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I have a USB device /dev/sda1.I use raw to bound it to /dev/raw/raw1.I can use fread to read from it,but I cannot use fwrite to write to it.
If i use system call read or write,it gives me the message:invalid argument.Why?
Thank you very much!
Raw I/O is deprecated - why are you not using O_DIRECT ?.
As for your problem, maybe your blksize isn't a multiple of sector size as the manpage suggests for dd usage. Using deprecated interfaces you are largely "on your own".
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