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Print 12 comment(s) - last by corduroygt.. on Dec 23 at 1:58 AM

Mass production in spring

The Secure Digital eXtended Capacity (SDXC) format was announced almost a year ago at the 2009 International Consumer Electronics Show (CES). It was designed to replace ubiquitous Secure Digital High Capacity (SDHC) flash memory cards in computers, digital cameras, and other portable media devices.

SDXC has a maximum theoretical capacity of 2TB using the exFAT file system and could eventually reach speeds as high as 300 MB/s. However, those speeds will only be realized with the Secure Digital Memory Standard 4.0 specification due in the spring. The new spec will add an additional serial pin in order to enable 300MB/s operation, but will still be backwards compatible with SDHC, SD, and MMC cards.

The current SD 3.0 specification released in April will serve as a transitionary standard with added support for Ultra-High-Speed 104. UHS104 enables read and write speeds as high as 104MB/s, and is compatible with current SD 2.0 specification SDHC readers. There will be SDXC and SDHC cards using UHS104 during this transition. However, UHS104 SDHC cards will still be limited to 32GB due to the use of the FAT32 file system.

Some card reader manufacturers are waiting for SD 4.0 to support SDXC, although JMicron is a notable exception. However, computer OEMs are eager to support SDXC and are already working on designs complying with SD 3.0 and offering support for UHS104.

Toshiba has disclosed to DailyTech that its UHS104 SDXC and SDHC cards are already sampling to key OEMs. Its first SDXC offering is a 64GB card (THNSU064GAA2BC) capable of reading data at 60MB/s and writing data at 35MB/s. The company is also sampling 32GB and 16GB SDHC cards with those speeds. Mass production of all three is slated to start in the spring of next year.



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Limited to 32GB due to FAT32?
By corduroygt on 12/22/2009 11:44:34 AM , Rating: 2
I guess they never heard of a free 200kb utility called Fat32Formatter, I've formatted 500GB drives with a single FAT32 partition with it.




RE: Limited to 32GB due to FAT32?
By Motoman on 12/22/2009 12:34:31 PM , Rating: 4
...why?


RE: Limited to 32GB due to FAT32?
By corduroygt on 12/23/2009 1:58:12 AM , Rating: 2
To use as an external drive with the PS3 and a DVD player with USB input to play video files from.


RE: Limited to 32GB due to FAT32?
By nafhan on 12/22/2009 12:51:15 PM , Rating: 2
I had a 120GB drive formatted as FAT32 several years ago for compatibility reasons. The 32GB limit is artificially imposed by MS's formatting utility. Drives up to 2TB in size can be formatted as FAT32 with third party utilities. However, the real problem with FAT 32 is the limit on file size of 4GB, making things like saving a DVD ISO or virtual machine image impossible.


RE: Limited to 32GB due to FAT32?
By dagamer34 on 12/22/09, Rating: 0
“And I don't know why [Apple is] acting like it’s superior. I don't even get it. What are they trying to say?” -- Bill Gates on the Mac ads














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