Qemu /dev/zero

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Nabendu Contact options for registered users 's Avatar (by Gravatar) posted on
May 18, 2008, 8:04 am
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Hi all,

I was emulating kernel image and rootfs using qemu.

qemu -kernel vmlinuz-2.6.22.17-0.1-default -initrd test.cpio.gz /dev/
zero
as mentioned in ramfs-rotfs documentation.
every thing works fine. But i have some confusion here...

What is the role of  /dev/zero.

anyone please explain..

Regards,
Nabendu

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Jerry McBride Contact options for registered users 's Avatar (by Gravatar) posted on
May 19, 2008, 11:36 pm
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Re: Qemu /dev/zero

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Search at google with: "what is /dev/zero for" turned up:

Results 1 - 10 of about 400,000 for what is /dev/zero for. (0.29 seconds)


Best result is: http://en.wikipedia.org/wiki//dev/zero


YOU could have done the same...




--

Jerry McBride (jmcbride@mail-on.us)

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Nabendu Contact options for registered users 's Avatar (by Gravatar) posted on
May 20, 2008, 2:24 pm
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Re: Qemu /dev/zero
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I think i wanted to know "what is the role of /dev/zero here?"..in the
qemu command..

qemu -kernel vmlinuz-2.6.22.17-0.1-default -initrd test.cpio.gz /dev/
zero

when i am not using /dev/zero qemu is executing and shutting down the
run window..why thats so..

Regards,
Nabendu

Sebastian Contact options for registered users 's Avatar (by Gravatar) posted on
May 21, 2008, 3:02 pm
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Re: Qemu /dev/zero
Nabendu schrieb:

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 >
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Qemu requires you to specify a hard disk to boot from. Obviously, if you
load a kernel directly and have your root file system on a ramdisk, you
don't need it. But you still have to specify it: Your emulated hda is
/dev/zero - nothing.

Another approach would be to have a command line like:

qemu -kernel vmlinux-2.6 -initrd test.cpio.gz -hda /dev/zero

You could have read this in the Qemu documentation, too. It is mentioned
there.

Regards,
Sebastian

Nabendu Contact options for registered users 's Avatar (by Gravatar) posted on
May 21, 2008, 4:37 pm
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Re: Qemu /dev/zero
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Thanks a lot.I should have read that.

Regards,
Nabendu

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