Definition

enterprise MLC (eMLC)

Enterprise MLC (eMLC) is a type of multi-level cell (MLC) flash that has been enhanced to accommodate more write cycles than consumer-grade MLC flash offers.

Individual consumer MLC cells can only provide 3,000 to 10,000 write cycles, while enterprise MLC cells can handle 20,000 to 30,000 write cycles. In the enterprise, eMLC can serve as a compromise between inexpensive MLC flash and very expensive single-level cell (SLC) flash.

Typically, eMLC is 2-bit, while consumer MLC flash is 3 or 4-bit. In general, the more bits a flash cell has, the fewer write cycles it will have. Because eMLC flash media has more program-erase (P/E) cycles than consumer MLC, it has greater endurance and can tolerate the types of workloads that enterprise applications require.

A primary focus of eMLC vendors is to further improve write endurance and make MLC flash as reliable and long-lived as SLC flash. There are a number of techniques that vendors are using to improve write endurance, including:

  • Distributing input/output (I/O) evenly across the entire flash drive, an approach called wear leveling.
  • Improving the unrecoverable bit error rate (UBER) by creating better algorithms.
  • Prolonging the time before the drive becomes unreliable by over-provisioning the flash media.
  • Reducing write amplification.

 

This was last updated in February 2012
Posted by: Margaret Rouse

Email Alerts

Register now to receive SearchSolidStateStorage.com-related news, tips and more, delivered to your inbox.
By submitting you agree to receive email from TechTarget and its partners. If you reside outside of the United States, you consent to having your personal data transferred to and processed in the United States. Privacy

More News and Tutorials

Do you have something to add to this definition? Let us know.

Send your comments to techterms@whatis.com

There are Comments. Add yours.

 
TIP: Want to include a code block in your comment? Use <pre> or <code> tags around the desired text. Ex: <code>insert code</code>

REGISTER or login:

Forgot Password?
By submitting you agree to receive email from TechTarget and its partners. If you reside outside of the United States, you consent to having your personal data transferred to and processed in the United States. Privacy
Sort by: OldestNewest

Forgot Password?

No problem! Submit your e-mail address below. We'll send you an email containing your password.

Your password has been sent to: