Storage card for Rebel XTI
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November 06, 2008, 02:29 PM
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Hi,
I've got a question do YOU think it's worth buying the SANDISK Extreme IV which costs almost twice as much as the Extreme III.
I don't care too much about transvering my data; I am thinking about taking pictures. Will it be slower with the III?
Thx a lot in advance
MasDom
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December 30, 2008, 06:03 PM
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Flash speed heavily depends on the camera and the cardreader. According to the specs:
Newer Ultra III can do 30mb/sec (old Ultra III does about 20mb/sec)
Ultra IV can do 40-45mb/sec
A Rebel XTI probably can't do 30mb/sec anyway. So from the camera's perspective it really won't matter....
Now for the cardreader, most standard cardreader are dog slow... Most cheap ones never do above 5mb/sec, maybe if you didn't buy a crappy one you might get 10mb/sec.
I have a SanDisk Extreme FireWire cardreader (for permanent use) and a SanDisk Extreme USB cardreader (for in my camera bag).
The SDE FireWire cardreader with my Ultra III does (in practise) about 25mb/sec.
The SDE USB cardreader with my Ultra III does (in practise) about 18mb/sec.
Investing in Ultra IV without the FireWire cardreader (which is expensive) is pointless at best.
Buy SanDisk Ultra III, and the SanDisk Extreme USB Cardreader, it's probably the best value you'll be able to get.
Regards,
Pascal de Bruijn
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December 31, 2008, 10:54 AM
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Pascal,
thank you for that great summary.
One additional question, however:
A friend of mine is, well, a little bit "destructive" when it comes to CF slots. She has already tilted two XTi slots (180 Euros each) and a card reader by miracolously bending the pins deep inside. The new card readre will most likely not survive 2008 (hope she does not read this...).
As you are obviously suggesting he purchase of the SanDisk Extreme reader, it must be a good piece of equipment. But is the CF slot deep so that it becomes difficult to insert the card askew?
Thanks and all the best,
Dirk
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December 31, 2008, 12:29 PM
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No clue... cards go in reasonably deep... But not all the way...
But seriously, breaking two XTi slots, I've never had issues like that, neither has anybody I know. And I know quite a few people who use CF...
I'm not trying to be an ass here... but seriously, tell her to handle the card more carefully. The only way the slot in the XTi will break, is if you force things...
The Extreme USB is cheap, it's only 20EUR, so don't worry... Only the FireWire one is 80EUR or so. I can't really recommend it over the USB one, the USB one is very good value.
Regards,
Pascal de Bruijn
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December 31, 2008, 12:57 PM
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Thank you for the info.
Regarding careful operation, well, be entertained by this image:
http://www.ipernity.com/doc/mainzelmann/1283133
It is the inner of an XTi and I still have no clue how to bend the pin like this so deep down in a slot using jut a CF card. But it is possible...
Happy New Year (or, as we say here: Guten Rutsch),
Dirk
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December 31, 2008, 01:41 PM
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I never said it was impossible. I just ment that if a single user breaks 3 CF receptacles, the problem is most likely the user and not the receptacles.
I do agree, that the problem of CF is that it uses pins at all... But this is PCMCIA legacy...
Even though, the cards themselves, are generally a but sturdier than SD...
Regards,
Pascal de Bruijn
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January 01, 2009, 09:13 PM
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Hello everybody,
My laptop has an integrated SD card reader. Is there any way of finding what its maximum speed is?
Regards,
Jaime Clemente
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January 02, 2009, 06:31 PM
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There are lots of disk benchmarking tools... Any of them should be good...
If you're on Linux you can just do (be careful with this, make sure you understand!):
# dd if=/dev/zero of=/media/SD_CARD/zerofile bs=1M count=1000
But don't expect too much, and of course you'll need decent fast SD...
Regards,
Pascal de Bruijn
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January 02, 2009, 07:02 PM
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Thank you for the suggestion. I hope that that instruction creates a file, and does not write the whole disk image. Anyway, I'll copy the card's content first...
Regards,
Jaime Clemente
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January 03, 2009, 02:38 PM
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You should always back up all your data if you use dd and don't exactly know what you are doing. And check the command line twice, especially as root. ;-)
I wondered once why zeroing out a floppy took so much time to start..... hda!=fd0
I had a bent CF connector once too, not as harsh as on Mainzelmann's image. Since then I insert the card in two steps, push soft down until first contactand then gently increase pressure. Not this Rambo clip ramming style you see sometimes.
But I still prefer CF over SD, they are just too small for my hands to handle comfortably outdoors.
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