[SOLVED] conclusion: dd can never burn a bootable windows7 installation usbstick from win7 iso image!
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sync writes any data buffered in memory out to disk. dd is a low level utility to write byte for byte the source to the destination so as far as I know it isn't buffered.
The USB drive will not be bootable. You might try writing the to file first then try Rufus.
If the objective is to have a USB stick that you can boot into the INSTALL for Win7 you might try E2B or Ventoy (see signature for links). They do not require burning the ISO, just copying the ISO as a file to the stick you have prepared to boot E2B or Ventoy. (See instructions on the web sites.)
Both can boot Windows installs directly form the ISO.
Note: your USB drive must be BIGGER than you expect. I would use at least an 8G drive, but even 64G are really very inexpensive these days.
My usbstick is 16GB. Why you think it is 4G ? because of bs=4M ?
I have no idea what bs=4M for.. i just know it is Buffer size=4M.. something to do with data transfer package size.
sync writes any data buffered in memory out to disk. dd is a low level utility to write byte for byte the source to the destination so as far as I know it isn't buffered.
The USB drive will not be bootable. You might try writing the to file first then try Rufus.
I heard dd is very powerful, hence i tried to learn to use basic linux command without needing extra software.. Isn't all linux people like to use basic cli tool ? :=)
If the objective is to have a USB stick that you can boot into the INSTALL for Win7 you might try E2B or Ventoy (see signature for links). They do not require burning the ISO, just copying the ISO as a file to the stick you have prepared to boot E2B or Ventoy. (See instructions on the web sites.)
Both can boot Windows installs directly form the ISO.
Note: your USB drive must be BIGGER than you expect. I would use at least an 8G drive, but even 64G are really very inexpensive these days.
I have 16GB, it is more than enough for windows iso.
sync writes any data buffered in memory out to disk. dd is a low level utility to write byte for byte the source to the destination so as far as I know it isn't buffered.
Writes by dd are buffered unless you use the "oflag=direct" option. This becomes really apparent if you are writing to a slow USB stick and have a lot of memory available for buffering. The transfer runs really fast until you run out of free memory, then the transfer slows to the actual rate of the device, and finally there is a huge delay at the end when dd issues the close() call for the device and all that buffered data needs to be flushed out.
I have spent hours on trying to use dd to burn a workable win installation usbstick..
And after much reading, DD is a junk when it come to burn iso image to usb stick. it will never work.
use woeusb instead.. fast and easy
BUT i have tried
sudo woeusb --target-filesystem NTFS --device /path/to/your.iso /dev/sdX
and
sudo woeusb --device /path/to/your.iso /dev/sdX
Both does not able to create a bootable win installation usbstick as well.
I have spent hours on trying to use dd to burn a workable win installation usbstick..
And after much reading, DD is a junk when it come to burn iso image to usb stick. it will never work.
It depends and requires some context.
If the ISO file you download is an isohybrid then yes dd will work. Most ISO distribution files are hybrids so using dd will work and I use it 99% of the time.
The ISO file you created is an exact copy of the Windows DVD and can not boot from a USB drive which is why you need another utility.
If the ISO file you download is an isohybrid then yes dd will work. Most ISO distribution files are hybrids so using dd will work and I use it 99% of the time.
The ISO file you created is an exact copy of the Windows DVD and can not boot from a USB drive which is why you need another utility.
Ok.. got it now.. dd is good for isohybrid (which i don't know how to identify) and it is good for cloning storage of same size.
dd works just fine. It is a bitstream duplicator. You will have to start with a bootable image if you want a bootable stick. And microsoft does everything it's own little proprietary special way.
dd works just fine. It is a bitstream duplicator. You will have to start with a bootable image if you want a bootable stick. And microsoft does everything it's own little proprietary special way.
No, both won't do.
1stly , i don't use win10, only gonna use win7. and i have win7 iso already that proven work (used long time ago while i only use windows os), hence this is not applicable.
url 2, this is weird.. running dd on windows computer ??
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