Windows 10: Cannot boot from SSD / GPT

I have just upgraded the motherboard on my computer, and installed a new SSD disk. Used Aomei to clone the old system to the new disk, which seemed to work ok, but when I reformatted the old system disk to use it for data, system refuse to boot with error message "A required device isn't connected or can't be accessed"I have tried a repair, but since the disk is GPT, this does not work, the same is the case using commands from the command line.I recon this is a problem with the boot environment, and that there might have been some boot information on the old system drive, but this is pure gues

:)

 

Cannot convert GPT to MBR.

Hi Michael,



I suggest you to follow the below steps and check if it helps.

This method you have to backup all your data and delete all partitions and volumes. Then use the
DISKPART command.

• Open command prompt and type in DISKPART and press Enter
• Then type in list disk (Note down the number of disk you want to convert to GPT)
• Then type in select disk number of disk
• Finally type in convert gpt.

Hope the information helps. Do reply if you need further assistance.

 

GPT vs MBR for SSD OS Disk ? (win7 install)

So

I've got a new PC coming and this time it's the first time I will be using UEFI, i have read all the big stuff but I don't have the hardware yet so It's still kind of half baked but I'll do dig deep into it once I start building in the coming days.

I've read the win7 install guides, MS GPT FAQs (not fully yet), etc,

But I wish to know if:

I can use UEFI as an upgraded bios without having to use GPT disk format?

GPT disks can have any sort of partition cloning for full operational OS backup ?

Will GPT format improve performance on SDD or improve reliability in terms of data integrity or error rate?

When isntalling win7 with MBR but using UEFI, will it work normally without needing to uefi-boot the window7 install?


If I cannot backup my OS in a 100% clone that will boot normally when recovered, i will probably not use GPT, that shit is a step backward.

 

GPT vs MBR for SSD OS Disk ? (win7 install)

I do not understand.

GPT is designed almost exclusively to allow huge arrays. The genesis of windows useable GPT drives goes back to Windows XP x64.

UEFI does not require GPT to boot. UEFI is the BIOS, functionally. It runs before any disk is touched.

As far as booting, stick with MBR on your SSD. There is no 2TB+ SSD on the market, and you're unlikely to have a RAID 0 array that large. Windows 7 defaults to MBR, for so many good reasons it isn't funny.


I haven't the slightest idea about where you linked UEFI and GPT. If you've got a large array as your boot drive you might have to cross this bridge, but given the difficulty I'd stay as far away from it as possible. MBR isn't old, it's still the primary windows drive formatting for a darn good reason.