Time to write the image

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1

Hi *,

when writing the image file to the SD card, is it normal that it takes around 30 minutes?
I use sudo xz -kdcv Angstrom-image…xz > /dev/disk1
and I can observe the the xz process consumes almost no CPU or Memory (on Mac OS X 10.7). Is there a way to speed things up? I could not find the sdcard device as outlined in the how tos, at least after I unmounted /dev/disk1 it works, but it is normal to be that slow?

Markus

2

Hi *,

when writing the image file to the SD card, is it normal that it takes around 30 minutes?

45 minutes on my macs, there's something wonky with the SD drivers in OSX

I use sudo xz -kdcv Angstrom-image...xz > /dev/disk1
and I can observe the the xz process consumes almost no CPU or Memory (on Mac OS X 10.7). Is there a way to speed things up? I could not find the sdcard device as outlined in the how tos, at least after I unmounted /dev/disk1 it works, but it is normal to be that slow?

It's indeed really slow.

regards,

Koen

3

It also depends on the SD card speed, there is a great difference between a class 10 and a class 2.
Class 10 is really fast.

Regards,
Daniel

4

Not always.. :wink:

http://www.sakoman.com/OMAP/microsd-card-perfomance-test-results.html

Regards,

5

I just discovered that using an USB card reader instead of the SD card slot on Mac OS X brings down the time to 12 minutes. I can live with that.
Markus

2012/3/2 Robert Nelson <robertcnelson@gmail.com>