dd for Windows

[pgsnow]

when I click on the dd.exe a dos window comes up fast and then it disappears. Has anyone have this problem as well?

[pgsnow]

Maybe this is a stupid question but please i need help. I downloaded the binary from the website click on the exe and a dos window comes up for a split second and goes away. I then try to open a command prompt again and type the dd command and get the message that dd is an unreconizable command. Someone please help. How do you get this to work in Windows. I know how to in linux.

[Tornado]

you need to opem a command prompt in windows first!

 

start / run / cmd "enter"

 

then type the dd command, this one works the best

 

dd bs=1048576 if=tiger-x86-flat.img of=\\.\PhysicalDrive#

- where # is the number of the drive you want to put the image on, you can find this from the disk management utility. start / my computer (right click) select manage from the list, then choose disk management and look for the drive you want to put the install on, you will see that windows starts at 0 and moves up from there.

 

make sure you put the dd files and the image files in the same directory on a hard drive and navigate to that location from the command prompt before you execute the dd command.

 

wow that is confusing...

 

Tornado

[susheelvarma]

Hi,

 

dd for windows just takes too long to rawwrite to an external hdd partition. Is this normal or am I doing something wrong? Is there a simpler way to do this. The command I am using is:

 

dd if=tiger-x86-flat.img of=\\?\Device\Harddisk1\Partition1 bs=512

 

where harddisk1\Partition1 is the external usb hdd the partition size is 7 GB and the image is, i guess the VMware image.

 

Please help, if you can.

 

Keep up the good work guys.

[pancake]

Hi,

 

dd for windows just takes too long to rawwrite to an external hdd partition. Is this normal or am I doing something wrong? Is there a simpler way to do this. The command I am using is:

 

dd if=tiger-x86-flat.img of=\\?\Device\Harddisk1\Partition1 bs=512

 

where harddisk1\Partition1 is the external usb hdd the partition size is 7 GB and the image is, i guess  the VMware image.

 

Please help, if you can.

 

Keep up the good work guys.

<{POST_SNAPBACK}>

 

 

dunno what the bs=512 on the end means but i never put it when i dd

 

dd bs=1048576 if=c:\image\tiger-x86-flat.img of=\\?\Device\Harddisk1\Partition0

 

is what i use , takes 4 - 5 minutes

[Elv13]

and worked?

[Tornado]

bs=512 is WRONG! the bs stands for block size, that is why it is taking so long, and it obviously will not work. Use bs=1048576 that will increase your block size, it when dd is finished, your result should be 63xx or something like that.

[susheelvarma]

Hey, thanks guys. I really appreciate it.

 

Note the following is from a Systems Guru, I had a chance to talk to him today and asked him the exact same question, and guess what he gave the exact same answer. So that just means, you guys are really good. Thanks again for all your help.

 

He(The Guru) also had this to say:

Yes, bs does stand for block size and if bs is set to 512 it does a rawwrite at 512bytes block size and that is not what we want. Setting it at 1M or higher settings will allows it to write faster, but sometimes accuracy is affected. He also mentioned that the default block size in dd for windows is set to 512b. setting it to 1G should also work but there wont be any performance increase as will windows will still end up doing a buffer swap, hence resulting in slower speeds. He said to contact John Newbigin @ Swinburne Uni or visit his site for more details.

 

Hope this helps anyone in need.

 

Cheers