Change descriptor file content within big vmdk

[twoez]

I want to convert a sata disk to a scsi disk, but to do that I read that I need to change the adapter to "lsilogic". To do that I can use "vi" or "nano" to edit a .vdmk to change the line containing the adapter type. But my .vmdk's are so big (100gb) that I can not even open the .vdmk.

How can I change the adapter type? Is there another way to edit these lines? Or is there some tool to convert from sata to scsi?

[continuum]

You do NOT need to edit the embedded descriptor.
Instead you have to edit the vmx-file.
Now you will have an entry like

sata0.present = "TRUE"

sata0:0.present = "TRUE"

sata0:0.fileName = "big-disk.vmdk"

To change that to scsiyou will need

scsi0.present = "TRUE"

scsi0:0.present = "TRUE"

scsi0:0.fileName = "big-disk.vmdk"

Make sure that you do NOT specify a parameter twice.

[continuum]

Also read

VMDK-Handbook-Basics
to learn how to safely edit embedded descriptorfiles.

[twoez]

Thanks for your response.

I already tried that, but my Windows 10 guest does no longer boot and shows a BSOD with the message: "Inaccessible boot device" and enters a bootloop.

[continuum]

A BSOD is expected behaviiour if you change the devicetype for the bootdisk of an existing Windows-disk.
Why do you want to change the bootdevice ?
You can try to use VMware Converter with the "configure machine" option to enable the SCSI-driver in your existing Win10 guest.
Or set start-type for LSI-SAS to 0 in regedit.