I have a new 4TB drive, which I want to use as an external drive with my laptop (Windows 7 ultimate, 64-bit).
From all that I can read, my Windows version should support it, but I can't find anything about using it as an external drive (not that I think that should make any difference, but ...).
When I go to Disk Management on my laptop, I am told that I must initialize the disk. I choose to do so as GPT because that will support > 2TB and MBR will not. I get an error "The device is not ready" and the disk is shown as "not initialized".
However, if I insert the disk into a desktop as an internal drive then I can create a 4TB partition. I can copy a text file to that, edit it, rename it, delete it.
If I remove the disk from the desktop and connect it externally to the laptop, I get the same problem - disk not initialized / device not ready.
So, I put the disk back into the desktop and see the 4TB partition with its single lonely text file. Hmmm. I repatriation the disk to have 2 partitions each a little less than 2TB - presumably at least the first of these would be visible on the laptop, if not both?
Nope, same problem: when I connect it externally to the laptop, I get the same problem - disk not initialized / device not ready.
I have googled extensively, but can find not help. Hopefully someone here knows better ...
[Update] @Karan (+1) Did you just buy a bare drive and pop it into an enclosure? If so the enclosure might very well be to blame for this.
gronostaj, thanks fpr the suggestion. I can't initialize it as MBR either - "the device is not ready"
Yes, I did. Can you explain how I might be able to use this drive?
It turns out that at the current time (May 2013) most external housings support max 3TB. I was using one of those multi-purpose IDE/SATA 2.5"/3.5" converters which explains why it didn't work.
I just bought a new USB 3 external housing which is one of the few which support 4TB and it works beautifully
I just bought a new 2TB disk drive I plan to use as an external drive (connected via eSATA). When I started my computer it recognized the drive fine, but when I got into the Disk Management, a popup told me that I have to initialize that drive and I have to choose between MBR and GPT layout.
The drive will be primarily used on Windows 7 computers (both x86 and x64) as well as on a Windows Vista x64 computer (which is the one the message appeared on).
I do not plan to create multiple partitions on that drive as it is only supposed to be a data storage disk.
Which partition layout should I choose, MBR or GPT? The dialog itself recommends to use GPT on drives >= 2TB or on Itanium based computers, but I want to make sure that I will be able to access the drive later on my other computers.
GPT will not be usable by XP and earlier systems (I think), so avoid it if that is an issue. Not having seen an XP machine in 3 years it's not an issue for me so I use it in preference to MBR, but it makes little difference at this point in time. At some point, you will have to use GPT, until then, make a choice.
As of now, support for GPT among common systems is limited. Check out the list of supported OSes here: http://en.wikipedia.org/wiki/GUID_Partition_Table#OS_support_of_GPT