[fedora-arm] A Quick Linux Question For Anyone Out There

Jonathan Chiappetta jchiappetta at learn.senecac.on.ca
Wed Feb 15 00:16:15 UTC 2012


I need your help!

So it turns out dd.exe on Windows in SYNC mode can write to block devices (which I didn't even think it had) 
fairly faster compared to Linux. Windows can achieve a little over 1 M/s write speed while Linux only gets 
300 K/s. I'm not certain but I think Linux can get faster writes speeds in ASYNC copy mode, however, 
this isn't useful for the Installer application as it wont get any feedback regarding the current copy. So my 
question for all of you is, if I'm dd'ing data to /dev/sdc in ASYNC mode for example, is there anyway in Linux 
to call some sort of method or application to get either how much data has been copied or how much data 
is left to copy? 


I'm really having a hard time believing that the creators of Linux failed to implement a lower-level method 
in the Kernel or Library somewhere to at least query how much data is left to sync for a particular buffer... 
that would be very frustrating if true as it such a simple, needed method to write for any asynchronous 
application!


Thanks for your time,
Jon Chiappetta


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