Memory Cards

Savageduck wrote:

On 2010-11-07 12:42:14 -0800, Alan Lichtenstein said:

Rich wrote:

On Nov 7, 8:35 am, Alan Lichtenstein wrote:

A friend of mine told me that he had heard from someone at Lexar
that in
2-3 years they would no longer be making CF memory Cards, only
manufacturing SDHC and micro SD cards. I realize that this is third
party hearsay, but has anyone else heard that 'hearsay?' And what about
other manufacturers?



They must cost more than SD cards to make, purely from a resource use
standpoint. No wonder they want to do away with them.


Understandable, but just as a curiosity, I compared the write speeds
of a manufacturer's CF and SDHC cards of the same level, and it
appeared that the CF card has a much faster write speed. I saw that
in the latest B & H catalog. Admittedly, it could be a misprint, but
it was repeated, so I'm not sure. I'll have to go and actually see
both cards.

Also, should that be the case, it would appear that most users of
dSLR's would want the faster write speed, making the decision to stop
producing the CF cards 'curious' at best.


The older, slower CF cards are being done away with.
That leaves the faster, pricier CF cards. So If you can find some of
those older slower, less expensive cards running at the same speeds as
the fastest SD cards, and you can live with that, buy them up.

CF cards are going to cost more because they are not making the slower
cards any more, that market need is being filled with SD cards the
fastest being 30MB/s.

Sandisk is offering their Extreme Pro SDHC with a claimed write speed of
45 mb/sec.

On 2010-11-08 16:40:24 -0800, Alan Lichtenstein said:

Savageduck wrote:

On 2010-11-07 12:42:14 -0800, Alan Lichtenstein said:

Rich wrote:

On Nov 7, 8:35 am, Alan Lichtenstein wrote:

A friend of mine told me that he had heard from someone at Lexar that in
2-3 years they would no longer be making CF memory Cards, only
manufacturing SDHC and micro SD cards. I realize that this is third
party hearsay, but has anyone else heard that 'hearsay?' And what about
other manufacturers?



They must cost more than SD cards to make, purely from a resource use
standpoint. No wonder they want to do away with them.


Understandable, but just as a curiosity, I compared the write speeds of
a manufacturer's CF and SDHC cards of the same level, and it appeared
that the CF card has a much faster write speed. I saw that in the
latest B & H catalog. Admittedly, it could be a misprint, but it was
repeated, so I'm not sure. I'll have to go and actually see both cards.

Also, should that be the case, it would appear that most users of
dSLR's would want the faster write speed, making the decision to stop
producing the CF cards 'curious' at best.


The older, slower CF cards are being done away with.
That leaves the faster, pricier CF cards. So If you can find some of
those older slower, less expensive cards running at the same speeds as
the fastest SD cards, and you can live with that, buy them up.

CF cards are going to cost more because they are not making the slower
cards any more, that market need is being filled with SD cards the
fastest being 30MB/s.

Sandisk is offering their Extreme Pro SDHC with a claimed write speed
of 45 mb/sec.

Not on the SanDisk web site I checked. Unless I missed something you
have other sources for. Their fastest SDHC card I see is 30MB/s.
http://www.sandisk.com/products/imaging

I even googled "SanDisk Extreme Pro SDHC" and it seems tough for them to find.

http://www.google.com/search?client=...UTF-8&oe=UTF-8



--
Regards,

Savageduck

Savageduck wrote:
On 2010-11-08 16:40:24 -0800, Alan Lichtenstein said:

Savageduck wrote:

On 2010-11-07 12:42:14 -0800, Alan Lichtenstein said:

Rich wrote:

On Nov 7, 8:35 am, Alan Lichtenstein wrote:

A friend of mine told me that he had heard from someone at Lexar
that in
2-3 years they would no longer be making CF memory Cards, only
manufacturing SDHC and micro SD cards. I realize that this is third
party hearsay, but has anyone else heard that 'hearsay?' And what
about
other manufacturers?




They must cost more than SD cards to make, purely from a resource use
standpoint. No wonder they want to do away with them.



Understandable, but just as a curiosity, I compared the write speeds
of a manufacturer's CF and SDHC cards of the same level, and it
appeared that the CF card has a much faster write speed. I saw that
in the latest B & H catalog. Admittedly, it could be a misprint,
but it was repeated, so I'm not sure. I'll have to go and actually
see both cards.

Also, should that be the case, it would appear that most users of
dSLR's would want the faster write speed, making the decision to
stop producing the CF cards 'curious' at best.



The older, slower CF cards are being done away with.
That leaves the faster, pricier CF cards. So If you can find some of
those older slower, less expensive cards running at the same speeds
as the fastest SD cards, and you can live with that, buy them up.

CF cards are going to cost more because they are not making the
slower cards any more, that market need is being filled with SD
cards the fastest being 30MB/s.

Sandisk is offering their Extreme Pro SDHC with a claimed write speed
of 45 mb/sec.


Not on the SanDisk web site I checked. Unless I missed something you
have other sources for. Their fastest SDHC card I see is 30MB/s.
http://www.sandisk.com/products/imaging

I even googled "SanDisk Extreme Pro SDHC" and it seems tough for them to
find.

http://www.google.com/search?client=...UTF-8&oe=UTF-8

My reference, as I stated above was the new B & H catalog. They picture
a Sandisk SDHC Extreme Pro card with a clear indication on the image of
the card, a 45 mb/sec speed. Now, as I said, it may be a misprint, or
simply just plain wrong, but that's were I got the info from.

Mark F wrote:

NOTE: If anyone gets one of the SanDisk Extreme Pro SDHC Cards, please
try copying a large file from one location to another on the same
card. Be sure the file is not cached someplace and is in fact
actually copied by reading and writing interspersed on the same card.
(It has been my experience that many USB keys and various camera cards
cannot handle this operation with many types of hardware.)

Reading and writing interspersed cannot be handled? How do they
handle switching between reading and writing at all, then?

-Wolfgang

Mark F wrote:
On Wed, 10 Nov 2010 11:13:18 +0100, Wolfgang Weisselberg
Mark F wrote:

NOTE: If anyone gets one of the SanDisk Extreme Pro SDHC Cards, please
try copying a large file from one location to another on the same
card. Be sure the file is not cached someplace and is in fact
actually copied by reading and writing interspersed on the same card.
(It has been my experience that many USB keys and various camera cards
cannot handle this operation with many types of hardware.)

Reading and writing interspersed cannot be handled? How do they
handle switching between reading and writing at all, then?

For most of the combinations of memory devices, computers, and
operating systems that slowed do either:
1. things worked fine

Huh? I thought they slowed ...

2. things were slow, but constant: in other words, instead
of running at say 1/2 of the slower of the device read or write
speed, ran at 1/10 to 1/30 of this speed, but the speed
was fairly constant when averaged over a second or so.
I think that this MIGHT be due to having to flush buffers or
physical blocks, or just to "turn around" the hardware from
read to write or write to read.

However I recently found a several memory models in the same series
(SanDisk Extreme SDHC 30MB/s 16GB and 32GB) that seem to be
getting I/O errors or making the operating system think there
were I/O errors [that the OS didn't log).

Huh? How do you detect I/O errors that don't show up in the
logs?

I used a SanDisk ImageMate All-in-One SDDR-189,
on one machine running Windows XP and on another machine running
Windows 7 the speed. I found the speed to be irregular, seeming to
pause for more than 30 seconds and then transferring a couple of
megabytes of data. This seems to indicate the an I/O error recovery
procedure is being entered by either the card or the operating system.

Nope, that rather sounds like buffering in the OS. Look in
/var/log/* ... oops, sorry, you are using an inferior OS, ok,
then look in the log files for any indication of I/O errors.

The support people at SanDisk say they tried the same model
SanDisk Extreme SDHC 30MB/s card model and the same test but found
no problems. They won't let me have a log file or screen capture,
so I can't be sure that the even the last guy really did a test that
might see a problem.

Well, I presume he tested it right.

-Wolfgang

no-one outside of lexar will know their plans.

i needed a new sd card. with future versatility in mind, i elected to
buy a 2gb 133x professional sd card. of a decent size and fast speed
20mb/sec, i found one on amazon uk. i think lexar are the best overall,
the card has improved speed of my older camera. depends on device.
lexar.com has 2gb compatibility chart,so you can check before-hand. and
i will be able to use in sdhc and sdxc devices in the future, if i want.

the future of CF must be in doubt, as now sd production dwarfs cf,;
economies of scale sre paramount, as in all industries, imo

On 02/24/2011 10:43 AM, Bruce wrote:

Since you seem to be an apologist for 'SD', maybe you can explain why
the fragile arrangement of their contacts plus their thin, light and
flimsy form factor that means they blow away easily if dropped in
breezy conditions

This must be the silliest argument I've ever seen on newsgroups in a
while. Given the capacities of cards, even a trigger-happy amateur will
have a very hard time filling one and so would rarely experiences the
urge to swap cards in the wild.

And if you still want to talk about dropping the memory card outdoors,
tell me how you remove sand & dirt that entered the contacts slots of a
CF card.
--
Bertrand

In article , Bruce
wrote:

Most amateurs find SD cards perfectly satisfactory. They don't tend
to go out shooting in adverse conditions. They don't take cards out
of the camera other than indoors. So it doesn't matter to an amateur
how flimsy they are, or whether they blow away in the wind. SD cards
are well suited to that market.

sd cards don't blow away in the wind, nor are they flimsy. they're even
water resistant, which cf is not.

CF cards appeal strongly to a different market, one that amateurs
simply don't understand. As this thread proves. ;-)

that must be why canon puts both cf and sd in the 1d and 1ds, which are
*not* amateur cameras. they're both big cameras, so space wasn't a
consideration, they could have done 2 cf slots, but they didn't.

"clarity" wrote in message
...

no-one outside of lexar will know their plans.

i needed a new sd card. with future versatility in mind, i elected to
buy a 2gb 133x professional sd card. of a decent size and fast speed
20mb/sec, i found one on amazon uk. i think lexar are the best overall,
the card has improved speed of my older camera. depends on device.
lexar.com has 2gb compatibility chart,so you can check before-hand. and
i will be able to use in sdhc and sdxc devices in the future, if i want.

the future of CF must be in doubt, as now sd production dwarfs cf,;
economies of scale sre paramount, as in all industries, imo


With more and more camera manufacturers changing over to SD cards, the CF
card will be pretty much extinct in a couple of years.
Regards Mike.

On Thu, 24 Feb 2011 12:51:48 +0000, Bruce wrote:

ASCII wrote:
Maybe because not all users of SD cards aren't so fumble fingered
as to have them blow away in the wind,
besides with 8gb of memory I hardly ever remove them from the camera
until I'm safely back home.


Most amateurs find SD cards perfectly satisfactory. They don't tend
to go out shooting in adverse conditions. They don't take cards out
of the camera other than indoors. So it doesn't matter to an amateur
how flimsy they are, or whether they blow away in the wind. SD cards
are well suited to that market.

CF cards appeal strongly to a different market, one that amateurs
simply don't understand. As this thread proves. ;-)

On the contrary, CF cards wouldn't have lasted 2 days under the adverse
conditions that I've had many-months photos shoots. Swamps on rare-orchid
hunts, windy deserts, etc. While I don't like them, Memory Sticks will even
survive a run through a washing machine and drier, let alone a simple
accidental dunk in a swamp. So too will some brands of SD cards. If you
drop a CF card in water or get sand in it, you can kiss your
"equipment-jewelry-defines-pro-status,-not-any-talent-nor-common-sense"
career goodbye.

What is it about DSLRs that turn all their owners into total idiots? This
is a bit of the chicken & egg thing. Is it the DSLR that made them into
total idiots? Or do only total idiots buy DSLRs? Either way, they're all
losers.