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I have 3TB HD installed in my pc. I dont know how its converted to "EFI system partition" !! Can I return it back to normal patition without formating or cleaning it?
This picture shows that disk 0 is completly an EFI partition
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I have 3TB HD installed in my pc. I dont know how its converted to "EFI system partition" !! Can I return it back to normal patition without formating or cleaning it?
This picture shows that disk 0 is completly an EFI partition
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It may be as simple as changing the partition type back to “Microsoft Basic data partition” (ID EBD0A0A2-B9E5-4433-87C0-68B6B72699C7
). This could be accomplished easily with a number of partition tools on Linux:
fdisk
(newer GPT-capable versions)fdisk -l
fdisk /dev/sdX
, where sdX
is the correct disk as identified in step 1t
↵, L
↵, enter code for “Microsoft basic data” from list (11
on my machine), ↵ (nb: because there is only a single partition, we won’t be asked which partition to use)w
↵gdisk
gdisk -l /dev/sda
, gdisk -l /dev/sdb
, ... until you find the diskgdisk /dev/sdX
, where sdX
is the correct disk as identified in step 1t
↵, L
↵, enter code for “Microsoft basic data” (0700
on my machine), ↵ (nb: because there is only a single partition, we won’t be asked which partition to use)w
↵, y
↵parted
parted -l
parted /dev/sdX
, where sdX
is the correct disk as identified in step 1toggle 1 msftdata
↵ (nb: changes take effect immediately)quit
↵You could also use the file
command to try and determine if it’s still NTFS:
file -s /dev/sdX1
All of the above needs to be run as root.
If you don’t have a live-bootable Linux available, I recommend using a lightweight image like Gentoo’s minimal install (boots directly to terminal, recommended) or Puppy Linux.
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I wonder why nobody mentioned of the Windows-builtin diskpart
when talking about changing the partition type GUID:
select disk 0
select partition 1 [Could be partition 2 because there is a (hidden) MSR partition before it]
set id=EBD0A0A2-B9E5-4433-87C0-68B6B72699C7
(https://en.wikipedia.org/wiki/GUID_Partition_Table#Partition_type_GUIDs)
or
set id=7
if it is an MBR disk.
(https://en.wikipedia.org/wiki/Partition_type#List_of_partition_IDs)
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You must use a partition recovery software. I would suggest Test Disk, which is free and reliable.
Also, this answer may be useful for you.
Was it a single partition before? Do you know what kind of filesystem (FAT32, NTFS, ...) it is? Also: Stuff like that doesn’t happen by itself. Did you try to install an operating system? – Daniel B – 2016-03-19T11:11:09.367
yes it was single NTFS partiton. No i didnt try to install any OS. Its really a strange thing !! – drhoom – 2016-03-19T13:40:01.073