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SDXC cards will be available in capacities up to 2TB

The Secure Digital (SD) format has come a long way since its original inception. Originally conceived as an offshoot of the Multimedia Card (MMC) format, SD cards have matured over the years into the Secure Digital High Capacity (SDHC) versions that are prevalent today for capacities greater than 2GB.

Current SDHC cards are artificially limited to just 32GB, which means that a new standard is being ushered in to boost capacities into the stratosphere. As a result, the new Secure Digital eXtended Capacity (SDXC) format was introduced today at CES. SDXC cards have a theoretical maximum capacity of 2TB and theoretical maximum read/write speeds of 300MB/sec.

The first SDXC cards will hit the market during the first quarter of 2009; however, these first generation cards will have a maximum transfer rate of 104 MB/sec.

"SDXC combines a higher capacity roadmap with faster transfer speeds as a means to exploit NAND flash memory technology as a compelling choice for portable memory storage and interoperability," said Gartner's Joseph Unsworth, research director, NAND Flash Semiconductors. "With industry support, SDXC presents manufacturers with the opportunity to kindle consumer demand for more advanced handset features and functionality in consumer electronics behind the ubiquitous SD interface."

"SDXC is a large-capacity card that can store more than 4,000 RAW images, which is the uncompressed mode professionals use, and 17,000 of the fine-mode most consumers use. That capacity, combined with the exFAT file system, increases movie recording time and reduces starting time to improve photo-capturing opportunities," said Canon General Manager Shigeto Kanda. "Improvements in interface speed allow further increases in continuous shooting speed and higher resolution movie recordings. As a memory card well suited to small-sized user-friendly digital cameras, the SDXC specification will help consumers realize the full potential of our cameras."

We should expect to first seeing SDXC cards from the usual suspects such as SanDisk, Lexar, and Kingston. SDXC will more than likely carry a hefty premium over current SDHC cards, but expect to see that price differential close with time.



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SDXC needs matching port.
By teckytech9 on 1/7/2009 3:00:58 PM , Rating: 2
quote:
The new SDXC specification provides up to 2 terabytes storage capacity and accelerates SD interface read/write speeds to 104 megabytes per second this year, with a road map to 300 megabytes per second.

Current USB 2.0 and Firewire rates won't match the speeds offered in 1Q 2009.

(USB 2.0) rate of 480 Mbit/s (60 MB/s)
(FireWire 400) rates to 393.216 Mbit/s (49.152 MB/s)

Test show that FireWire performs better than USB 2.0. Assuming that a large file needs to be transferred, the sustained rates are usually half or less than the theoretical maximum. Hence, the upgrades needed to the ports are:

(USB 3.0) rate of 5.0 Gbit/s (625 MB/s)
FireWire 3200 rates to 3144 Mbit/S (393MB/s)

In the interim, eSATA (300MB/s) seems to be the better option to utilize these SDXC cards. Assuming one can utilize these cards for external storage then eSATA has the S.M.A.R.T advantage. The only drawback is the absence of power and lack of accessible eSATA ports on older PC cases. I'd assume that one could find a vacant SATA port on their motherboard, and remove a rear metal latch and attach the SATA cable accordingly.

Perhaps this paves the way for thumb drive makers in designing rechargeable devices using future SDXC cards. The SATA 3.0 standard is just around the corner too.




RE: SDXC needs matching port.
By TomZ on 1/7/2009 3:15:18 PM , Rating: 3
quote:
The only drawback [with eSATA] is the absence of power...
There is a new development to add power over eSATA, if you haven't come across it yet:

http://news.cnet.com/8301-17938_105-9850343-1.html


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