What ar eyou trying to do? If your goal is to run Windows on your Mac you need to use Boot Camp Assistant to format and install Windows in a Boot Camp partition. If your goal is to format an external drive to use with both Windows and a Mac then format the drive ExFat. It is not clear what you are trying to achieve.
Mbr Or Gpt For Mac
There was a 2TB limit for FAT32, but I think that is resolved, except on macOS. Apple doesn't care to keep up with the older file system formats that should just be dead, now. I don't think it was related to MBR, but possible.
I would use GUID partition type if you are just going to be storing data on the external drive. I believe Win7 is able to understand GUID partitions so it should not be a problem unless you need to be compatible with WinXP for some reason.
You have to partition a disk drive before you can use it. MBR (Master Boot Record) and GPT (GUID Partition Table) are two different ways of storing the partitioning information on a drive. This information includes where partitions begin and end on the physical disk, so your operating system knows which sectors belong to each partition and which partition is bootable. This is why you have to choose MBR or GPT before creating partitions on a drive.
I am not an expert but from new release of Mac OS X which includes a feature called Time Machine, which I find highly useful. GPT is the requirement for Mac OS X Lion ... so on this basis I would say that GPT is more useful than MBR.
To get around the limit, one of the partitions is usually created as an "extended partition" which nestedly contains a series of "logical partitions". The most common scheme for this is an Extended Boot Record, though BSD systems often nest a BSD disklabel instead.
MBR partitions have a 1-byte "type" code, which is too small to be useful (most operating systems use very generic type codes and just guess the rest). Windows NT also introduced a 4-byte "disk ID" for distinguishing between multiple disks of the same model.
GPT, as its name tells, uses a 16-byte GUID for partition type, another GUID for identifying a specific partition (the partuuid), and yet another GUID for identifying the whole disk (similar in purpose to the MBR "disk ID"). It also reserves 72 bytes (UTF-16) for a partition label.
"Regular" IBM-compatible PCs can boot any disk as long as the 0th sector contains a valid BIOS bootloader and the AA55h boot signature. This usually means MBR, but all GPT-partitioned disks have a "protective MBR" that satisfies this requirement.
(Exceptions: Some specific BIOS versions reject the GPT "protective MBR" as invalid, due to bugs or misfeatures. Also, Windows will refuse to boot from a GPT disk on BIOS systems, or from a MBR disk on UEFI systems, due to reasons unknown.)
In BIOS systems, the initial boot loader is part of the MBR. There can only be one bootloader in the MBR, resulting in conflicts when installing dual-boot systems. Due to the x86 DOS origins of the MBR bootloader, code is specific to the x86 architecture.
GPT (GUID Partition Table) is generally used in conjunction with Intel's EFI BIOS replacement. As such, it is mostly used by Apple currently in their Intel Macs. Any Mac running 10.4 or above can read a GPT disk; only Intel Macs can boot from them. If a computer has EFI, you can boot Windows on a GPT disk.
I'd say the assertion you made in the question ("GPT is more useful than MBR") is incorrect: you can certainly boot more computers with an MBR disk than one using GPT. GPT is the way of the future, but it may take awhile for the major PC manufacturers to switch to EFI from BIOS.
Even before Boot Camp was released,elilo (the EFI Linux Loader)was used to boot Linux on Intel Macs.However, this requires a specially prepared kernel and has some drawbacks(like not having 2D/3D accellerated graphics, see below).
GPT (GUID Partition Table) is a partition type for disks. When formatting Mac-formatted disks, such as HFS+ or HFS+J, in Disk Utility, current versions of the Mac OS typically use GPT as the default partition type.
MacDrive fully supports GPT partitioning for fixed disks. Fixed disks can include internal hard drives, but can also include portable devices such as external hard drives which connect via USB, FireWire, etc.
No additional software is needed to access a Mac-formatted disk that is GPT partitioned. You can simply connect the disk to your computer, and MacDrive will be able to access the disk and assign it a drive letter.
To create a removable drive that will work with MacDrive, you can use either Disk Utility or the MacDrive Disk Manager. Please make sure to migrate any data from the device as repartitioning it will erase all data.
If you're attempting to use MBR on your internal drive, this is not recommended. macOS runs best when the internal drive uses GPT. Additionally, using FileVault (as far as I know) requires the drive to use GPT.
Previous versons of OS X and macOS automatically converted pure GPT drives to hybrid GPT/MBR format when the 2nd, 3rd, and/or 4th GPT partitions were formatted "MS DOS (FAT)" by the Disk Utility application or the diskutil command. I am not sure when this changed, but this no longer happens under High Sierra (macOS 10.13.2).
Disable SIP and then boot back to macOS. This will allow you to use the commands gpt, gdisk and fdisk. You also can execute gpt, gdisk and fdisk from macOS Recovery, but this may require you to precede the gdisk command with a path.
The command given below can be used to partially display the information contained in GPT stored on disk0. You will need this information verify the changes made to the MBR table. (See the above question for the output from this command.)
Below is an example of the output after entering the command. Except for the start value of partition 1, the remaining start and size values should match the output from the gpt -r show /dev/disk0 command.
Unless you disable System Integrity Protection (SIP), the solution given below requires booting to macOS Recovery via the internet, built-in recovery or an USB flash drive macOS installer. Once booted to macOS Recovery or a macOS installer, open a Terminal application window.
The command given below can be used to partially display the information contained in GPT stored on disk0. You will need this information when editing the MBR table. (See the above question for the output from this command.)
The only entry, in the initial MBR partition table, defines a "Protective Partition". This partition needs to be truncated to the end of the first partition in the GPT with the partition type GUID of C12A7328-F81F-11D2-BA4B-00A0C93EC93B. This can be accomplished by first entering the command edit 1. Next, enter EE to leave the Partition id unchanged. Since changes will be not be entered in CHS mode, enter N when prompted for an answer to the question Do you wish to edit in CHS mode? [n]. A value of 1 should be entered for the Partition offset. The value to be entered for the Partition size can be computed from the start and size values given for the first partition in the GPT with the partition type GUID of C12A7328-F81F-11D2-BA4B-00A0C93EC93B. This value is equal to the start + size - 1. Below is the resulting output after making the above entries.
Next, enter the correct values for partition 2. The command is edit 2 and the Partition id is FF. The Partition offset and Partition size values to be entered are the same as start and size values shown in the GPT for the partition with an index of 2. Doing so, results in what is shown below.
The next command to enter is print. This command displays what the updated MBR table would look like. The result is shown below. You can use the output to verify your changes. Except for the start value of partition 1, the remaining start and size values should match the output from the gpt -r show /dev/disk0 command.
After 3 days visiting several pages with tutorials, forums in which it is mentioned that it is impossible to do it and others in which partially possible but losing partial functionality of graphics and sound totally, as well as searched the online help of Microsoft to consult information about options of some specific commands, I have found the solution.
Apple iMac Mid 2011, without optical disc.Two SSDs have been installed in each of the available Sata III ports, and an HDD in the Sata II port of the optical unit (optical unit obviously have been removed).
Install the macOS Sierra system in SSD Nº1.Move the "Users" folder to the HDD (about how to do this there are tutorials on the internet, it is not the subject of this tutorial)Install Windows 10 on the SSD No. 2, so that the graphics work well, as well as the sound works.
Now create the partition in which we will then copy the Windows files. In my case, I want this partition to occupy the rest of the disk, starting from the end of the System partition to the end of the disk:
Now we will use the bcdboot command, which will enable the system boot. ATTENTION. This point is important since the boot that must be created is BIOS type and not EFI type, since in this last case, the sound will not work.
You could then make a hybrid disk by using the Disk Utility application included with Sierra. First, you install regular Sierra into a new partition. When you're done, boot to regular Sierra, open the Disk utility, create the FAT partition, and you have a hybrid partition.
I am trying to examine my settings to prepare for a triple boot and would like to know how to completely examine my HDD before to make sure I know everything usefull for the project to know about it.
refit is a bootmanager (that is currently not maintained any more) that comes with a tool, which is called gptsync or Partition Inspector. Its output looks like this:
GPT is an abbreviation standing for GUID Partition Table. The more established MBR partitioning scheme failed to support new hardware that was being developed. This prompted Intel to develop a new partition which became UEFI where GPT is a subset. Compared with MBR, GPT is able to support volumes of larger than 2 TB which MBR cannot. GPT also replaces the bulky old MBR partitioning system with a more modern one. Every partition in the GUID Partition Table has a globally unique identifier which is an unsystematic string that is so long in such a way that every GPT Partition in this world has its own specific identifier unlike MBR. 2ff7e9595c
Comments