or intrusive positions.

Latest Jobs

Shopping.com

Don’t have an account? Sign up here

Don't have an account? Sign up now

Forgot password?