Hi,
Converting a TrueCrypt volume by changing should be enough since this will update the header to use a stronger key derivation.
VeraCrypt and TrueCrypt use the same encryption format (XTS) and after the conversion the master key generated by TrueCrypt will be reused by VeraCrypt since it can't be changed.
This master key was generated using TrueCrypt random generator which is the same as VeraCrypt one. The only enhancement done in VeraCrypt is that we ensure that the random generator is seeded correctly before each sensitive operation whereas in TrueCrypt this was done only once.
So, I don't see any reason to create a new partition.
That being said, you should also take into account the age of the hard drive because hard drives are not eternal and they tend to fail. Also, new disks can fail quickly so you should maintain a double backup at least for some time to be sure that the new disk is also reliable.
Converting a TrueCrypt volume by changing should be enough since this will update the header to use a stronger key derivation.
VeraCrypt and TrueCrypt use the same encryption format (XTS) and after the conversion the master key generated by TrueCrypt will be reused by VeraCrypt since it can't be changed.
This master key was generated using TrueCrypt random generator which is the same as VeraCrypt one. The only enhancement done in VeraCrypt is that we ensure that the random generator is seeded correctly before each sensitive operation whereas in TrueCrypt this was done only once.
So, I don't see any reason to create a new partition.
That being said, you should also take into account the age of the hard drive because hard drives are not eternal and they tend to fail. Also, new disks can fail quickly so you should maintain a double backup at least for some time to be sure that the new disk is also reliable.
