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32 GB SD card is coming!
Toshiba announced it in August 2007 last year and they indicated that
it will be ready for January 2008. Panasonic has just introduced it recently for market use in the latest CES convention. It heard that it costs about $700 in Japan. Some questions to ponder: 1. I wonder about a physical limit in storage for the current size of an SD card. How far do you thing that they can squeeze in the amount of memory in that size of card? Could it become a 50, 100, 200 GB SD card in the future. Why do they multiply in the order of 1,2,4,8,16,32, etc. Why not in nice number like 5, 10, 20, 30, 40, 50 GB, etc (metric)? 2. On the back of my regular SD card, there are approx. 9 contact areas which connect into the terminal. Are all those 9 contacts currently utilized for a typical usage in a digital camera? Or perhaps that they only use 2-3 contacts and the others are just reserves for future use? I noticed similar thing for a telephone jack. There are those phone cables with only 2 connection wires inside (cheaper), and there are with more wires (which is perhaps capable for faster connection or other accessories in a phone - just guessing). Is there a technical discussion in the internet about these contacts and/or the details inside an SD card? 3. They said about 32GB SD card. What about the Compact Flash card? What is the largest size available currently for CF? Is CF, xD and Sony stick will eventually be abandoned in favour of SD cards? (just like the wars of betamax vs VHS, and recently between blue ray and HD DVD). I believe that SD card was pioneered by Toshiba. 4. For an average usage in a digital camera, how useful is a 32 GB card? Would you prefer to carry 4x8 GB SD card or one 32GB card? Is an 8GB card more than enough for a digital camera? Is the increase of GB in storage will be matched with higher and higher MP cameras? Will the future commercial digital cameras in the market ever reach, say 32 or 64 MP cameras? I assume current RAW files are now about the size of 25MB each. Do professional cameras produce larger size RAW files? I know that there are 30 MP or perhaps even more MP in current professional cameras ( 6x4.5 of 6x7 size cameras). 5. Is the new 32 GB SD card compatible for all current digital cameras, regardless of features and prices? It was mentioned something about High density SDHC usage, and I wonder if my cheap $100 camera, or my 4 years old camera (3MP) can handle it. Or is this for high end cost, latest model, and high MP cameras' usage only? Thanks for the input and discussion |
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32 GB SD card is coming!
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#3
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32 GB SD card is coming!
wrote:
[SD cards] 1. Why do they multiply in the order of 1,2,4,8,16,32, etc. Why not in nice number like 5, 10, 20, 30, 40, 50 GB, etc (metric)? Because the native language of the computers we have today is binary, not decimal. BTW: metric is something different. 2. On the back of my regular SD card, there are approx. 9 contact areas which connect into the terminal. Are all those 9 contacts currently utilized for a typical usage in a digital camera? See e.g. http://pinouts.ru/Memory/sdcard_pinout.shtml Or perhaps that they only use 2-3 contacts and the others are just reserves for future use? I noticed similar thing for a telephone jack. There are those phone cables with only 2 connection wires inside (cheaper), and there are with more wires (which is perhaps capable for faster connection or other accessories in a phone - just guessing). Is there a technical discussion in the internet about these contacts and/or the details inside an SD card? See http://en.wikipedia.org/wiki/Secure_Digital_card for a phletora of more links. 3. They said about 32GB SD card. What about the Compact Flash card? Usually CF is about half a year ahead of the other formats and 32GB CF are indeed availaible today, although still a bit hard to find. What is the largest size available currently for CF? Is CF, xD and Sony stick will eventually be abandoned in favour of SD cards? (just like the wars of betamax vs VHS, and recently between blue ray and HD DVD). I believe that SD card was pioneered by Toshiba. The CF interface which is the same as PCMCIA just in a different form factor has too many technical advantages over SD, whereas SD is often more liked because the cards are smaller and the connectors less fragile. Those two will be sticking around for a long time. The other formats are too proprietary and IMO will die slowly just like the other extinct custom formats. 4. For an average usage in a digital camera, how useful is a 32 GB card? Would you prefer to carry 4x8 GB SD card or one 32GB card? Please see the previous heated discussions on that topic, no need to beat a dead horse all over again. the future commercial digital cameras in the market ever reach, say 32 or 64 MP cameras? I assume current RAW files are now about the size of 25MB each. "Predictions are difficult, in particular when they are about the future." But if history is any indication, then yes, sensor sizes will increase, although today's cameras already have more resolution than 95% of all photographers ever need. Just consider, how many people are happy with those crappy pictures from cell phones. Do professional cameras produce larger size RAW files? I Please define professional. Aside of that, the size of a RAW file depends on the size of the sensor and if used somewhat on the compression algorithm. 5. Is the new 32 GB SD card compatible for all current digital cameras, regardless of features and prices? Of course not. The original SD as defined in 2000 is suffering from the infamous 2GB limit. Therefore after only 6 years the SDA had to create a new standard SDHC. See the previously mentioned Wikipedia article, sections "5.1 Compatibility issues with 2 GB and larger cards" and "6.1 SD and SDHC compatibility issues" for details. In addition to that there is also the question if your camera can handle a file system, that supports more than 2GB or if it is limited to FAT16 only. something about High density SDHC usage, and I wonder if my cheap $100 camera, or my 4 years old camera (3MP) can handle it. Or is this for high end cost, latest model, and high MP cameras' usage only? Cameras before 2006 cannot possibly support SDHC because SDHC wasn't defined until then. As for the file system: depends how forward thinking the firmware designers were and if they included support for other filesystems beside FAT16. While file system support is purely a software issue and could be added by a firmware update if the manufacturer is inclined to to so, I am not sure about SDHC. I think SDHC requires new hardware circuits, but I am not certain. jue |
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32 GB SD card is coming!
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#5
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32 GB SD card is coming!
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#7
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32 GB SD card is coming!
On Sun, 13 Jan 2008 19:34:33 -0000, Deep Reset wrote:
ermm, the data *is* transferred serially. Ok, I was mistaken and multiplexing isn't used. I thought that I read years ago that some PDAs which used both MMC and SD cards had a faster data rate due to using a wider data bus, but that's probably not true. I doubt that the difference was that SD cards transferred data on multiple serial lines, but the way I'm going today, I'd better not assume anything else. With SD using serial data transfer, it may be a point in favor of CF cards, which should then have the potential to have a much greater data transfer rate. For me though, SD is fast enough. But then I use them in still cameras, not video cameras. I saw one demonstrated on TV today that had 60GB of internal memory, said to be enough for 2 hours of video at its finest resolution. They showed a 16GB card for it that looked like SD (I didn't hear that part of the presentation). The camera might have been a Canon. |
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32 GB SD card is coming!
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#9
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32 GB SD card is coming!
On Sun, 13 Jan 2008 15:51:26 -0500, ASAAR wrote:
With SD using serial data transfer, it may be a point in favor of CF cards, which should then have the potential to have a much greater data transfer rate. For me though, SD is fast enough. But Serial data transfer has much higher potential data rates. I can get into the technical reasons why if you want. But if you feel like doing your own research, just look up why SATA is faster than PATA. Of course, that doesn't mean much when comparing CF to SD because the bus I/O transfer rate isn't the limiting speed factor for either. Steve |
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32 GB SD card is coming!
"George Kerby" a écrit dans le message de news: ... On 1/13/08 9:56 AM, in article , " wrote: 1. I wonder about a physical limit in storage for the current size of an SD card. How far do you thing that they can squeeze in the amount of memory in that size of card? Could it become a 50, 100, 200 GB SD card in the future. Why do they multiply in the order of 1,2,4,8,16,32, etc. Why not in nice number like 5, 10, 20, 30, 40, 50 GB, etc (metric)? Because they were invented by cartoon characters who have only three fingers and a thumb. Simple. LOL Best one yet Jean |
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