2TB HDD not detected in Windows 7 or BIOS

August 6, 2011 at 12:11:52
Specs: Windows 7 64bit, AMD Phenom II/ 4GB DDR3
Hi All,
I will try to keep this brief.....
I have installed 3 HDDs into a friends machine. 2 x 1TB Samsung drives and 1 x 2TB Samsung drive.
The 2 x 1TB drives have been detected in the BIOS and under management in Windows 7 64bit, and they are working fine.
The 2TB drive is a completely seperate issue. This drive is not being detected under either the BIOS or in Windows.
I believe that the cause of this is the fact that the 2TB drive is an external drive (ie I have removed it from the caddy to install it into the case.) I am sure I have probably missed something simple, but I would appreciate any feedback/ideas you can give me.

Would there be anything installed on the HDD that would prevent it from being recognised via the new SATA connection?? I have read something online that their may be a 'boot chip' in the HDD caddy? Is this true and if so what do I do to disable this?

See More: 2TB HDD not detected in Windows 7 or BIOS

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August 6, 2011 at 12:24:30
Try gparted live cd to format/initialise it

A thank you would be nice, if I have helped.

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August 6, 2011 at 12:43:50
1. Thankyou for getting back to me so quickly I appreciate it.
2. The drive is not detected in the BIOS or Disk Management, wouldn't I have to resolve that issue before I can format??

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August 6, 2011 at 13:17:36
No, download the gparted live cd http://gparted.sourceforge.net/down...

Burn as an iso, then change the boot order to the cd, it should then show the usb hard drive, plus other drives on your pc.

A thank you would be nice, if I have helped.

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Related Solutions

August 6, 2011 at 14:36:24
The hard drive inside an external hard drive is already software partitioned and formatted using something Windows already recognizes (NTFS in this case) when the drive is new. I'm assuming you haven't messed with that.

When the 2tb drive is in the external enclosure.....

- if it's connected via a USB port, the USB port you plug it into MUST be able to actually supply 500ma (1/2 amp) of current - in some cases you may need to connect it to TWO USB ports on the computer end.

- If it came with an external power adapter that plugs into the external enclosure, you MUST plug that in and that must be powered.

- Some external drive enclosures have a swiitch you must set to ON.

- the external drive may not be detected properly when it's plugged into a port in a USB hub.

When the external drive IS plugged into (a) USB port(s) it can work with properly...

- if the external drive was being detected properly in Window's Computer (and Windows Explorer) previously, but now it doesn't show up there , if you unplugged it while Windows was running WITHOUT clicking on the Safely Remove Hardware icon and choosing to STOP accessing the drive, you may have DAMAGED the data on the drive when you did that. Usually that data damage can be repaired by using cerrtain programs, but until you do that, you will not be able to access the data properly on the hard drive inside the external drive, even if you remove it and connect it internally.
(However, that does not affect whether your bios or Disk Management in Windows detects the drive - it should still be detected,)

Those subjects and more....

Troubleshooting USB device problems including for flash drives, external drives, memory cards.
See Response 1:

When the 2Tb drive is connected internally....

Make sure all the drive connections in the bios Setup are set to Auto detect drives by the method Auto or LBA, or similar. In some cases, if that is set to NONE or similar, the bios will NOT attempt to detect a drive connected to that drive connection.

Check your SATA data cables. The connector on each end should "latch" into the socket on the drive and on the mboard, or on the drive controller card - it should not move when you merely brush your hand against it near the socket - if it does, mere vibration can cause a poor connection of it - use another SATA data cable that does "latch", or tape the connector in place.
(There is a slight projection or bump on one side of the outside of the connector that "latches" it into the socket - it's easily broken off or damaged)

The same thing applies for the SATA power connection.

"The drive is not detected in the BIOS or Disk Management, wouldn't I have to resolve that issue before I can format??"

The hard drive must be detected by the bios, no matter what ! If the bios can't detect the hard drive, then nothing else can detect it.

If the data on the drive has NOT been damaged, when the bios detects the drive, it will probably show up fine in Computer and in Disk Management in Windows.

A rare but possible problem.

Does the 2tb drive spin when it's connected internally ?

Many power supplies these days have more than one +12v output section. If so, more than one +12v max current rating is listed on the power supply's label. One +12v section connects to the mboard, one or more other +12v section(s) connects to the power connectors for the drives and the power connectors for power sockets on video cards.
Sometimes one of the +12v sections has malfunctioned and is not putting out enough voltage, or it's putting out no +12v power at all.

E.g. there was a guy who started a Topic on this site not long ago - he had a brand new mboard, brand new components, and a brand new power supply.
His mboard worked fine but no SATA hard drives at all were being detected by the bios (set to default settings).
I asked him to make sure the two SATA hard drives were spinning - they weren't - he was getting NO +12v power at all to his power connectors for the hard drives.

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August 6, 2011 at 16:41:25
Does the board have more than one SATA controller? If it does, is the 2nd one enabled?

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August 6, 2011 at 17:41:03
A simpler question. Is the drive detected in another computer?

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August 7, 2011 at 19:23:33
ALSO, Does your motherboard recognize hard drives above 1TB???
Does it need a BIOS update to recognize the larger hard drives???
Check your motherboard manufacturer's support pages but get the version number printed on your motherboard in addition to having your model number and your BIOS version from BIOS or post screen and check both the support general pages and the BIOS update pages (will usually list what issues each update solves).
Edit: Sorry, I did mean TB above (correction inserted for easier reading).

You have to be a little bit crazy to keep you from going insane.

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August 7, 2011 at 20:05:21
"ALSO, Does your motherboard recognize hard drives above 1GB???
Does it need a BIOS update to recognize the larger hard drives???"

I assume you meant to say
ALSO, Does your motherboard recognize hard drives above 1TB???

That's not applicable in this case.
If the bios version detects hard drives larger than 137gb manufacturer's size (= 128gb binary size in the bios) , it recognizes the size of any currently available hard drive larger than 137gb manufacturer's size.

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