External backup hard drive, should it be MBR or GPT?

On a computer using Windows 7 64 bit. When using external hard drives for data backup. Is it better to format them for MBR or GPT?

I know MBR is old. And I believe the GPT has redundant partition tables. Though have read of some people having trouble getting data off of drives with GPT as the partitions are "protected".

I thought of going with GPT as it has redundant partition tables, whereas MBR only has a single partition table that if it gets corrupted. That can/will screw the whole drive up and the data on it.

I only use these hard drives for data backup.

This is something you really have to research and decide for yourself. So many variables.

What

GPT vs. MBR: How the humble drive partition led to the larger hard drives we all love | PCWorld

I have researched. And like in your links. Regarding MBR vs. GPT, it just talks about the internal hard drive that runs the OS. I don't see much if any discussion on what you should use on an external hard drive that just stores data.

Only thing I've seen is that Windows 7 can read off of GPT, just that if you want to run the OS off of GPT, then your motherboard has to support it.

Was seeing if there was a consensus on what is better to go with for an external hard drive that is used for data backup. I'd be using Windows 7 to open the external hard drive.

Like the articles say, the drive has to be GPT if it`s over 2 TB for windows to use all of it, if you want more then 4 partitions on the drive etc.

Other then that, I personally see no advantage, all my storage drives are MBR.

Member kbrady1979 has a lot of very large drives, (5 TB) perhaps you could get good advice from him

Looks like GPT is safer from boot corruption compared to MBR. Also viruses/malware can get into the MBR and not sure how well anti-virus and anti-malware scans this area.

I believe starting with Windows 8, the internal hard drives have to be configured to GPT.

There are 2 main reasons to have a GPT drive:

1. The drive is larger than 2.2GB
2. You want to have more than 4 primary partitions.

All the rest is neither here not there. For a Windows 7 system, I would go with MBR for a 2TB or smaller drive.

jasonsmith said:

I believe starting with Windows 8, the internal hard drives have to be configured to GPT.

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I was not aware of this.

Can anyone confirm GPT is required on a small boot drive for Win 8 and later?

I don't think that is a requirement. I have all different cases:

1. only 1 active C partition in VMware Player and that is an MBR partition
2. only 2 partitions with 32bit - C (active) and Recovery in GPT
3. 6 primary partitions in GPT with an EFI (active) partition in Fat32

It looks like a normal 8.1 installation will come in GPT, but 8.1 can also run in MBR.

No, it is not required.

8, 8.1, 10 all run from a MBR partitioned drive just fine.

It all depends on what bios you want to use.

Now you are opening another bag of worms - UEFI. There you probably need GPT.

With MBR, don't you have more risk of a virus getting in the MBR section and sitting there forever compared to GPT? Not sure how well anti-virus scans the MBR section of an external hard drive. I don't believe software that wipes the entire drive touches the MBR section.

I had read GPT eliminates the risk that you have with a virus getting in and replacing the MBR avoiding detection.

I would DOD wipe and slow format hard drives thinking it was wiping the entire disk removing any and all viruses that may be there. Then I learned that it may not be touching the MBR where a virus can hide undetected and reinfect.

That's when I learned of the GPT and thought that may be a safer option to use for external hard drive since I don't need to boot from it. I don't believe you have an MBR to worry about getting infected sitting there with GPT.

whs said:

Now you are opening another bag of worms - UEFI. There you probably need GPT.

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Exactly.

Wolfgang: If you were building a PC from the ground up tomorrow and using a smallish SSD for the OS and programs and HDDs for storage, would you use GPT or MBR for the boot drive? Assume you have a motherboard that supports UEFI.

As I understand it, you can use MBR partitions on the boot drive and still have the UEFI "look". You just wouldn't have UEFI boot.

I'm going to face this in 6 months or so and am trying to find out if there is some strong over-riding advantage to GPT and UEFI on a boot SSD drive. I'll use GPT on my large storage drives of course.

So far, it appears that UEFI has some so-called advantages, but I'm perfectly comfortable with BIOS and MBR and I'm not clear on how problem-free UEFI is---the last thing I want is problems or compatibility issues.

Nor am I clear on how avoiding an MBR boot disk might affect certain programs---such as Macrium or other backup apps.

jasonsmith said:

With MBR, don't you have more risk of a virus getting in the MBR section and sitting there forever compared to GPT? ......

.......That's when I learned of the GPT and thought that may be a safer option to use for external hard drive since I don't need to boot from it. I don't believe you have an MBR to worry about getting infected sitting there with GPT.

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Ah............! Your conceptions are baseless.

Even non-bootable GPT drives - internal or external - will have a Protective MBR at sector 0. And if this protective MBR gets corrupted by any means, you will lose access to your GPT drive and Windows will ask you to initialise and format it .

Here goes my 750GB Seagate GPT External drive with two partitions each holding some 3.5 GB of data.I zeroed this sector 0 - that is corrupted it. Access lost.



Windows Disk Management is asking me to initialise it. Should I?

Nope, I won't, for I have a copy of sector 0, PMBR0.bin backed up and I will simply restore Sector 0 with it.



Hoila .... I am back in business.



The restored Protective MBR at sector 0:



The moral of the story is, if you have diligently backed up the GPT structure data of your drive and if your drive is afflicted with corrupted structure (partition related) you should be able to restore the drive easily. Even if not - meaning that it may not exclusively be a partition related problem - restoring the GPT structure can greatly ease any data recovery attempt.

In the case of MBR disks, one will need to backup only sector 0, the MBR sector. That also contains the partition table. Restoring Sector 0 will instantly resolve the issue of " My drive has suddenly turned RAW" in most cases.

In the case of GPT drives, if one has four partitions as seen by bootice, save Sector 0 ( the protective MBR), sector 1 ( the GPT Header) sector 2 ( GPT partition table of first four partitions), sector n( the last sector of the drive where the backup of GPT Header resides) and sector n-32 ( where the backup of sector 2, the first four partition table resides)

Nor am I clear on how avoiding an MBR boot disk might affect certain programs---such as Macrium or other backup apps.

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Macrium works on UEFI systems. I have already done images and restored them.

whs said:

Nor am I clear on how avoiding an MBR boot disk might affect certain programs---such as Macrium or other backup apps.

Click to expand...

Macrium works on UEFI systems. I have already done images and restored them.

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I see no reason not to use GPT on newly formatted external hard drives for data storage unless you need to use to the same external hard drive on a computer that uses an older version Windows than Vista (XP and older).

Sorry guys for adding to an old thread but I had a similar problem. My Window XP needed rebuilding so I needed to backup all files before as Windows XP formats the drive before installing.

I bought a Seagate expansion 2TB drive from Curry's

https://www.currys.co.uk/gbuk/compu...ernal-hard-drive-2-tb-black-10127631-pdt.html

My Windows XP was causing problems so I plugged the drive into my Windows 7 laptop to format the drive. I plugged it into Windows XP and the USB icon showed in the task bar but the drive wouldn't autorun. I checked My Computer and the drive wasn't listed.

I Goggled this problem and another forum I use had the same question.

I tried Disk Management showed the drive as GTP. I did a screendump an saved the picture for reference. I plugged the drive in the next day and Disk Management didn't show GPT so I did another screendump.

I decided to remove all files I need to my Windows 7 there was enough free space.

I ran cmd diskpart, list disk, select disk 1

clean, create primary partition, select partition 1, active

I tried format fs=ntfs quick but that didn't do anything

I went back to Disk Management and that showed the drive unallocated. I right-click on the drive which brought up add new hardware. Then is showed format the drive. This time it showed format GTP or format MBR. I formatted it MBR.

Its strange that the normal Windows 7 format doesn't show format GTP or MBR when you format 2TB drives.

Anyway I plugged it into Windows XP and the drive shows. So my problem is now solved.

whs said:

For a Windows 7 system, I would go with MBR for a 2TB or smaller drive.

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Agreed. MBR has been around for a long time. You are keeping things simple when you stay with the older technology. But this applies only if your drive is 2TB or smaller.