How to transfer Windows 7 instance to iSCSI target?

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It is straight forward to install a fresh new Windows 7 instance on iSCSI target. However, there few tricks to migrate a Windows 7 instance to iSCSI target. Migrating an existing Windows 7 instance is a time consuming process especially for large partition size. Doing it right will save lot of time.
If a Windows 7 instance has larger partition size, e.g.: Few hundred Giga bytes or Tera bytes, migrate this instance will spend lot of time transfer Windows 7 instance to iSCSI target. Before start migrate the instance, try shrink or extend the volume size suitable for usage in near future. Use Extend Volume… and Shrink Volume… function in Disk Management to perform the task:
he Windows 7 is ready to image and transfer to iSCSI target. Boot into Linux and use command line utilities like fdisk and dd to image the Windows 7 partition.
the Windows 7 is ready to image and transfer to iSCSI target. Boot into Linux and use command line utilities like fdisk and dd to image the Windows 7 partition.

First, decide the partition size:

# fdisk -lu /dev/sdb


Disk /dev/sdb: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders, total 1953525168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0xdf70df70

Device Boot Start End Blocks Id System
/dev/sdb1 * 2099200 309299199 153600000 7 HPFS/NTFS
/dev/sdb2 718899200 1953521663 617311232 f W95 Ext'd (LBA)
/dev/sdb5 718901248 1333301247 307200000 7 HPFS/NTFS
/dev/sdb6 1333303296 1435703295 51200000 7 HPFS/NTFS
/dev/sdb7 1435705344 1953521663 258908160 7 HPFS/NTFS


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Windows 7 disk image to iSCSI target