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Full Discussion: SD Card Throughput exceeds - On using "dd" command
Special Forums Hardware Filesystems, Disks and Memory SD Card Throughput exceeds - On using "dd" command Post 302305612 by pludi on Thursday 9th of April 2009 10:47:01 AM
Old 04-09-2009
What do you mean by "dd's own representation of the data"? The command he gave does just one thing: copy 20480*512 bytes (= 10485760 bytes = 10 MB) from /dev/zero (which always returns the \0 byte as fast as the processor can) to a file on the SD card. And AFAIK using dd to measure throughput is quite common, as it doesn't do any other stuff to the data.

It would be interesting what the numbers would be if you'd transfer 100 or 1000/1024 MB a few times.
 

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LEARN ABOUT DEBIAN

mounting

mounting(7)						 Miscellaneous Information Manual					       mounting(7)

NAME

       mounting - event signalling that a filesystem is mounting

SYNOPSIS

       mounting DEVICE=DEVICE MOUNTPOINT=MOUNTPOINT TYPE=TYPE OPTIONS=OPTIONS [ENV]...

DESCRIPTION

       The  mounting  event is generated by the mountall(8) daemon when it is about to mount a filesystem.  mountall(8) will wait for all services
       started by this event to be running, all tasks started by this event to have finished and all jobs stopped by  this  event  to  be  stopped
       before proceeding with mounting the filesystem.

       The DEVICE, MOUNTPOINT, TYPE and OPTIONS environment variables contain the values of the fstab(5) fields for this mountpoint.

EXAMPLE

       A tool that should be run before mounting the /var filesystem might use:

	      start on mounting MOUNTPOINT=/var
	      task

SEE ALSO

       mounted(7) virtual-filesystems(7) local-filesystems(7) remote-filesystems(7) all-swaps(7) filesystem(7)

mountall							    2009-12-21							       mounting(7)
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