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Samsung 2.5" SATA II Solid State Drive sample  (Source: Samsung)
Samsung cranks up the speeds of its solid-state drives

Solid-state disks (SSDs) are seen as the next plateau for mobile computing. Companies like Alienware and Dell offer the high-performance drives in their notebook computers and end-users can add SSDs to their own notebooks thanks to online retailers like Newegg.

Samsung first starting making waves in the SSD arena with its 32GB drive in March 2006 and followed up with a faster 64GB unit in June of 2007. Today, Samsung is once again stepping up its efforts in the SSD arena.

The company has announced a new generation of 64GB SSDs which use 8Gb, 50nm single-level-cell (SLC) flash memory chips. The drives, which will be available in 1.8" and 2.5" form-factors, also feature a new SATA II interface for faster performance.

The faster chips and SATA II interface gives the new SSDs sequential write speeds of 100MB/sec and sequential reads of 120MB/sec. These numbers completely obliterate the previous Samsung 64GB offering which is rated at 45MB/sec write and 65MB/sec read. Samsung's first-generation 32GB SSD is rated for 30MB/sec writes and 53MB/sec reads.

"The 64GB SATA II SSD is based on Samsung’s cutting-edge NAND technology with dramatically improved performance specs that are taking system performance to a whole new level of efficiency," stated Samsung director of NAND flash marketing Jim Elliott.

Samsung's new SSDs also now compare favorably with Mtron's family of SSDs which are available in 2.5" and 3.5" form-factors. Those drives feature write speeds of 90MB/sec and read speeds of 120MB/sec.

Samsung is currently sampling the new SATA II SSDs and production examples should follow in early 2008.


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RE: Where are we with...
By Chris Peredun on 11/5/2007 2:18:19 PM , Rating: 3
Actually, it's "100,000 erase" - and as TomZ pointed out, even the weakest NAND flash these days is being rated rather well. With wear-leveling implemented at the hardware level, it will only erase cells when it needs to.

Even assuming the rather abysmal (by today's standards) 10,000 erase cycle limit, that means you'll have to write and subsequently erase 10,000 times the drive's capacity - in the case of the 32GB SSD, you're talking about 320 terabytes of data.

A million erase cycles before failure means you're looking at 320 petabytes .


RE: Where are we with...
By lennylim on 11/5/2007 4:54:23 PM , Rating: 1
Some areas are more prone to change, for example the file index. Even accessing it will modify the "last accessed date" (at least under NTFS).


RE: Where are we with...
By MGSsancho on 11/5/2007 5:40:32 PM , Rating: 2
USB thumb drives uses FAT or FAT32 file system so they work great on all OSes. now SSDs, your correct.


RE: Where are we with...
By TomZ on 11/5/2007 5:57:32 PM , Rating: 2
quote:
Some areas are more prone to change, for example the file index. Even accessing it will modify the "last accessed date" (at least under NTFS).

The wear leveling algorithm will transparently re-map these sectors to different locations on the physical chips. This is kind of similar to how IDE HDDs remap sectors when a bad sector is detected by the drive.


RE: Where are we with...
By Pauli on 11/5/2007 6:45:56 PM , Rating: 2
So, if I have the drive filled up with say, 25GBs of video files that I keep on there without deleting, and run the OS (along with its associated page file) and apps on the remaining space, the wear-leveling algorithm would automatically move the video file data as it needs to? Sounds like a big performance hit with all of these additional writes that would need to be performed.


RE: Where are we with...
By GreenEnvt on 11/6/2007 9:36:23 AM , Rating: 2
Why would it move the video files?
If the pc is updating the last accessed time of a file like the page file, it would write that to free space if available, not move existing files around, which would cause even more writes.


RE: Where are we with...
By Pauli on 11/6/2007 12:39:31 PM , Rating: 2
That's what I'm asking. Would this situation cause the page file to overwrite the same space on the flash memory or would the wear-leveling algorithms spread the writes around to other areas of the memory that already contain files (thus, having to move them around)?


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