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Accepted
Antonius Bloch
Asked: 2011-01-13 10:29:32 +0800 CST

Get exact size in bytes of a disk & partitions in windows

  • 772

I'm using dd (under cygwin) to copy a shadow image of a disk in windows. Shadow copy will only give me a partion, so what I am doing is:

1) using dd to grab the disk header (32k on Win2003)
2) using dd to copy the shadow partition
3) using dd to copy the end of of the disk (8 meg reserved on Win2003)
4) stitch them all together and boot on KVM

I need the exact size of all the partitions and non partitioned space on this windows drive. Unfortunately most windows disk tools seem to fudge the numbers a bit, or at least give me a different size than Linux does. I could guess like this 32k + partition size + 8M, but I want to double check. If I make a mistake I could lose data.

This is on a remote & live Windows 2003 server so no offline solutions will be helpful. Latest cygwin is installed.

windows windows-server-2003 disk-image diskmanagement

3 Answers

  1. Best Answer

    Have you tried checking WMI for accurate values? You can query common aliases through the wmic command:

    C:\>wmic partition get name,bootable,size,type
C:\>wmic diskdrive get size,status,TotalCylinders,TotalSectors,SCSIPort,SCSITargetId,model
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  2. wmic diskdrive : for physical size
    wmic logicaldisk : for you know

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  3. Not exactly an answer, but you could use disk2vhd, then convert it for KVM using qemu-img convert -f vpc -O qcow server.vhd server.qcow command.

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