Cannot Access Some Partitions In External HD From Windows 7
Sep 24, 2010
I'm having a problem not being able to access 2 out of 3 partitions in an external HD.
Samsung HD753LJ (USB) 700GB
Partition 1: 200 GB / NTFS
Partition 2: 200 GB / NTFS
Partition 3: 300 GB / NTFS
I once had a dual-boot Windows XP Professional SP3 and Windows 7 Professional. Partition 1 could be accessed from both OS, but Windows 7 could not and still cannot 'see' Partitions 2 and 3. While it was still a dual-boot, switching back and forth between the systems was the only way I could access the data in Partitions 2&3 from Windows XP. Now that I have a clean install of Windows 7 only, (stupid me to have forgotten this problem) I cannot access the files at all. I have tried restarting the system, reinstalling the HD driver, replugging the HD, and the problem still persists. What I have managed so far:
> Under 'Device Manager'
>> No warning. All drivers are updated.
> Under 'My Computer'
>> Only Partition 1 is listed and accessible
> Under 'Computer Management' > 'Disk Management'
>> All three partitions are in the disk's table. The 2nd and 3rd partitions are listed with blue bars, total space allocated and no other information. An attempt to get Properties or assign drive letters produces an error message "... Disk Managaement control view is not up-to-date ... ".
> Under 'partdisk'
>> 'list disk' shows correctly sized Disk at 700 GB
>> 'list volume' shows only up to Partition 1 of the external HD.
>> After selecting the external HD, 'list partition' shows all 3 partitions with correct sizes and offsets.
> With MiniTool Partition Wizard Home Edition
Disk 1_______
G: Partition 1
*: Partition 2
*: Partition 3
>> All 3 partitions can be explored (whew ...)
>> The two 'missing' partitions were not hidden.
>> However, when assigning the drive letters to the partitions, the drive letters only stay in front of the partitions' names until I clicked Apply. After which, the asterisks came back again. (I haven't found any way to assign the drive letter in Partition Wizard Bootable CD
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Jul 29, 2011
My external hard drives partitions are hidden in windows 7
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So I go to do the normal F8, repair my computer step and see that the repair my computer function doesn't work. Ok let me boot to windows 7 disk and select the repair option and use that for factory restore. Again nothing, usually Dell datasafe options will allow me to do this. I then notice that the recovery partition was not showing up.
I called her and asked and it seems my sisters so called boyfriends fancies himself a "computer expert" and last time they were having problems decided to just reinstall windows which I assume some how lost the connection to the recovery partition.
I installed EaseUS free partition manager and see that the Recovery partition is still there just not accessible. Is there a way I can make this partition bootable again so that i can assess it from the repair menu and possible repair this back to factory?
also if I go like im going to reinstall windows when it says in what partition you want to install windows I can also see the recovery partition.
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Edit: TestDisk Results: No Recoverable Partition Found.Also noticed file system now says RAW.
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Let me now describe what happens when I try certain actions:
- When I try to copy large files (10 or more GB) I get an error that destination is no longer visible. External drives disappear from My Computer and I can't do safe remove. But when I copy files using programs FastCopy or TeraCopy everything copies well and drives do not disappear.
- When I try to do Windows Backup and encrypt them using BitLocker drives also disappear, and are not visible within OS.
There is a difference between external hard with USB 3.0 port and the one with 2.0 port:
- When one with 3.0 disappears after described actions I can't see it from Device Manager, I can see it only after windows reboot. USB 3.0 disk connects to one USB 3.0 port on laptop.
- When one with 2.0 port disappears I can see it from Device Manager, and I only have to unplug it, and plug it in again to see it. USB 2.0 disk connects to 2 USB 2.0 ports on laptop.
Common to both disks is that when then disappear from My computer the diode on the external disk cases are still flashing, what probably means that they have some power. Both disk are formated to NTFS, and Allocation unit size is set to: Default. Their removal policy is set to: Better performance (default). On laptop I only have Windows, Office and Asus drivers. Antivirus is: MSE.
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