"kony" wrote in message
...
| On Tue, 27 May 2008 17:31:38 +0800, "k"
| wrote:
| Flash Memory Toolkit is a handy program but it can't provide
| information used to decide the manufactuer claim is untrue.

no it can't. the tests were run by companies and reviewers who ran both
comparitive tests and who had access to far better test equipment than I

however, using the same PCMCIA 5 in 1 card reader on an SCSI PC card slot, I
have found some low end microSD card providing surprising comparivite speeds
when also testing higher end SD cards

Likewise with CF cards on an IDE cable


| The manufacturer claim is based on an ideal environment and
| transfer, while many of the following can cause a lower
| rate:
|
| - Benchmark write access pattern

formatted cards tend to get around thee worst limitations

| - Inefficiencies or bottlenecks in the device using the
| card.

IDE is pretty good.. SCSI not bad either


| - Inefficiencies or bottlenecks in the (PC USB) card reader.
| - Inefficiencies or bottlenecks in the PC USB itself.

I've skipped the USB parts.. though comparable results wer found using the
inetrnal USB bus and an internal reader
|
| - Inefficiency in the filesystem
|
| - File sizes used for the test, or used in device operation

of course - again though, comparitive speed tests are better than a poke in
the eye



| Consider that many flash memory cards/USB drives/etc using
| current technology are rated around 30MB/s read speed, and
| yet many PCs can't get 30MB/s in some uses or tests, over
| USB, even if a much faster device like a good modern hard
| drive was connected via external enclosure instead of a
| flash drive. Clearly this means the bottleneck on a good
| spec'd flash drive is often elsewhere.


comparisons are pretty much the only useful tests a consumer can do

k