Author Topic: Which Maximum Speed For Sd For C1000?  (Read 5333 times)

gettons1980

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Which Maximum Speed For Sd For C1000?
« on: August 20, 2006, 11:38:47 am »
Hi to everybody, I wish to know which type of speed is recognized in a c1000
I've seen that are many SD cards with some speeds such



KINGSTON SD ELITE PRO 1GB - HIGH SPEED   ( I THINK 50x )
SANDISK SD Ultra II 66x 1 Gb
SanDisk Extreme III SDâ„¢ 1GB
Kingston Secure Digital Ultimate (SD Ultimate) - 133x



and the last standard

kingston 1GB Secure Digital Card


Do you know which can run at the declared speed and which not ?

Da_Blitz

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Which Maximum Speed For Sd For C1000?
« Reply #1 on: August 21, 2006, 02:17:08 am »
if i were you and was runing the stock kernel or cacko then i would just go with the cheapest, the Z generally cant get high speed out of SD cards
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gettons1980

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Which Maximum Speed For Sd For C1000?
« Reply #2 on: August 21, 2006, 04:30:04 am »
Quote
if i were you and was runing the stock kernel or cacko then i would just go with the cheapest, the Z generally cant get high speed out of SD cards
[div align=\"right\"][a href=\"index.php?act=findpost&pid=139256\"][{POST_SNAPBACK}][/a][/div]
do you know the maximu speed he can recognize?

iamasmith

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Which Maximum Speed For Sd For C1000?
« Reply #3 on: August 21, 2006, 07:25:14 am »
The speed question is probably something that can be calculated however the issue is transfer to and from the card and not write speed internally to the card.

Default drivers will use 1 rather than 4 channels to transfer since they run in MMC mode. Since you won't be able to push data at the card faster than the superfast memory can write it there is a break point where it is useless to go for a faster card. I can't tell you what this is though

This is actually a software issue AFAIK and the Z does have hardware capable of supporting all 4 channels, its just that the hardware is undocumented.

-Andy
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Microdrive replaced with 4Gb SanDisk Extreme III card

climber

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Which Maximum Speed For Sd For C1000?
« Reply #4 on: August 21, 2006, 08:10:34 am »
Is there more speed available with a Compact Flash Card because they don 't run at the MMC mode?

climber

gettons1980

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Which Maximum Speed For Sd For C1000?
« Reply #5 on: August 21, 2006, 08:26:55 am »
Quote
The speed question is probably something that can be calculated however the issue is transfer to and from the card and not write speed internally to the card.

Default drivers will use 1 rather than 4 channels to transfer since they run in MMC mode. Since you won't be able to push data at the card faster than the superfast memory can write it there is a break point where it is useless to go for a faster card. I can't tell you what this is though

This is actually a software issue AFAIK and the Z does have hardware capable of supporting all 4 channels, its just that the hardware is undocumented.

-Andy
[div align=\"right\"][a href=\"index.php?act=findpost&pid=139283\"][{POST_SNAPBACK}][/a][/div]


ok thanks, I know the speed depends on the hardware .... all is based on the hardware...
But do you know what type of speed the zaurus hardware can run?
Because it's not useful to buy an SD 80x if they are supported only to operate at 30x
I need only this cofiguration to decide what type of SD to purchase...

stupkid

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Which Maximum Speed For Sd For C1000?
« Reply #6 on: August 21, 2006, 11:31:30 am »
Quote
ok thanks, I know the speed depends on the hardware .... all is based on the hardware...
But do you know what type of speed the zaurus hardware can run?
Because it's not useful to buy an SD 80x if they are supported only to operate at 30x
I need only this cofiguration to decide what type of SD to purchase...[div align=\"right\"][a href=\"index.php?act=findpost&pid=139289\"][{POST_SNAPBACK}][/a][/div]

Don't bother getting the fast SD cards since you won't be able to realize the additional I/O on the Z.  That's the simple answer.

Zaurus SL-C3200 pdaXii13v2 5.5 / Ambicom WC1100C-CF / Socket Bluetooth Rev G


OpenMoko FreeRunner - Running Tweaked OM2008.x Image

Meanie

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Which Maximum Speed For Sd For C1000?
« Reply #7 on: August 21, 2006, 08:48:55 pm »
Quote
Quote
The speed question is probably something that can be calculated however the issue is transfer to and from the card and not write speed internally to the card.

Default drivers will use 1 rather than 4 channels to transfer since they run in MMC mode. Since you won't be able to push data at the card faster than the superfast memory can write it there is a break point where it is useless to go for a faster card. I can't tell you what this is though

This is actually a software issue AFAIK and the Z does have hardware capable of supporting all 4 channels, its just that the hardware is undocumented.

-Andy
[div align=\"right\"][a href=\"index.php?act=findpost&pid=139283\"][{POST_SNAPBACK}][/a][/div]


ok thanks, I know the speed depends on the hardware .... all is based on the hardware...
But do you know what type of speed the zaurus hardware can run?
Because it's not useful to buy an SD 80x if they are supported only to operate at 30x
I need only this cofiguration to decide what type of SD to purchase...
[div align=\"right\"][a href=\"index.php?act=findpost&pid=139289\"][{POST_SNAPBACK}][/a][/div]

buy the cheapest one you can find for the particular size you are looking for. all the currently available SD cards are way faster than what the Zaurus can do anyway unless you buy a very very old card from ebay like a 16MB SD...
SL-C3000 - pdaXii13 build5.4.9 (based on pdaXrom beta3) / SL-C3100 - Sharp ROM 1.02 JP (heavily customised)
Netgear MA701 CF, SanDisk ConnectPlus CF, Socket Bluetooth CF, 4GB Kingston CF,  4GB pqi SD, 4GB ChoiceOnly SD, 2GB SanDisk SD USB Plus, 1GB SanDisk USB Plus, 1GB Transcend SD, 2GB SanDisk MicroSD with SD adaptor, Piel Frama Leather Case, GoldX 5-in-1 USB cable, USB hub, USB mouse, USB keyboard, USB ethernet, USB HDD, many other USB accessories...
(Zaurus SL-C3000 owner since March 14. 2005, Zaurus SL-C3100 owner since September 21. 2005)
http://members.iinet.net.au/~wyso/myZaurus - zBook3K

gettons1980

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Which Maximum Speed For Sd For C1000?
« Reply #8 on: August 21, 2006, 09:24:09 pm »
Thanks so much to everyone...
I 'll buy a 1GB
Sandisk or Kingstone, beacuse of their quality,but not for their speed...

deluxe

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Which Maximum Speed For Sd For C1000?
« Reply #9 on: August 22, 2006, 11:24:44 am »
I just bought a 2GB SD card from PQI for $22 after rebate of $16 !!! Damned good deal. It's a 150x card.
Can't say as I notice much/any speeding up of transfers in the Zaurus, but it allows for faster transfers in the PC card reader.
If Moores Law holds for the immediate future, I reckoned we should be able to get a $22 SD card that holds two Terabytes in about 10 years ;-)
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SL-C3100, Cacko "heavy" ROM.
SL-C1000, Cacko "heavy" ROM.
A SL-5500 with TKrom.
Ambicom and Symbol CF wifi, 8gb Seagate Microdrive, <4gb Transcend SD. Assorted other digital detritus.
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Owner of a Nokia n810 Internet Tablet.
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