When importing VMs from Player/Workstation to ESXi sometimes occurr that original vmdk files are separated into multiple vmdks.
This is because vmdks of a fixed small size are sometimes choosen by user creating guest VM in VMware Player/Workstation due to their better transportability respect to a single vmdk of a bigger size.
To merge multiple vmdks into a single vmdk file we need to use Virtual Disk Manager wich comes with VMware Workstation or can be downloaded separately.
If you have VMware Workstation you can find Virtual Disk Manager under:
C:\Program Files\VMware\VMware Workstation
or you can download it as part of vSphere 5.0 Virtual Disk Development Kit.
So, let's merge our vmdks using command promtp and calling for vmware-vdiskmanager.exe.
This is the synthax:
vmware-vdiskmanager.exe -r first.vmdk -t 0 merged.vmdk
0 — to create a growable virtual disk contained in a single virtual disk file
1 — to create a growable virtual disk split into 2GB files
2 — to create a preallocated virtual disk contained in a single virtual disk file
3 — to create a preallocated virtual disk split into 2GB files
Here you find more informations about Virtual Disk Manager options while the full manual can be found here.
That's all, happy merging!!