Webopedia on Google+Webopedia on TwitterWebopedia on FacebookTech Bytes Blog
Main » TERM » T »

Trim

A feature of the Data Set management command available in the ATA8-ACS-2 specification. The command is used in the operating system used to wipe invalid data blocks on solid-state drives (SSD) which are no longer in use - including data blocks which have been left by deleted files.

Traditionally, flash media could not overwrite existing data as it first would need to first perform a 512KB block erase. Overwriting data on a SSD, required a longer read-modify-write operation which decreased the performance and speed of the SSD. The Trim command enables file system information to be collected by the OS and sends it to the SSD controller, which otherwise would not know it could delete those blocks.

The purpose of Trim is to improve the speed of SSD drives and ultimately boost the drives' overall read and write performance. Both the operating system and  SSD firmware must support Trim. Trim may also be referred to as DisableDeleteNotify, or SSD Optimizer.

See also "Solid State Drives Get Faster with TRIM" on EnterpriseStorageForum.
Learn more about storage management on Enterprise Storage Forum.







TECH RESOURCES FROM OUR PARTNERS
DID YOU KNOW?
It's Happening Now: Perceptual Computing is Real

Perceptual computing is the ability for a computer to recognize what is going on around it. More specifically, the computer can perceive the... Read More »

Apple Pay Promises to Strengthen Payment Security

Experts believe that Apple Pay and other competitive payment systems will be far more secure than cards, even cards equipped with EMV chips. Read More »

The Great Data Storage Debate: Is Tape Dead?

Tape clearly is on the decline. But remember, legacy systems can hang for a shockingly long time. Read More »

QUICK REFERENCE
Network Fundamentals Study Guide

A network is a group of two or more computer systems or devices, linked together to share resources, exchange files and electronic communications.... Read More »

Computer Architecture Study Guide

This Webopedia  study guide describes the different parts of a computer system and their relations. Read More »

Webopedia Polls

The trend for the past two years has been for shoppers to spend more online during the holiday season. How do you typically shop for holiday... Read More »