Disk - Clean and Clean All with Diskpart Command

hello on my pc I created two partitions one for my windows 8.1 C drive 150 gb and another to store all my data D drive 350 gb,I accidentally shut down the pc directly from power supply now my pc is not booting and when i try to reinstall windows no drives are detected, after searching a lot I believe my MBR has become corrupted, I want to follow these steps you have written to delete my corrupted mbr and reinstall Windows 8.1 or windows 7 fresh into my 150 gb c drive while not losing my D drive data, so if I use the clean command can I individually clean only my c drive or will both drives be cleaned.

Hi and thanks for the tutorial. I just did a 'clean all' on a 1TB internal HDD. And then when I went to device manager/disk management in order to assign the hdd's unallocated 1tb space I was given this option:

Use the following partition style:
MBR
GPT

Note GTP is recommended for disks larger than 2TB [mine is 1TB as I said], disks used on Itanuim-based PCs and wont be recognized by prev. versions of Win

I think before I did the CLEAN ALL it was MBR, not GPT, but I am not sure. As I said, it is an internal SATA2 3gb/s HDD, which used to be my main HDD partitioned with OS partitions and storage partitions. Now an SSD is my OS drive and the 1tb HDD in question is inserted in the 2nd slot in my notebook to be used only as storage. That's pretty much the full story. So which one of the 2 options to choose? It makes sense to be the MBR option but it never hurts to ask.

PS
Sorry if I am repeating a question already asked, but I could not find the answer so far.

Thanks for your reply! I am not sure what you mean in this context when u say 'installation disk'. As I said my configuration is the following - Win7 Pro x64 on a notebook PC with 2 hdd/ssd slots. In one slot I have an SSD where my OS is and in the 2nd slot I have the internal HDD on which I just performed a 'clean all'. The HDD is only going to be used for storage. There is not going to be any operating systems installed on it. I hope that makes it clearer now. Sorry if there was any confusion.

1. That said, what is the answer now? MBR or GPT for the HDD when 'device manager/disk management' asks me the following

Use the following partition style:
MBR
GPT

Note GTP is recommended for disks larger than 2TB [mine is 1TB as I said], disks used on Itanuim-based PCs and wont be recognized by prev. versions of Win

2. Does it matter which OS we are talking about in this context? In other words, is the answer to question #1 the same for Win7, Win8, Win8.1 and say Win10?

Thanks in advance! :)

OK, the internal HDD in question is, as I already said in my initial post, not the one where any OS is going to be installed ever. And it is 1TB in size. It is only an internal hdd for storage. Those are all the prerequisites.

For all versions of Windows that I ever use [Win7, Win8 and Win10, etc] I am only going to use that internal HDD for storage and not for installing OS onto. I repeat, it is an internal HDD, cos my notebook has 2 slots. So with that in mind, I thought it should be the same choice in all Windows editions, but it surprises me now to see you're saying that in Win7 I should have the hdd as MBR and in Win8 in GPT. I mean, after all... it's the same internal hdd we are talking about here, same size and same use it will have. Why would I have it MBR in Win7 and GPT in Win8. That is what you are saying as far as I understand.

Thanks again :)

Thank you for the reply but from all I wrote [and asked] one would expect a deeper explanation from you as to why you recommend MBR in Win7 and GPT in Win 8. After my little research I figured that there is a different way at looking at things. GPT is newer than MBR, and if GPT should ever be used on a partition meant for an OS, then Windows can only boot from GPT on UEFI-based computers running 64-bit versions of Windows 8.1, 8, 7, Vista, and corresponding server versions. All versions of Windows 8.1, 8, 7, and Vista can read GPT drives and use them for data, but, as mentioned above only the 64-bit versions on uefi based pcs can boot from gpt drives.

Bottom line for me [correct me if I am wrong] is that if the hdd/sdd in question is not going to be one to boot from, but just used for storage, then only the size would determine if one should use MBR or GPT. MBR is for drives up to 2 or 2.2TB, for larger one would use GPT. Which then makes one ask the question why not use GPT anyway, since it supports bigger and smaller than 2/2.2TB. Shouldn't matter too much I guess. What matters though is whether or not to use GPT or MBR on an OS drive. Obviously GPT has advantages, but there's also some requirements from the PC/system to be met if GPT is to be used.