QUESTION :
I’ve plugged an external hard disk on my computers. The device has been detected, but isn’t shown on explorer. It is the same situation on both windows 7 and windows 10.
Detected / installed because it was shown in control panel > Devices and Printers. Also because I’ve found it using the list disk command line and it should be the Disk 1 :
Microsoft DiskPart version 10.0.10586
Copyright (C) 1999-2013 Microsoft Corporation.
On computer: TOSHIBA-MINCONG
DISKPART> list disk
Disk ### Status Size Free Dyn Gpt
-------- ------------- ------- ------- --- ---
Disk 0 Online 238 GB 0 B *
Disk 1 Online 465 GB 127 MB *
Unrecognized because it seems that the Partition 2 has unknown file system type. So it cannot be recognized by windows.
DISKPART> select disk 1
Disk 1 is now the selected disk.
DISKPART> list partition
Partition ### Type Size Offset
------------- ---------------- ------- -------
Partition 1 System 200 MB 20 KB
Partition 2 Unknown 465 GB 200 MB
Can somebody help me to resolve this problem without clean the data in the hard disk ?
Update
I tested the hard disk format type on OSX. And its type Apple_HFS as you can see at /dev/disk2.
Air-de-xx:~ xx$ diskutil list
/dev/disk0 (internal, physical):
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *121.3 GB disk0
1: EFI EFI 209.7 MB disk0s1
2: Apple_CoreStorage Macintosh HD 120.5 GB disk0s2
3: Apple_Boot Recovery HD 650.0 MB disk0s3
/dev/disk1 (internal, virtual):
#: TYPE NAME SIZE IDENTIFIER
0: Apple_HFS Macintosh HD +120.1 GB disk1
Logical Volume on disk0s2
440DB97F-xxxx-xxxx-xxxx-19AEAC28E415
Unencrypted
/dev/disk2 (external, physical):
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *500.1 GB disk2
1: EFI EFI 209.7 MB disk2s1
2: Apple_HFS MEMUP 499.8 GB disk2s2
ANSWER :
What was the hard drive used for previously? Make sure the hard drive is formatted in NTFS, Fat32, or eXFat so that it is readable by Windows. Windows can’t read file systems that are formatted for Mac or Linux. It may also not be mounted.
Guide to mount drives: http://windows.microsoft.com/en-us/windows/mount-dismount-drive#1TC=windows-7
Try changing the external hard-disk case or plug it in through another external USB hard-disk connector (and not through its own case circuit), to make sure if the hard-disk case circuit is still working and not gone out of order.
Please check the disk manager. There are multiple ways to access it, and depending on the version of Windows that you have, the steps might be slightly different
On most windows
1. Open Windows Explorer > Right-click My Computer/or This PC > Manage
Or WindowsKey + R > Type diskmgmt.msc
2. Locate the disk partition in question > Right-click “Change Drive Letter and Paths”
3. Make sure there is a drive letter associated to the disk, or click Add to create one
4. See if you can access the disk after a disk letter had been established
Here is a quick example to Win7 steps
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