Re: Creating file-backed VBDs

[haad <haaaad%gmail.com@localhost>]

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Hi

As I know netbsd vnd doesn't correctly support sparse files.
You have to use dd without seek parameter.


Regards
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Adam Hamsik
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Mike Sun wrote:
> This may seem like a stupid question but how does one go about create
> a VBD that can be used with the netbsd-INSTALL-XEN3_DOMU kernels for
> installation?
> 
> I have created a disk image with "dd if=/dev/zero of=nbsd-disk bs=1k
> seek=2048k count=1" and am able to start and enter the NetBSD
> installation program through the DOMU kernel, but when after going
> through the partition and disklabel steps, I get this error as it
> attempts to create the filesystem:
> 
> "disklabel: Can't read master boot record 0: Input/output error"
> "disklabel: /dev/rxbd0d: Input/output error"
> 
> My xen config file uses this line:
> disk = [ 'file:/home/msun/nbsd-disk,0x1,w' ]
> 
> Do I need to fdisk the file disk image?  Or manually disklabel and
> create a filesystem on it?
> 
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