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Re: [Qemu-devel] [PATCH] qcow2: Metadata preallocation
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From: |
Filip Navara |
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Subject: |
Re: [Qemu-devel] [PATCH] qcow2: Metadata preallocation |
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Date: |
Sun, 16 Aug 2009 14:12:23 +0200 |
On Sun, Aug 16, 2009 at 1:58 PM, Avi Kivity<address@hidden> wrote:
> Older versions of Windows don't support sparse files, and newer ones need a
> flag.
It's supported since Windows 2000, btw.
> It's a good idea to set this flag when opening on Windows.
FILE_ATTRIBUTE_SPARSE_FILE? You can't actually set it when
opening/creating the file, a separate call to
DeviceIoControl/FSCTL_SET_SPARSE is needed.
Best regards,
Filip Navara