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

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
these are movie speeds!
By RamarC on 12/22/2009 11:32:18 AM , Rating: 2
Now Jason Bourne really can download an entire Dept of Defense database in the two minutes he's supposed to be in the bathroom and hide the data under his tongue!

RE: these are movie speeds!
By Jeffk464 on 12/22/2009 1:09:19 PM , Rating: 2
Woulnt it be cool if we could put the OS on one of these guys and boot at that read speed.

RE: these are movie speeds!
By kkwst2 on 12/22/09, Rating: 0
RE: these are movie speeds!
By wolrah on 12/22/2009 3:42:34 PM , Rating: 3
Woulnt it be cool if we could put the OS on one of these guys and boot at that read speed.

We can, pretty easily (same as booting from any USB device, since most PC flash readers sit on USB), but as already pointed out these speeds are nothing impressive when compared to already-existing desktop SSDs. They might impact the low end SSD market if the price points fit, but the high end is already long past the theoretical 104MB/sec the article talks about seeing in future products.

exFAT and Apple
By poundsmack on 12/22/2009 12:06:57 PM , Rating: 2
It's a shame that Apple has claimed they will not support exFAT. Though I am sure they will cave when the rest of the industry supports it.

RE: exFAT and Apple
By pattycake0147 on 12/22/2009 3:16:52 PM , Rating: 2
It would also be nice if Sony would support it on the PS3.

By JonnyDough on 12/22/2009 11:59:23 AM , Rating: 2
I have to buy a new card reader? I'm curious as to what the life of these cards is. If I can get a new card reader for under $20 this might work great as a USB boot drive for my XP machines. Can anyone tell me if this might be possible?

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