Solid-state drives utilise NAND Flash memory
A Toshiba Electronics Europe product story
Edited by the Electronicstalk editorial team Jan 8, 2010
Toshiba Corporation has expanded its range of NAND Flash solid-state drives (SSDs) based on the company's 32nm multi-level-cell NAND Flash memories.
The latest drives include a128-gigabyte (GB) half-slim/mSATA SG Series SSD modules, which are suitable for a variety of applications including mini-mobile and netbook PCs.
Also released is the HG Series of drives, which is said to deliver a high level of performance for notebook computers plus gaming and home entertainment systems.
With a maximum sequential read speed of 180MB/s and a maximum sequential write speed of 70MB/s, SG Series drives provide design flexibility and offer space and cost savings that are claimed to surpass SSDs in hard-drive form factors and cases; the 128GB modules are one-seventh the volume and one-eighth the weight of 2.5in form factor SSDs and consume a fraction of the power.
Toshiba's third-generation HG high-performance SSDs have an advanced MLC controller that supports higher read speeds, parallel data transfers and wear levelling to optimise performance.
The drives achieve improved system responsiveness with a maximum sequential read speed of 250MB/s and maximum sequential write speed of 180MB/s, as well as improving the overall computing experience by offering fast boot and application loading times.
They will be made available in 64GB, 128GB, 256GB and 512GB capacities in a standard 9.5mm (2.5in case), as well as in a special 7mm-thick 2.5in case in 128GB and 256GB capacities.
Smaller 1.8in drives are available in 64GB, 128GB and 256GB capacities in a standard 1.8in disk-drive case or as caseless or LIF-modules.
The drives also offer AES data encryption to support authorised-only data access.
Both series support the Trim command implemented in Windows 7.
In earlier models of SSDs, a data block from which data was deleted was flagged as not in use and ignored by the controller.
Once all the memory cells were written to once, this approach slowed down SSD operation.
Trim enables the OS to tell the SSD controller that the data can be deleted, freeing the blocks for subsequent use and maintaining SSD performance across its life.
Samples of the drives will be available in the first quarter of 2010, with mass production scheduled for the second quarter.
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