Is it important the partition Id when partition a hard disk with fdisk in Linux?

Robert Xu robxu9 at
Thu Jun 3 20:31:43 PDT 2010

On Thu, Jun 3, 2010 at 23:25, littlebat <dashing.meng at> wrote:
> Hi,
> I found a fact, I set the wrong partition Id to a hard disk partition when I use fdisk in Linux, after I format this partition with mkfs command, this partition is always work for me.
> For example, I seted a partition Id with "b" (vfat, it should be "83" for a Linux partition), and format it to a ext3 file system with command mkfs.ext3, the everything is ok.
> So I don't know what is the function of this partition Id? Is there any issue when set this wrong partition Id like the previous example? Is it only a two words' tag in Disk Partition Table and no any other meaning?

I think it's just for the system to identify what the partition is
supposed to be for. While in your case it works, I tried it once and
it killed my hard disk. (I'm just lucky I was using Virtualbox :P).
You might lose some functions, maybe?

--later, Robert Xu

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