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Truecrypt encryption problems

Hello I have a 4TB external USB hard disk I want to encrypt with Truecrypt in Windows 7 64 bits with NTFS, support of store files bigger than 4gb and AES encryption. I tried to encrypt the whole hard drive 4TB in ine partition and after finish the encryption process simply is not visible in Truecrypt window lime encrypted If I go to devices and select there inside Truecrypt and give the password say me is not correct the password or is not Truecryot volume. If I check with Disk Manager say lime RAW data and request me if I want to format the partition, in other words, like if I have an unformatted hard drive. Then I made 2 partitions 4TB/2 making 2TB for each and try ti encrypt same process and si ilar results not recognized by Truecryot or any signal of life inside Disk Manager just lema RAW unformatted space.
   Any suggestion on how to encrypt that hard drive? or Why I'm having that troubles?
Thank you
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coerrace
Asked:
coerrace
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1 Solution
 
Rich RumbleSecurity SamuraiCommented:
You have to initialize a 4tb drive with GPT/GUID for it to be recognized. It sounds like you initialized, or someone else did, it with an MBR...
In the Disk Management console, right-click the MBR drive you want to convert to GPT and then click Convert to GPT Disk. If the drive is not empty or contains partitions, this option is unavailable.
http://msdn.microsoft.com/en-gb/library/windows/hardware/gg463524.aspx

That should solve the issues I think... This disk cannot be read by older os's like 2003/xp once it's a GPT/GUID drive.
-rich
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coerraceAuthor Commented:
Then the process is delete all partitions, then create my 2 partitions from scratch without format and then convert to GPT each partition, then encrypt with Truecrypt again both partitions and that's all?
   Now with GPT disk will be comparible with OSX and Linux too?
Thank you
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Rich RumbleSecurity SamuraiCommented:
Linux will recognize a 4TB GPT drive, and allow TC to mount it. I can't speak to Mac... In linux you have to have CONFIG_LBD enabled in the kernel, not sure what distros or versions of distro's do that or not...

Again not sure about OSX... A GPT also is not a bootable drive, so it would have to be MBR to be bootable for windows, Mac and Linux can use GPT's.
https://wiki.archlinux.org/index.php/GRUB2#GUID_Partition_Table_.28GPT.29_specific_instructions
-rich
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coerraceAuthor Commented:
Hello the hard drive is in GPT mode and still doing the same any other suggestion?
Thank you
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Rich RumbleSecurity SamuraiCommented:
Make sure it works in general I suppose, format it NTFS (quick) and see if you can see it then... otherwise there is something else wrong.
-rich
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coerraceAuthor Commented:
I solved making a quick format encryption first and then make a full format.
Thank you
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coerraceAuthor Commented:
All ok
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