Partitioning disk larger than 2 TB

On the server increased disk space. They put 8 disks of 750 GB each, combining them into the fifth raid. As a result, we received an array of about 4.5 TB. This is where the MBR limit is 2 TB. I don’t know how things are under Windows, maybe everything’s automated there, but our server is FreeBSD 6.2, and the standard sysinstall installer stubbornly didn’t want to split the disk into full volume. GUID partition table (GPT) came to the rescue.

UPD: On Windows Server, everything really happens automatically. The only thing that GPT is available since Windows Server 2003 Service Pack 1. <p />


Breaking up is very simple. The gtp utility in FreeBSD has simple commands. To create a partition, execute the command
gpt create da0
or, if mbr is already created,
gpt migrate da0
gpt add da0
gpt label -a -l <label> da0
newfs / dev / da0p1
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The last command formats the created partition. SoftUpdates may be absent on it, therefore it is desirable to enable this option:
tunefs -n enable / dev / da0p1

That's it, now you can mount the disk and work with it.